diff --git a/package/network/utils/iproute2/patches/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch b/package/network/utils/iproute2/patches/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
new file mode 100644
index 0000000000..530a9e8a85
--- /dev/null
+++ b/package/network/utils/iproute2/patches/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
@@ -0,0 +1,147 @@
+From c6bdd0d302119819de72439972d0462c26ef9eda Mon Sep 17 00:00:00 2001
+From: Felix Janda <felix.janda@posteo.de>
+Date: Sun, 12 Nov 2017 13:30:17 -0500
+Subject: uapi libc compat: add fallback for unsupported libcs
+
+libc-compat.h aims to prevent symbol collisions between uapi and libc
+headers for each supported libc. This requires continuous coordination
+between them.
+
+The goal of this commit is to improve the situation for libcs (such as
+musl) which are not yet supported and/or do not wish to be explicitly
+supported, while not affecting supported libcs. More precisely, with
+this commit, unsupported libcs can request the suppression of any
+specific uapi definition by defining the correspondings _UAPI_DEF_*
+macro as 0. This can fix symbol collisions for them, as long as the
+libc headers are included before the uapi headers. Inclusion in the
+other order is outside the scope of this commit.
+
+All infrastructure in order to enable this fallback for unsupported
+libcs is already in place, except that libc-compat.h unconditionally
+defines all _UAPI_DEF_* macros to 1 for all unsupported libcs so that
+any previous definitions are ignored. In order to fix this, this commit
+merely makes these definitions conditional.
+
+This commit together with the musl libc commit
+
+http://git.musl-libc.org/cgit/musl/commit/?id=04983f2272382af92eb8f8838964ff944fbb8258
+
+fixes for example the following compiler errors when <linux/in6.h> is
+included after musl's <netinet/in.h>:
+
+./linux/in6.h:32:8: error: redefinition of 'struct in6_addr'
+./linux/in6.h:49:8: error: redefinition of 'struct sockaddr_in6'
+./linux/in6.h:59:8: error: redefinition of 'struct ipv6_mreq'
+
+The comments referencing glibc are still correct, but this file is not
+only used for glibc any more.
+
+Signed-off-by: Felix Janda <felix.janda@posteo.de>
+Reviewed-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/libc-compat.h | 55 +++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 54 insertions(+), 1 deletion(-)
+
+--- a/include/uapi/linux/libc-compat.h
++++ b/include/uapi/linux/libc-compat.h
+@@ -168,46 +168,99 @@
+ 
+ /* If we did not see any headers from any supported C libraries,
+  * or we are being included in the kernel, then define everything
+- * that we need. */
++ * that we need. Check for previous __UAPI_* definitions to give
++ * unsupported C libraries a way to opt out of any kernel definition. */
+ #else /* !defined(__GLIBC__) */
+ 
+ /* Definitions for if.h */
++#ifndef __UAPI_DEF_IF_IFCONF
+ #define __UAPI_DEF_IF_IFCONF 1
++#endif
++#ifndef __UAPI_DEF_IF_IFMAP
+ #define __UAPI_DEF_IF_IFMAP 1
++#endif
++#ifndef __UAPI_DEF_IF_IFNAMSIZ
+ #define __UAPI_DEF_IF_IFNAMSIZ 1
++#endif
++#ifndef __UAPI_DEF_IF_IFREQ
+ #define __UAPI_DEF_IF_IFREQ 1
++#endif
+ /* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 1
++#endif
+ /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
++#endif
+ 
+ /* Definitions for in.h */
++#ifndef __UAPI_DEF_IN_ADDR
+ #define __UAPI_DEF_IN_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN_IPPROTO
+ #define __UAPI_DEF_IN_IPPROTO		1
++#endif
++#ifndef __UAPI_DEF_IN_PKTINFO
+ #define __UAPI_DEF_IN_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP_MREQ
+ #define __UAPI_DEF_IP_MREQ		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN
+ #define __UAPI_DEF_SOCKADDR_IN		1
++#endif
++#ifndef __UAPI_DEF_IN_CLASS
+ #define __UAPI_DEF_IN_CLASS		1
++#endif
+ 
+ /* Definitions for in6.h */
++#ifndef __UAPI_DEF_IN6_ADDR
+ #define __UAPI_DEF_IN6_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN6_ADDR_ALT
+ #define __UAPI_DEF_IN6_ADDR_ALT		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN6
+ #define __UAPI_DEF_SOCKADDR_IN6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_MREQ
+ #define __UAPI_DEF_IPV6_MREQ		1
++#endif
++#ifndef __UAPI_DEF_IPPROTO_V6
+ #define __UAPI_DEF_IPPROTO_V6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_OPTIONS
+ #define __UAPI_DEF_IPV6_OPTIONS		1
++#endif
++#ifndef __UAPI_DEF_IN6_PKTINFO
+ #define __UAPI_DEF_IN6_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP6_MTUINFO
+ #define __UAPI_DEF_IP6_MTUINFO		1
++#endif
+ 
+ /* Definitions for ipx.h */
++#ifndef __UAPI_DEF_SOCKADDR_IPX
+ #define __UAPI_DEF_SOCKADDR_IPX			1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEFINITION
+ #define __UAPI_DEF_IPX_ROUTE_DEFINITION		1
++#endif
++#ifndef __UAPI_DEF_IPX_INTERFACE_DEFINITION
+ #define __UAPI_DEF_IPX_INTERFACE_DEFINITION	1
++#endif
++#ifndef __UAPI_DEF_IPX_CONFIG_DATA
+ #define __UAPI_DEF_IPX_CONFIG_DATA		1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEF
+ #define __UAPI_DEF_IPX_ROUTE_DEF		1
++#endif
+ 
+ /* Definitions for xattr.h */
++#ifndef __UAPI_DEF_XATTR
+ #define __UAPI_DEF_XATTR		1
++#endif
+ 
+ #endif /* __GLIBC__ */
+ 
diff --git a/package/network/utils/iproute2/patches/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch b/package/network/utils/iproute2/patches/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
deleted file mode 100644
index e3364ad059..0000000000
--- a/package/network/utils/iproute2/patches/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
+++ /dev/null
@@ -1,107 +0,0 @@
-From f972afc2509eebcb00d370256c55b112a3b5ffca Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Date: Mon, 29 Jun 2015 16:50:40 +0200
-Subject: [PATCH 2/3] uapi/libc-compat.h: do not rely on __GLIBC__
-
-Musl provides the same structs as glibc, but does not provide a define to
-allow its detection. Since the absence of __GLIBC__ also can mean that it
-is included from the kernel, change the __GLIBC__ detection to
-!__KERNEL__, which should always be true when included from userspace.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/libc-compat.h | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
-
---- a/include/uapi/linux/libc-compat.h
-+++ b/include/uapi/linux/libc-compat.h
-@@ -49,13 +49,13 @@
- #ifndef _LIBC_COMPAT_H
- #define _LIBC_COMPAT_H
- 
--/* We have included glibc headers... */
--#if defined(__GLIBC__)
-+/* We have included libc headers... */
-+#if !defined(__KERNEL__)
- 
--/* Coordinate with glibc net/if.h header. */
--#if defined(_NET_IF_H) && defined(__USE_MISC)
-+/* Coordinate with libc net/if.h header. */
-+#if defined(_NET_IF_H) && (!defined(__GLIBC__) || defined(__USE_MISC))
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- 
- #define __UAPI_DEF_IF_IFCONF 0
-@@ -66,7 +66,11 @@
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 0
- /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
- #ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
-+#ifdef __GLIBC__
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
-+#else
-+#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0
-+#endif
- #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
- 
- #else /* _NET_IF_H */
-@@ -86,10 +90,10 @@
- 
- #endif /* _NET_IF_H */
- 
--/* Coordinate with glibc netinet/in.h header. */
-+/* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- #define __UAPI_DEF_IN_ADDR		0
- #define __UAPI_DEF_IN_IPPROTO		0
-@@ -103,7 +107,7 @@
-  * if the glibc code didn't define them. This guard matches
-  * the guard in glibc/inet/netinet/in.h which defines the
-  * additional in6_addr macros e.g. s6_addr16, and s6_addr32. */
--#if defined(__USE_MISC) || defined (__USE_GNU)
-+#if !defined(__GLIBC__) || defined(__USE_MISC) || defined (__USE_GNU)
- #define __UAPI_DEF_IN6_ADDR_ALT		0
- #else
- #define __UAPI_DEF_IN6_ADDR_ALT		1
-@@ -118,7 +122,7 @@
- #else
- 
- /* Linux headers included first, and we must define everything
-- * we need. The expectation is that glibc will check the
-+ * we need. The expectation is that the libc will check the
-  * __UAPI_DEF_* defines and adjust appropriately. */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
-@@ -128,7 +132,7 @@
- #define __UAPI_DEF_IN_CLASS		1
- 
- #define __UAPI_DEF_IN6_ADDR		1
--/* We unconditionally define the in6_addr macros and glibc must
-+/* We unconditionally define the in6_addr macros and the libc must
-  * coordinate. */
- #define __UAPI_DEF_IN6_ADDR_ALT		1
- #define __UAPI_DEF_SOCKADDR_IN6		1
-@@ -169,7 +173,7 @@
- /* If we did not see any headers from any supported C libraries,
-  * or we are being included in the kernel, then define everything
-  * that we need. */
--#else /* !defined(__GLIBC__) */
-+#else /* defined(__KERNEL__) */
- 
- /* Definitions for if.h */
- #define __UAPI_DEF_IF_IFCONF 1
-@@ -209,6 +213,6 @@
- /* Definitions for xattr.h */
- #define __UAPI_DEF_XATTR		1
- 
--#endif /* __GLIBC__ */
-+#endif /* __KERNEL__ */
- 
- #endif /* _LIBC_COMPAT_H */
diff --git a/package/network/utils/iproute2/patches/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch b/package/network/utils/iproute2/patches/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
index abd1f7eaca..ef4a715bee 100644
--- a/package/network/utils/iproute2/patches/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
+++ b/package/network/utils/iproute2/patches/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
@@ -1,18 +1,20 @@
-From fcbb6fed85ea9ff4feb4f1ebd4f0f235fdaf06b6 Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
+From 649affd04813c43e0a72886517fcfccd63230981 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
 Date: Mon, 29 Jun 2015 16:53:03 +0200
-Subject: [PATCH 3/3] uapi/if_ether.h: prevent redefinition of struct ethhdr
+Subject: uapi/if_ether.h: prevent redefinition of struct ethhdr
 
 Musl provides its own ethhdr struct definition. Add a guard to prevent
 its definition of the appropriate musl header has already been included.
 
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+glibc does not implement this header, but when glibc will implement this
+they can just define __UAPI_DEF_ETHHDR 0 to make it work with the
+kernel.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 ---
- include/uapi/linux/if_ether.h    |  3 +++
- include/uapi/linux/libc-compat.h | 11 +++++++++++
- 2 files changed, 14 insertions(+)
+ include/uapi/linux/if_ether.h    | 3 +++
+ include/uapi/linux/libc-compat.h | 6 ++++++
+ 2 files changed, 9 insertions(+)
 
 --- a/include/uapi/linux/if_ether.h
 +++ b/include/uapi/linux/if_ether.h
@@ -40,28 +42,14 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  #endif /* _LINUX_IF_ETHER_H */
 --- a/include/uapi/linux/libc-compat.h
 +++ b/include/uapi/linux/libc-compat.h
-@@ -90,6 +90,14 @@
+@@ -264,4 +264,10 @@
  
- #endif /* _NET_IF_H */
+ #endif /* __GLIBC__ */
  
-+/* musl defines the ethhdr struct itself in its netinet/if_ether.h.
-+ * Glibc just includes the kernel header and uses a different guard. */
-+#if defined(_NETINET_IF_ETHER_H)
-+#define __UAPI_DEF_ETHHDR		0
-+#else
++/* Definitions for if_ether.h */
++/* allow libcs like musl to deactivate this, glibc does not implement this. */
++#ifndef __UAPI_DEF_ETHHDR
 +#define __UAPI_DEF_ETHHDR		1
 +#endif
 +
- /* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
-@@ -185,6 +193,9 @@
- /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
- 
-+/* Definitions for if_ether.h */
-+#define __UAPI_DEF_ETHHDR 		1
-+
- /* Definitions for in.h */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
+ #endif /* _LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-3.18/002-phy_drivers_backport.patch b/target/linux/generic/pending-3.18/002-phy_drivers_backport.patch
index 63071c9997..504d772def 100644
--- a/target/linux/generic/pending-3.18/002-phy_drivers_backport.patch
+++ b/target/linux/generic/pending-3.18/002-phy_drivers_backport.patch
@@ -464,7 +464,7 @@
  module_init(psb6970_init);
 --- a/drivers/net/phy/rtl8306.c
 +++ b/drivers/net/phy/rtl8306.c
-@@ -876,7 +876,7 @@ rtl8306_config_init(struct phy_device *p
+@@ -877,7 +877,7 @@ rtl8306_config_init(struct phy_device *p
  	int err;
  
  	/* Only init the switch for the primary PHY */
@@ -473,7 +473,7 @@
  		return 0;
  
  	val.value.i = 1;
-@@ -886,7 +886,7 @@ rtl8306_config_init(struct phy_device *p
+@@ -887,7 +887,7 @@ rtl8306_config_init(struct phy_device *p
  	priv->dev.ops = &rtl8306_ops;
  	priv->do_cpu = 0;
  	priv->page = -1;
@@ -482,7 +482,7 @@
  
  	chipid = rtl_get(dev, RTL_REG_CHIPID);
  	chipver = rtl_get(dev, RTL_REG_CHIPVER);
-@@ -932,13 +932,13 @@ rtl8306_fixup(struct phy_device *pdev)
+@@ -933,13 +933,13 @@ rtl8306_fixup(struct phy_device *pdev)
  	u16 chipid;
  
  	/* Attach to primary LAN port and WAN port */
@@ -498,7 +498,7 @@
  	chipid = rtl_get(&priv.dev, RTL_REG_CHIPID);
  	if (chipid == 0x5988)
  		pdev->phy_id = RTL8306_MAGIC;
-@@ -956,14 +956,14 @@ rtl8306_probe(struct phy_device *pdev)
+@@ -957,14 +957,14 @@ rtl8306_probe(struct phy_device *pdev)
  		 * share one rtl_priv instance between virtual phy
  		 * devices on the same bus
  		 */
@@ -515,7 +515,7 @@
  
  found:
  	pdev->priv = priv;
-@@ -984,7 +984,7 @@ rtl8306_config_aneg(struct phy_device *p
+@@ -985,7 +985,7 @@ rtl8306_config_aneg(struct phy_device *p
  	struct rtl_priv *priv = pdev->priv;
  
  	/* Only for WAN */
@@ -524,7 +524,7 @@
  		return 0;
  
  	/* Restart autonegotiation */
-@@ -1000,7 +1000,7 @@ rtl8306_read_status(struct phy_device *p
+@@ -1001,7 +1001,7 @@ rtl8306_read_status(struct phy_device *p
  	struct rtl_priv *priv = pdev->priv;
  	struct switch_dev *dev = &priv->dev;
  
@@ -533,7 +533,7 @@
  		/* WAN */
  		pdev->speed = rtl_get(dev, RTL_PORT_REG(4, SPEED)) ? SPEED_100 : SPEED_10;
  		pdev->duplex = rtl_get(dev, RTL_PORT_REG(4, DUPLEX)) ? DUPLEX_FULL : DUPLEX_HALF;
-@@ -1041,6 +1041,7 @@ static struct phy_driver rtl8306_driver
+@@ -1044,6 +1044,7 @@ static struct phy_driver rtl8306_driver
  	.config_init	= &rtl8306_config_init,
  	.config_aneg	= &rtl8306_config_aneg,
  	.read_status	= &rtl8306_read_status,
@@ -541,7 +541,7 @@
  };
  
  
-@@ -1048,7 +1049,7 @@ static int __init
+@@ -1051,7 +1052,7 @@ static int __init
  rtl_init(void)
  {
  	phy_register_fixup_for_id(PHY_ANY_ID, rtl8306_fixup);
diff --git a/target/linux/generic/pending-3.18/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch b/target/linux/generic/pending-3.18/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
deleted file mode 100644
index 762f4989b6..0000000000
--- a/target/linux/generic/pending-3.18/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
+++ /dev/null
@@ -1,34 +0,0 @@
-From 8b05e325824d3b38e52a7748b3b5dc34dc1c0f6d Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Date: Mon, 29 Jun 2015 14:37:54 +0200
-Subject: [PATCH 1/3] uapi/kernel.h: glibc specific inclusion of sysinfo.h
-
-including sysinfo.h from kernel.h makes no sense whatsoever,
-but removing it breaks glibc's userspace header,
-which includes kernel.h instead of sysinfo.h from their sys/sysinfo.h.
-this seems to be a historical mistake.
-on musl, including any header that uses kernel.h directly or indirectly
-plus sys/sysinfo.h will produce a compile error due to redefinition of
-struct sysinfo from sys/sysinfo.h.
-so for now, only include it on glibc or when including from kernel
-in order not to break their headers.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Signed-off-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/kernel.h | 2 ++
- 1 file changed, 2 insertions(+)
-
---- a/include/uapi/linux/kernel.h
-+++ b/include/uapi/linux/kernel.h
-@@ -1,7 +1,9 @@
- #ifndef _UAPI_LINUX_KERNEL_H
- #define _UAPI_LINUX_KERNEL_H
- 
-+#if defined(__KERNEL__) || defined( __GLIBC__)
- #include <linux/sysinfo.h>
-+#endif
- 
- /*
-  * 'kernel.h' contains some often-used function prototypes etc
diff --git a/target/linux/generic/pending-3.18/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch b/target/linux/generic/pending-3.18/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
new file mode 100644
index 0000000000..67895995b2
--- /dev/null
+++ b/target/linux/generic/pending-3.18/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
@@ -0,0 +1,102 @@
+From c6bdd0d302119819de72439972d0462c26ef9eda Mon Sep 17 00:00:00 2001
+From: Felix Janda <felix.janda@posteo.de>
+Date: Sun, 12 Nov 2017 13:30:17 -0500
+Subject: uapi libc compat: add fallback for unsupported libcs
+
+libc-compat.h aims to prevent symbol collisions between uapi and libc
+headers for each supported libc. This requires continuous coordination
+between them.
+
+The goal of this commit is to improve the situation for libcs (such as
+musl) which are not yet supported and/or do not wish to be explicitly
+supported, while not affecting supported libcs. More precisely, with
+this commit, unsupported libcs can request the suppression of any
+specific uapi definition by defining the correspondings _UAPI_DEF_*
+macro as 0. This can fix symbol collisions for them, as long as the
+libc headers are included before the uapi headers. Inclusion in the
+other order is outside the scope of this commit.
+
+All infrastructure in order to enable this fallback for unsupported
+libcs is already in place, except that libc-compat.h unconditionally
+defines all _UAPI_DEF_* macros to 1 for all unsupported libcs so that
+any previous definitions are ignored. In order to fix this, this commit
+merely makes these definitions conditional.
+
+This commit together with the musl libc commit
+
+http://git.musl-libc.org/cgit/musl/commit/?id=04983f2272382af92eb8f8838964ff944fbb8258
+
+fixes for example the following compiler errors when <linux/in6.h> is
+included after musl's <netinet/in.h>:
+
+./linux/in6.h:32:8: error: redefinition of 'struct in6_addr'
+./linux/in6.h:49:8: error: redefinition of 'struct sockaddr_in6'
+./linux/in6.h:59:8: error: redefinition of 'struct ipv6_mreq'
+
+The comments referencing glibc are still correct, but this file is not
+only used for glibc any more.
+
+Signed-off-by: Felix Janda <felix.janda@posteo.de>
+Reviewed-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/libc-compat.h | 55 +++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 54 insertions(+), 1 deletion(-)
+
+--- a/include/uapi/linux/libc-compat.h
++++ b/include/uapi/linux/libc-compat.h
+@@ -110,27 +110,54 @@
+ 
+ /* If we did not see any headers from any supported C libraries,
+  * or we are being included in the kernel, then define everything
+- * that we need. */
++ * that we need. Check for previous __UAPI_* definitions to give
++ * unsupported C libraries a way to opt out of any kernel definition. */
+ #else /* !defined(__GLIBC__) */
+ 
+ /* Definitions for in.h */
++#ifndef __UAPI_DEF_IN_ADDR
+ #define __UAPI_DEF_IN_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN_IPPROTO
+ #define __UAPI_DEF_IN_IPPROTO		1
++#endif
++#ifndef __UAPI_DEF_IN_PKTINFO
+ #define __UAPI_DEF_IN_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP_MREQ
+ #define __UAPI_DEF_IP_MREQ		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN
+ #define __UAPI_DEF_SOCKADDR_IN		1
++#endif
++#ifndef __UAPI_DEF_IN_CLASS
+ #define __UAPI_DEF_IN_CLASS		1
++#endif
+ 
+ /* Definitions for in6.h */
++#ifndef __UAPI_DEF_IN6_ADDR
+ #define __UAPI_DEF_IN6_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN6_ADDR_ALT
+ #define __UAPI_DEF_IN6_ADDR_ALT		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN6
+ #define __UAPI_DEF_SOCKADDR_IN6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_MREQ
+ #define __UAPI_DEF_IPV6_MREQ		1
++#endif
++#ifndef __UAPI_DEF_IPPROTO_V6
+ #define __UAPI_DEF_IPPROTO_V6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_OPTIONS
+ #define __UAPI_DEF_IPV6_OPTIONS		1
++#endif
+ 
+ /* Definitions for xattr.h */
++#ifndef __UAPI_DEF_XATTR
+ #define __UAPI_DEF_XATTR		1
++#endif
+ 
+ #endif /* __GLIBC__ */
+ 
diff --git a/target/linux/generic/pending-3.18/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch b/target/linux/generic/pending-3.18/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
deleted file mode 100644
index 891299ead1..0000000000
--- a/target/linux/generic/pending-3.18/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
+++ /dev/null
@@ -1,81 +0,0 @@
-From f972afc2509eebcb00d370256c55b112a3b5ffca Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Date: Mon, 29 Jun 2015 16:50:40 +0200
-Subject: [PATCH 2/3] uapi/libc-compat.h: do not rely on __GLIBC__
-
-Musl provides the same structs as glibc, but does not provide a define to
-allow its detection. Since the absence of __GLIBC__ also can mean that it
-is included from the kernel, change the __GLIBC__ detection to
-!__KERNEL__, which should always be true when included from userspace.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/libc-compat.h | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
-
---- a/include/uapi/linux/libc-compat.h
-+++ b/include/uapi/linux/libc-compat.h
-@@ -48,13 +48,13 @@
- #ifndef _UAPI_LIBC_COMPAT_H
- #define _UAPI_LIBC_COMPAT_H
- 
--/* We have included glibc headers... */
--#if defined(__GLIBC__)
-+/* We have included libc headers... */
-+#if !defined(__KERNEL__)
- 
--/* Coordinate with glibc netinet/in.h header. */
-+/* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- #define __UAPI_DEF_IN_ADDR		0
- #define __UAPI_DEF_IN_IPPROTO		0
-@@ -68,7 +68,7 @@
-  * if the glibc code didn't define them. This guard matches
-  * the guard in glibc/inet/netinet/in.h which defines the
-  * additional in6_addr macros e.g. s6_addr16, and s6_addr32. */
--#if defined(__USE_MISC) || defined (__USE_GNU)
-+#if !defined(__GLIBC__) || defined(__USE_MISC) || defined (__USE_GNU)
- #define __UAPI_DEF_IN6_ADDR_ALT		0
- #else
- #define __UAPI_DEF_IN6_ADDR_ALT		1
-@@ -81,7 +81,7 @@
- #else
- 
- /* Linux headers included first, and we must define everything
-- * we need. The expectation is that glibc will check the
-+ * we need. The expectation is that the libc will check the
-  * __UAPI_DEF_* defines and adjust appropriately. */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
-@@ -91,7 +91,7 @@
- #define __UAPI_DEF_IN_CLASS		1
- 
- #define __UAPI_DEF_IN6_ADDR		1
--/* We unconditionally define the in6_addr macros and glibc must
-+/* We unconditionally define the in6_addr macros and the libc must
-  * coordinate. */
- #define __UAPI_DEF_IN6_ADDR_ALT		1
- #define __UAPI_DEF_SOCKADDR_IN6		1
-@@ -111,7 +111,7 @@
- /* If we did not see any headers from any supported C libraries,
-  * or we are being included in the kernel, then define everything
-  * that we need. */
--#else /* !defined(__GLIBC__) */
-+#else /* defined(__KERNEL__) */
- 
- /* Definitions for in.h */
- #define __UAPI_DEF_IN_ADDR		1
-@@ -132,6 +132,6 @@
- /* Definitions for xattr.h */
- #define __UAPI_DEF_XATTR		1
- 
--#endif /* __GLIBC__ */
-+#endif /* __KERNEL__ */
- 
- #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-3.18/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch b/target/linux/generic/pending-3.18/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
index feea4c31c6..10d698f961 100644
--- a/target/linux/generic/pending-3.18/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
+++ b/target/linux/generic/pending-3.18/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
@@ -1,18 +1,20 @@
-From fcbb6fed85ea9ff4feb4f1ebd4f0f235fdaf06b6 Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
+From 649affd04813c43e0a72886517fcfccd63230981 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
 Date: Mon, 29 Jun 2015 16:53:03 +0200
-Subject: [PATCH 3/3] uapi/if_ether.h: prevent redefinition of struct ethhdr
+Subject: uapi/if_ether.h: prevent redefinition of struct ethhdr
 
 Musl provides its own ethhdr struct definition. Add a guard to prevent
 its definition of the appropriate musl header has already been included.
 
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+glibc does not implement this header, but when glibc will implement this
+they can just define __UAPI_DEF_ETHHDR 0 to make it work with the
+kernel.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 ---
- include/uapi/linux/if_ether.h    |  3 +++
- include/uapi/linux/libc-compat.h | 11 +++++++++++
- 2 files changed, 14 insertions(+)
+ include/uapi/linux/if_ether.h    | 3 +++
+ include/uapi/linux/libc-compat.h | 6 ++++++
+ 2 files changed, 9 insertions(+)
 
 --- a/include/uapi/linux/if_ether.h
 +++ b/include/uapi/linux/if_ether.h
@@ -40,28 +42,14 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  #endif /* _UAPI_LINUX_IF_ETHER_H */
 --- a/include/uapi/linux/libc-compat.h
 +++ b/include/uapi/linux/libc-compat.h
-@@ -51,6 +51,14 @@
- /* We have included libc headers... */
- #if !defined(__KERNEL__)
+@@ -161,4 +161,10 @@
  
-+/* musl defines the ethhdr struct itself in its netinet/if_ether.h.
-+ * Glibc just includes the kernel header and uses a different guard. */
-+#if defined(_NETINET_IF_ETHER_H)
-+#define __UAPI_DEF_ETHHDR		0
-+#else
-+#define __UAPI_DEF_ETHHDR		1
-+#endif
-+
- /* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
-@@ -113,6 +121,9 @@
-  * that we need. */
- #else /* defined(__KERNEL__) */
+ #endif /* __GLIBC__ */
  
 +/* Definitions for if_ether.h */
-+#define __UAPI_DEF_ETHHDR 		1
++/* allow libcs like musl to deactivate this, glibc does not implement this. */
++#ifndef __UAPI_DEF_ETHHDR
++#define __UAPI_DEF_ETHHDR		1
++#endif
 +
- /* Definitions for in.h */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
+ #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-4.14/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch b/target/linux/generic/pending-4.14/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
deleted file mode 100644
index 9ec8daf886..0000000000
--- a/target/linux/generic/pending-4.14/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
+++ /dev/null
@@ -1,32 +0,0 @@
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Subject: uapi/kernel.h: glibc specific inclusion of sysinfo.h
-
-including sysinfo.h from kernel.h makes no sense whatsoever,
-but removing it breaks glibc's userspace header,
-which includes kernel.h instead of sysinfo.h from their sys/sysinfo.h.
-this seems to be a historical mistake.
-on musl, including any header that uses kernel.h directly or indirectly
-plus sys/sysinfo.h will produce a compile error due to redefinition of
-struct sysinfo from sys/sysinfo.h.
-so for now, only include it on glibc or when including from kernel
-in order not to break their headers.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Signed-off-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/kernel.h | 2 ++
- 1 file changed, 2 insertions(+)
-
---- a/include/uapi/linux/kernel.h
-+++ b/include/uapi/linux/kernel.h
-@@ -2,7 +2,9 @@
- #ifndef _UAPI_LINUX_KERNEL_H
- #define _UAPI_LINUX_KERNEL_H
- 
-+#if defined(__KERNEL__) || defined( __GLIBC__)
- #include <linux/sysinfo.h>
-+#endif
- 
- /*
-  * 'kernel.h' contains some often-used function prototypes etc
diff --git a/target/linux/generic/pending-4.14/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch b/target/linux/generic/pending-4.14/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
new file mode 100644
index 0000000000..530a9e8a85
--- /dev/null
+++ b/target/linux/generic/pending-4.14/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
@@ -0,0 +1,147 @@
+From c6bdd0d302119819de72439972d0462c26ef9eda Mon Sep 17 00:00:00 2001
+From: Felix Janda <felix.janda@posteo.de>
+Date: Sun, 12 Nov 2017 13:30:17 -0500
+Subject: uapi libc compat: add fallback for unsupported libcs
+
+libc-compat.h aims to prevent symbol collisions between uapi and libc
+headers for each supported libc. This requires continuous coordination
+between them.
+
+The goal of this commit is to improve the situation for libcs (such as
+musl) which are not yet supported and/or do not wish to be explicitly
+supported, while not affecting supported libcs. More precisely, with
+this commit, unsupported libcs can request the suppression of any
+specific uapi definition by defining the correspondings _UAPI_DEF_*
+macro as 0. This can fix symbol collisions for them, as long as the
+libc headers are included before the uapi headers. Inclusion in the
+other order is outside the scope of this commit.
+
+All infrastructure in order to enable this fallback for unsupported
+libcs is already in place, except that libc-compat.h unconditionally
+defines all _UAPI_DEF_* macros to 1 for all unsupported libcs so that
+any previous definitions are ignored. In order to fix this, this commit
+merely makes these definitions conditional.
+
+This commit together with the musl libc commit
+
+http://git.musl-libc.org/cgit/musl/commit/?id=04983f2272382af92eb8f8838964ff944fbb8258
+
+fixes for example the following compiler errors when <linux/in6.h> is
+included after musl's <netinet/in.h>:
+
+./linux/in6.h:32:8: error: redefinition of 'struct in6_addr'
+./linux/in6.h:49:8: error: redefinition of 'struct sockaddr_in6'
+./linux/in6.h:59:8: error: redefinition of 'struct ipv6_mreq'
+
+The comments referencing glibc are still correct, but this file is not
+only used for glibc any more.
+
+Signed-off-by: Felix Janda <felix.janda@posteo.de>
+Reviewed-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/libc-compat.h | 55 +++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 54 insertions(+), 1 deletion(-)
+
+--- a/include/uapi/linux/libc-compat.h
++++ b/include/uapi/linux/libc-compat.h
+@@ -168,46 +168,99 @@
+ 
+ /* If we did not see any headers from any supported C libraries,
+  * or we are being included in the kernel, then define everything
+- * that we need. */
++ * that we need. Check for previous __UAPI_* definitions to give
++ * unsupported C libraries a way to opt out of any kernel definition. */
+ #else /* !defined(__GLIBC__) */
+ 
+ /* Definitions for if.h */
++#ifndef __UAPI_DEF_IF_IFCONF
+ #define __UAPI_DEF_IF_IFCONF 1
++#endif
++#ifndef __UAPI_DEF_IF_IFMAP
+ #define __UAPI_DEF_IF_IFMAP 1
++#endif
++#ifndef __UAPI_DEF_IF_IFNAMSIZ
+ #define __UAPI_DEF_IF_IFNAMSIZ 1
++#endif
++#ifndef __UAPI_DEF_IF_IFREQ
+ #define __UAPI_DEF_IF_IFREQ 1
++#endif
+ /* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 1
++#endif
+ /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
++#endif
+ 
+ /* Definitions for in.h */
++#ifndef __UAPI_DEF_IN_ADDR
+ #define __UAPI_DEF_IN_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN_IPPROTO
+ #define __UAPI_DEF_IN_IPPROTO		1
++#endif
++#ifndef __UAPI_DEF_IN_PKTINFO
+ #define __UAPI_DEF_IN_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP_MREQ
+ #define __UAPI_DEF_IP_MREQ		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN
+ #define __UAPI_DEF_SOCKADDR_IN		1
++#endif
++#ifndef __UAPI_DEF_IN_CLASS
+ #define __UAPI_DEF_IN_CLASS		1
++#endif
+ 
+ /* Definitions for in6.h */
++#ifndef __UAPI_DEF_IN6_ADDR
+ #define __UAPI_DEF_IN6_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN6_ADDR_ALT
+ #define __UAPI_DEF_IN6_ADDR_ALT		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN6
+ #define __UAPI_DEF_SOCKADDR_IN6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_MREQ
+ #define __UAPI_DEF_IPV6_MREQ		1
++#endif
++#ifndef __UAPI_DEF_IPPROTO_V6
+ #define __UAPI_DEF_IPPROTO_V6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_OPTIONS
+ #define __UAPI_DEF_IPV6_OPTIONS		1
++#endif
++#ifndef __UAPI_DEF_IN6_PKTINFO
+ #define __UAPI_DEF_IN6_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP6_MTUINFO
+ #define __UAPI_DEF_IP6_MTUINFO		1
++#endif
+ 
+ /* Definitions for ipx.h */
++#ifndef __UAPI_DEF_SOCKADDR_IPX
+ #define __UAPI_DEF_SOCKADDR_IPX			1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEFINITION
+ #define __UAPI_DEF_IPX_ROUTE_DEFINITION		1
++#endif
++#ifndef __UAPI_DEF_IPX_INTERFACE_DEFINITION
+ #define __UAPI_DEF_IPX_INTERFACE_DEFINITION	1
++#endif
++#ifndef __UAPI_DEF_IPX_CONFIG_DATA
+ #define __UAPI_DEF_IPX_CONFIG_DATA		1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEF
+ #define __UAPI_DEF_IPX_ROUTE_DEF		1
++#endif
+ 
+ /* Definitions for xattr.h */
++#ifndef __UAPI_DEF_XATTR
+ #define __UAPI_DEF_XATTR		1
++#endif
+ 
+ #endif /* __GLIBC__ */
+ 
diff --git a/target/linux/generic/pending-4.14/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch b/target/linux/generic/pending-4.14/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
deleted file mode 100644
index 9ae148da4f..0000000000
--- a/target/linux/generic/pending-4.14/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
+++ /dev/null
@@ -1,105 +0,0 @@
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Subject: uapi/libc-compat.h: do not rely on __GLIBC__
-
-Musl provides the same structs as glibc, but does not provide a define to
-allow its detection. Since the absence of __GLIBC__ also can mean that it
-is included from the kernel, change the __GLIBC__ detection to
-!__KERNEL__, which should always be true when included from userspace.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/libc-compat.h | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
-
---- a/include/uapi/linux/libc-compat.h
-+++ b/include/uapi/linux/libc-compat.h
-@@ -49,13 +49,13 @@
- #ifndef _UAPI_LIBC_COMPAT_H
- #define _UAPI_LIBC_COMPAT_H
- 
--/* We have included glibc headers... */
--#if defined(__GLIBC__)
-+/* We have included libc headers... */
-+#if !defined(__KERNEL__)
- 
--/* Coordinate with glibc net/if.h header. */
--#if defined(_NET_IF_H) && defined(__USE_MISC)
-+/* Coordinate with libc net/if.h header. */
-+#if defined(_NET_IF_H) && (!defined(__GLIBC__) || defined(__USE_MISC))
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- 
- #define __UAPI_DEF_IF_IFCONF 0
-@@ -66,7 +66,11 @@
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 0
- /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
- #ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
-+#ifdef __GLIBC__
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
-+#else
-+#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0
-+#endif
- #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
- 
- #else /* _NET_IF_H */
-@@ -86,10 +90,10 @@
- 
- #endif /* _NET_IF_H */
- 
--/* Coordinate with glibc netinet/in.h header. */
-+/* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- #define __UAPI_DEF_IN_ADDR		0
- #define __UAPI_DEF_IN_IPPROTO		0
-@@ -103,7 +107,7 @@
-  * if the glibc code didn't define them. This guard matches
-  * the guard in glibc/inet/netinet/in.h which defines the
-  * additional in6_addr macros e.g. s6_addr16, and s6_addr32. */
--#if defined(__USE_MISC) || defined (__USE_GNU)
-+#if !defined(__GLIBC__) || defined(__USE_MISC) || defined (__USE_GNU)
- #define __UAPI_DEF_IN6_ADDR_ALT		0
- #else
- #define __UAPI_DEF_IN6_ADDR_ALT		1
-@@ -118,7 +122,7 @@
- #else
- 
- /* Linux headers included first, and we must define everything
-- * we need. The expectation is that glibc will check the
-+ * we need. The expectation is that the libc will check the
-  * __UAPI_DEF_* defines and adjust appropriately. */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
-@@ -128,7 +132,7 @@
- #define __UAPI_DEF_IN_CLASS		1
- 
- #define __UAPI_DEF_IN6_ADDR		1
--/* We unconditionally define the in6_addr macros and glibc must
-+/* We unconditionally define the in6_addr macros and the libc must
-  * coordinate. */
- #define __UAPI_DEF_IN6_ADDR_ALT		1
- #define __UAPI_DEF_SOCKADDR_IN6		1
-@@ -169,7 +173,7 @@
- /* If we did not see any headers from any supported C libraries,
-  * or we are being included in the kernel, then define everything
-  * that we need. */
--#else /* !defined(__GLIBC__) */
-+#else /* defined(__KERNEL__) */
- 
- /* Definitions for if.h */
- #define __UAPI_DEF_IF_IFCONF 1
-@@ -209,6 +213,6 @@
- /* Definitions for xattr.h */
- #define __UAPI_DEF_XATTR		1
- 
--#endif /* __GLIBC__ */
-+#endif /* __KERNEL__ */
- 
- #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-4.14/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch b/target/linux/generic/pending-4.14/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
index 1dca07328d..784c548c81 100644
--- a/target/linux/generic/pending-4.14/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
+++ b/target/linux/generic/pending-4.14/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
@@ -1,16 +1,20 @@
-From: David Heidelberger <david.heidelberger@ixit.cz>
+From 649affd04813c43e0a72886517fcfccd63230981 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Mon, 29 Jun 2015 16:53:03 +0200
 Subject: uapi/if_ether.h: prevent redefinition of struct ethhdr
 
 Musl provides its own ethhdr struct definition. Add a guard to prevent
 its definition of the appropriate musl header has already been included.
 
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+glibc does not implement this header, but when glibc will implement this
+they can just define __UAPI_DEF_ETHHDR 0 to make it work with the
+kernel.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 ---
- include/uapi/linux/if_ether.h    |  3 +++
- include/uapi/linux/libc-compat.h | 11 +++++++++++
- 2 files changed, 14 insertions(+)
+ include/uapi/linux/if_ether.h    | 3 +++
+ include/uapi/linux/libc-compat.h | 6 ++++++
+ 2 files changed, 9 insertions(+)
 
 --- a/include/uapi/linux/if_ether.h
 +++ b/include/uapi/linux/if_ether.h
@@ -38,28 +42,14 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  #endif /* _UAPI_LINUX_IF_ETHER_H */
 --- a/include/uapi/linux/libc-compat.h
 +++ b/include/uapi/linux/libc-compat.h
-@@ -90,6 +90,14 @@
+@@ -264,4 +264,10 @@
  
- #endif /* _NET_IF_H */
+ #endif /* __GLIBC__ */
  
-+/* musl defines the ethhdr struct itself in its netinet/if_ether.h.
-+ * Glibc just includes the kernel header and uses a different guard. */
-+#if defined(_NETINET_IF_ETHER_H)
-+#define __UAPI_DEF_ETHHDR		0
-+#else
++/* Definitions for if_ether.h */
++/* allow libcs like musl to deactivate this, glibc does not implement this. */
++#ifndef __UAPI_DEF_ETHHDR
 +#define __UAPI_DEF_ETHHDR		1
 +#endif
 +
- /* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
-@@ -185,6 +193,9 @@
- /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
- 
-+/* Definitions for if_ether.h */
-+#define __UAPI_DEF_ETHHDR 		1
-+
- /* Definitions for in.h */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
+ #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-4.4/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch b/target/linux/generic/pending-4.4/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
deleted file mode 100644
index 762f4989b6..0000000000
--- a/target/linux/generic/pending-4.4/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
+++ /dev/null
@@ -1,34 +0,0 @@
-From 8b05e325824d3b38e52a7748b3b5dc34dc1c0f6d Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Date: Mon, 29 Jun 2015 14:37:54 +0200
-Subject: [PATCH 1/3] uapi/kernel.h: glibc specific inclusion of sysinfo.h
-
-including sysinfo.h from kernel.h makes no sense whatsoever,
-but removing it breaks glibc's userspace header,
-which includes kernel.h instead of sysinfo.h from their sys/sysinfo.h.
-this seems to be a historical mistake.
-on musl, including any header that uses kernel.h directly or indirectly
-plus sys/sysinfo.h will produce a compile error due to redefinition of
-struct sysinfo from sys/sysinfo.h.
-so for now, only include it on glibc or when including from kernel
-in order not to break their headers.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Signed-off-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/kernel.h | 2 ++
- 1 file changed, 2 insertions(+)
-
---- a/include/uapi/linux/kernel.h
-+++ b/include/uapi/linux/kernel.h
-@@ -1,7 +1,9 @@
- #ifndef _UAPI_LINUX_KERNEL_H
- #define _UAPI_LINUX_KERNEL_H
- 
-+#if defined(__KERNEL__) || defined( __GLIBC__)
- #include <linux/sysinfo.h>
-+#endif
- 
- /*
-  * 'kernel.h' contains some often-used function prototypes etc
diff --git a/target/linux/generic/pending-4.4/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch b/target/linux/generic/pending-4.4/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
new file mode 100644
index 0000000000..06ad9bba9d
--- /dev/null
+++ b/target/linux/generic/pending-4.4/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
@@ -0,0 +1,130 @@
+From c6bdd0d302119819de72439972d0462c26ef9eda Mon Sep 17 00:00:00 2001
+From: Felix Janda <felix.janda@posteo.de>
+Date: Sun, 12 Nov 2017 13:30:17 -0500
+Subject: uapi libc compat: add fallback for unsupported libcs
+
+libc-compat.h aims to prevent symbol collisions between uapi and libc
+headers for each supported libc. This requires continuous coordination
+between them.
+
+The goal of this commit is to improve the situation for libcs (such as
+musl) which are not yet supported and/or do not wish to be explicitly
+supported, while not affecting supported libcs. More precisely, with
+this commit, unsupported libcs can request the suppression of any
+specific uapi definition by defining the correspondings _UAPI_DEF_*
+macro as 0. This can fix symbol collisions for them, as long as the
+libc headers are included before the uapi headers. Inclusion in the
+other order is outside the scope of this commit.
+
+All infrastructure in order to enable this fallback for unsupported
+libcs is already in place, except that libc-compat.h unconditionally
+defines all _UAPI_DEF_* macros to 1 for all unsupported libcs so that
+any previous definitions are ignored. In order to fix this, this commit
+merely makes these definitions conditional.
+
+This commit together with the musl libc commit
+
+http://git.musl-libc.org/cgit/musl/commit/?id=04983f2272382af92eb8f8838964ff944fbb8258
+
+fixes for example the following compiler errors when <linux/in6.h> is
+included after musl's <netinet/in.h>:
+
+./linux/in6.h:32:8: error: redefinition of 'struct in6_addr'
+./linux/in6.h:49:8: error: redefinition of 'struct sockaddr_in6'
+./linux/in6.h:59:8: error: redefinition of 'struct ipv6_mreq'
+
+The comments referencing glibc are still correct, but this file is not
+only used for glibc any more.
+
+Signed-off-by: Felix Janda <felix.janda@posteo.de>
+Reviewed-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/libc-compat.h | 55 +++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 54 insertions(+), 1 deletion(-)
+
+--- a/include/uapi/linux/libc-compat.h
++++ b/include/uapi/linux/libc-compat.h
+@@ -148,39 +148,82 @@
+ 
+ /* If we did not see any headers from any supported C libraries,
+  * or we are being included in the kernel, then define everything
+- * that we need. */
++ * that we need. Check for previous __UAPI_* definitions to give
++ * unsupported C libraries a way to opt out of any kernel definition. */
+ #else /* !defined(__GLIBC__) */
+ 
+ /* Definitions for if.h */
++#ifndef __UAPI_DEF_IF_IFCONF
+ #define __UAPI_DEF_IF_IFCONF 1
++#endif
++#ifndef __UAPI_DEF_IF_IFMAP
+ #define __UAPI_DEF_IF_IFMAP 1
++#endif
++#ifndef __UAPI_DEF_IF_IFNAMSIZ
+ #define __UAPI_DEF_IF_IFNAMSIZ 1
++#endif
++#ifndef __UAPI_DEF_IF_IFREQ
+ #define __UAPI_DEF_IF_IFREQ 1
++#endif
+ /* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 1
++#endif
+ /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
++#endif
+ 
+ /* Definitions for in.h */
++#ifndef __UAPI_DEF_IN_ADDR
+ #define __UAPI_DEF_IN_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN_IPPROTO
+ #define __UAPI_DEF_IN_IPPROTO		1
++#endif
++#ifndef __UAPI_DEF_IN_PKTINFO
+ #define __UAPI_DEF_IN_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP_MREQ
+ #define __UAPI_DEF_IP_MREQ		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN
+ #define __UAPI_DEF_SOCKADDR_IN		1
++#endif
++#ifndef __UAPI_DEF_IN_CLASS
+ #define __UAPI_DEF_IN_CLASS		1
++#endif
+ 
+ /* Definitions for in6.h */
++#ifndef __UAPI_DEF_IN6_ADDR
+ #define __UAPI_DEF_IN6_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN6_ADDR_ALT
+ #define __UAPI_DEF_IN6_ADDR_ALT		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN6
+ #define __UAPI_DEF_SOCKADDR_IN6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_MREQ
+ #define __UAPI_DEF_IPV6_MREQ		1
++#endif
++#ifndef __UAPI_DEF_IPPROTO_V6
+ #define __UAPI_DEF_IPPROTO_V6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_OPTIONS
+ #define __UAPI_DEF_IPV6_OPTIONS		1
++#endif
++#ifndef __UAPI_DEF_IN6_PKTINFO
+ #define __UAPI_DEF_IN6_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP6_MTUINFO
+ #define __UAPI_DEF_IP6_MTUINFO		1
++#endif
+ 
+ /* Definitions for xattr.h */
++#ifndef __UAPI_DEF_XATTR
+ #define __UAPI_DEF_XATTR		1
++#endif
+ 
+ #endif /* __GLIBC__ */
+ 
diff --git a/target/linux/generic/pending-4.4/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch b/target/linux/generic/pending-4.4/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
deleted file mode 100644
index 2a29535eed..0000000000
--- a/target/linux/generic/pending-4.4/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
+++ /dev/null
@@ -1,94 +0,0 @@
-From f972afc2509eebcb00d370256c55b112a3b5ffca Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Date: Mon, 29 Jun 2015 16:50:40 +0200
-Subject: [PATCH 2/3] uapi/libc-compat.h: do not rely on __GLIBC__
-
-Musl provides the same structs as glibc, but does not provide a define to
-allow its detection. Since the absence of __GLIBC__ also can mean that it
-is included from the kernel, change the __GLIBC__ detection to
-!__KERNEL__, which should always be true when included from userspace.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/libc-compat.h | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
-
---- a/include/uapi/linux/libc-compat.h
-+++ b/include/uapi/linux/libc-compat.h
-@@ -48,13 +48,13 @@
- #ifndef _UAPI_LIBC_COMPAT_H
- #define _UAPI_LIBC_COMPAT_H
- 
--/* We have included glibc headers... */
--#if defined(__GLIBC__)
-+/* We have included libc headers... */
-+#if !defined(__KERNEL__)
- 
--/* Coordinate with glibc net/if.h header. */
-+/* Coordinate with libc net/if.h header. */
- #if defined(_NET_IF_H) && defined(__USE_MISC)
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- 
- #define __UAPI_DEF_IF_IFCONF 0
-@@ -85,10 +85,10 @@
- 
- #endif /* _NET_IF_H */
- 
--/* Coordinate with glibc netinet/in.h header. */
-+/* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- #define __UAPI_DEF_IN_ADDR		0
- #define __UAPI_DEF_IN_IPPROTO		0
-@@ -102,7 +102,7 @@
-  * if the glibc code didn't define them. This guard matches
-  * the guard in glibc/inet/netinet/in.h which defines the
-  * additional in6_addr macros e.g. s6_addr16, and s6_addr32. */
--#if defined(__USE_MISC) || defined (__USE_GNU)
-+#if !defined(__GLIBC__) || defined(__USE_MISC) || defined (__USE_GNU)
- #define __UAPI_DEF_IN6_ADDR_ALT		0
- #else
- #define __UAPI_DEF_IN6_ADDR_ALT		1
-@@ -117,7 +117,7 @@
- #else
- 
- /* Linux headers included first, and we must define everything
-- * we need. The expectation is that glibc will check the
-+ * we need. The expectation is that the libc will check the
-  * __UAPI_DEF_* defines and adjust appropriately. */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
-@@ -127,7 +127,7 @@
- #define __UAPI_DEF_IN_CLASS		1
- 
- #define __UAPI_DEF_IN6_ADDR		1
--/* We unconditionally define the in6_addr macros and glibc must
-+/* We unconditionally define the in6_addr macros and the libc must
-  * coordinate. */
- #define __UAPI_DEF_IN6_ADDR_ALT		1
- #define __UAPI_DEF_SOCKADDR_IN6		1
-@@ -149,7 +149,7 @@
- /* If we did not see any headers from any supported C libraries,
-  * or we are being included in the kernel, then define everything
-  * that we need. */
--#else /* !defined(__GLIBC__) */
-+#else /* defined(__KERNEL__) */
- 
- /* Definitions for if.h */
- #define __UAPI_DEF_IF_IFCONF 1
-@@ -182,6 +182,6 @@
- /* Definitions for xattr.h */
- #define __UAPI_DEF_XATTR		1
- 
--#endif /* __GLIBC__ */
-+#endif /* __KERNEL__ */
- 
- #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-4.4/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch b/target/linux/generic/pending-4.4/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
index 9065369040..21494b9256 100644
--- a/target/linux/generic/pending-4.4/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
+++ b/target/linux/generic/pending-4.4/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
@@ -1,18 +1,20 @@
-From fcbb6fed85ea9ff4feb4f1ebd4f0f235fdaf06b6 Mon Sep 17 00:00:00 2001
-From: David Heidelberger <david.heidelberger@ixit.cz>
+From 649affd04813c43e0a72886517fcfccd63230981 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
 Date: Mon, 29 Jun 2015 16:53:03 +0200
-Subject: [PATCH 3/3] uapi/if_ether.h: prevent redefinition of struct ethhdr
+Subject: uapi/if_ether.h: prevent redefinition of struct ethhdr
 
 Musl provides its own ethhdr struct definition. Add a guard to prevent
 its definition of the appropriate musl header has already been included.
 
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+glibc does not implement this header, but when glibc will implement this
+they can just define __UAPI_DEF_ETHHDR 0 to make it work with the
+kernel.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 ---
- include/uapi/linux/if_ether.h    |  3 +++
- include/uapi/linux/libc-compat.h | 11 +++++++++++
- 2 files changed, 14 insertions(+)
+ include/uapi/linux/if_ether.h    | 3 +++
+ include/uapi/linux/libc-compat.h | 6 ++++++
+ 2 files changed, 9 insertions(+)
 
 --- a/include/uapi/linux/if_ether.h
 +++ b/include/uapi/linux/if_ether.h
@@ -40,28 +42,14 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  #endif /* _UAPI_LINUX_IF_ETHER_H */
 --- a/include/uapi/linux/libc-compat.h
 +++ b/include/uapi/linux/libc-compat.h
-@@ -85,6 +85,14 @@
+@@ -227,4 +227,10 @@
  
- #endif /* _NET_IF_H */
+ #endif /* __GLIBC__ */
  
-+/* musl defines the ethhdr struct itself in its netinet/if_ether.h.
-+ * Glibc just includes the kernel header and uses a different guard. */
-+#if defined(_NETINET_IF_ETHER_H)
-+#define __UAPI_DEF_ETHHDR		0
-+#else
++/* Definitions for if_ether.h */
++/* allow libcs like musl to deactivate this, glibc does not implement this. */
++#ifndef __UAPI_DEF_ETHHDR
 +#define __UAPI_DEF_ETHHDR		1
 +#endif
 +
- /* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
-@@ -161,6 +169,9 @@
- /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
- 
-+/* Definitions for if_ether.h */
-+#define __UAPI_DEF_ETHHDR 		1
-+
- /* Definitions for in.h */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
+ #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-4.9/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch b/target/linux/generic/pending-4.9/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
deleted file mode 100644
index 9c30fa81bf..0000000000
--- a/target/linux/generic/pending-4.9/270-uapi-kernel.h-glibc-specific-inclusion-of-sysinfo.h.patch
+++ /dev/null
@@ -1,32 +0,0 @@
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Subject: uapi/kernel.h: glibc specific inclusion of sysinfo.h
-
-including sysinfo.h from kernel.h makes no sense whatsoever,
-but removing it breaks glibc's userspace header,
-which includes kernel.h instead of sysinfo.h from their sys/sysinfo.h.
-this seems to be a historical mistake.
-on musl, including any header that uses kernel.h directly or indirectly
-plus sys/sysinfo.h will produce a compile error due to redefinition of
-struct sysinfo from sys/sysinfo.h.
-so for now, only include it on glibc or when including from kernel
-in order not to break their headers.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Signed-off-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/kernel.h | 2 ++
- 1 file changed, 2 insertions(+)
-
---- a/include/uapi/linux/kernel.h
-+++ b/include/uapi/linux/kernel.h
-@@ -1,7 +1,9 @@
- #ifndef _UAPI_LINUX_KERNEL_H
- #define _UAPI_LINUX_KERNEL_H
- 
-+#if defined(__KERNEL__) || defined( __GLIBC__)
- #include <linux/sysinfo.h>
-+#endif
- 
- /*
-  * 'kernel.h' contains some often-used function prototypes etc
diff --git a/target/linux/generic/pending-4.9/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch b/target/linux/generic/pending-4.9/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
new file mode 100644
index 0000000000..7b82bed535
--- /dev/null
+++ b/target/linux/generic/pending-4.9/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
@@ -0,0 +1,147 @@
+From c6bdd0d302119819de72439972d0462c26ef9eda Mon Sep 17 00:00:00 2001
+From: Felix Janda <felix.janda@posteo.de>
+Date: Sun, 12 Nov 2017 13:30:17 -0500
+Subject: uapi libc compat: add fallback for unsupported libcs
+
+libc-compat.h aims to prevent symbol collisions between uapi and libc
+headers for each supported libc. This requires continuous coordination
+between them.
+
+The goal of this commit is to improve the situation for libcs (such as
+musl) which are not yet supported and/or do not wish to be explicitly
+supported, while not affecting supported libcs. More precisely, with
+this commit, unsupported libcs can request the suppression of any
+specific uapi definition by defining the correspondings _UAPI_DEF_*
+macro as 0. This can fix symbol collisions for them, as long as the
+libc headers are included before the uapi headers. Inclusion in the
+other order is outside the scope of this commit.
+
+All infrastructure in order to enable this fallback for unsupported
+libcs is already in place, except that libc-compat.h unconditionally
+defines all _UAPI_DEF_* macros to 1 for all unsupported libcs so that
+any previous definitions are ignored. In order to fix this, this commit
+merely makes these definitions conditional.
+
+This commit together with the musl libc commit
+
+http://git.musl-libc.org/cgit/musl/commit/?id=04983f2272382af92eb8f8838964ff944fbb8258
+
+fixes for example the following compiler errors when <linux/in6.h> is
+included after musl's <netinet/in.h>:
+
+./linux/in6.h:32:8: error: redefinition of 'struct in6_addr'
+./linux/in6.h:49:8: error: redefinition of 'struct sockaddr_in6'
+./linux/in6.h:59:8: error: redefinition of 'struct ipv6_mreq'
+
+The comments referencing glibc are still correct, but this file is not
+only used for glibc any more.
+
+Signed-off-by: Felix Janda <felix.janda@posteo.de>
+Reviewed-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/libc-compat.h | 55 +++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 54 insertions(+), 1 deletion(-)
+
+--- a/include/uapi/linux/libc-compat.h
++++ b/include/uapi/linux/libc-compat.h
+@@ -167,46 +167,99 @@
+ 
+ /* If we did not see any headers from any supported C libraries,
+  * or we are being included in the kernel, then define everything
+- * that we need. */
++ * that we need. Check for previous __UAPI_* definitions to give
++ * unsupported C libraries a way to opt out of any kernel definition. */
+ #else /* !defined(__GLIBC__) */
+ 
+ /* Definitions for if.h */
++#ifndef __UAPI_DEF_IF_IFCONF
+ #define __UAPI_DEF_IF_IFCONF 1
++#endif
++#ifndef __UAPI_DEF_IF_IFMAP
+ #define __UAPI_DEF_IF_IFMAP 1
++#endif
++#ifndef __UAPI_DEF_IF_IFNAMSIZ
+ #define __UAPI_DEF_IF_IFNAMSIZ 1
++#endif
++#ifndef __UAPI_DEF_IF_IFREQ
+ #define __UAPI_DEF_IF_IFREQ 1
++#endif
+ /* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 1
++#endif
+ /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
++#endif
+ 
+ /* Definitions for in.h */
++#ifndef __UAPI_DEF_IN_ADDR
+ #define __UAPI_DEF_IN_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN_IPPROTO
+ #define __UAPI_DEF_IN_IPPROTO		1
++#endif
++#ifndef __UAPI_DEF_IN_PKTINFO
+ #define __UAPI_DEF_IN_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP_MREQ
+ #define __UAPI_DEF_IP_MREQ		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN
+ #define __UAPI_DEF_SOCKADDR_IN		1
++#endif
++#ifndef __UAPI_DEF_IN_CLASS
+ #define __UAPI_DEF_IN_CLASS		1
++#endif
+ 
+ /* Definitions for in6.h */
++#ifndef __UAPI_DEF_IN6_ADDR
+ #define __UAPI_DEF_IN6_ADDR		1
++#endif
++#ifndef __UAPI_DEF_IN6_ADDR_ALT
+ #define __UAPI_DEF_IN6_ADDR_ALT		1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN6
+ #define __UAPI_DEF_SOCKADDR_IN6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_MREQ
+ #define __UAPI_DEF_IPV6_MREQ		1
++#endif
++#ifndef __UAPI_DEF_IPPROTO_V6
+ #define __UAPI_DEF_IPPROTO_V6		1
++#endif
++#ifndef __UAPI_DEF_IPV6_OPTIONS
+ #define __UAPI_DEF_IPV6_OPTIONS		1
++#endif
++#ifndef __UAPI_DEF_IN6_PKTINFO
+ #define __UAPI_DEF_IN6_PKTINFO		1
++#endif
++#ifndef __UAPI_DEF_IP6_MTUINFO
+ #define __UAPI_DEF_IP6_MTUINFO		1
++#endif
+ 
+ /* Definitions for ipx.h */
++#ifndef __UAPI_DEF_SOCKADDR_IPX
+ #define __UAPI_DEF_SOCKADDR_IPX			1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEFINITION
+ #define __UAPI_DEF_IPX_ROUTE_DEFINITION		1
++#endif
++#ifndef __UAPI_DEF_IPX_INTERFACE_DEFINITION
+ #define __UAPI_DEF_IPX_INTERFACE_DEFINITION	1
++#endif
++#ifndef __UAPI_DEF_IPX_CONFIG_DATA
+ #define __UAPI_DEF_IPX_CONFIG_DATA		1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEF
+ #define __UAPI_DEF_IPX_ROUTE_DEF		1
++#endif
+ 
+ /* Definitions for xattr.h */
++#ifndef __UAPI_DEF_XATTR
+ #define __UAPI_DEF_XATTR		1
++#endif
+ 
+ #endif /* __GLIBC__ */
+ 
diff --git a/target/linux/generic/pending-4.9/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch b/target/linux/generic/pending-4.9/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
deleted file mode 100644
index a4aa1567e1..0000000000
--- a/target/linux/generic/pending-4.9/271-uapi-libc-compat.h-do-not-rely-on-__GLIBC__.patch
+++ /dev/null
@@ -1,105 +0,0 @@
-From: David Heidelberger <david.heidelberger@ixit.cz>
-Subject: uapi/libc-compat.h: do not rely on __GLIBC__
-
-Musl provides the same structs as glibc, but does not provide a define to
-allow its detection. Since the absence of __GLIBC__ also can mean that it
-is included from the kernel, change the __GLIBC__ detection to
-!__KERNEL__, which should always be true when included from userspace.
-
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- include/uapi/linux/libc-compat.h | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
-
---- a/include/uapi/linux/libc-compat.h
-+++ b/include/uapi/linux/libc-compat.h
-@@ -48,13 +48,13 @@
- #ifndef _UAPI_LIBC_COMPAT_H
- #define _UAPI_LIBC_COMPAT_H
- 
--/* We have included glibc headers... */
--#if defined(__GLIBC__)
-+/* We have included libc headers... */
-+#if !defined(__KERNEL__)
- 
--/* Coordinate with glibc net/if.h header. */
--#if defined(_NET_IF_H) && defined(__USE_MISC)
-+/* Coordinate with libc net/if.h header. */
-+#if defined(_NET_IF_H) && (!defined(__GLIBC__) || defined(__USE_MISC))
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- 
- #define __UAPI_DEF_IF_IFCONF 0
-@@ -65,7 +65,11 @@
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 0
- /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
- #ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
-+#ifdef __GLIBC__
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
-+#else
-+#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0
-+#endif
- #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
- 
- #else /* _NET_IF_H */
-@@ -85,10 +89,10 @@
- 
- #endif /* _NET_IF_H */
- 
--/* Coordinate with glibc netinet/in.h header. */
-+/* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
--/* GLIBC headers included first so don't define anything
-+/* LIBC headers included first so don't define anything
-  * that would already be defined. */
- #define __UAPI_DEF_IN_ADDR		0
- #define __UAPI_DEF_IN_IPPROTO		0
-@@ -102,7 +106,7 @@
-  * if the glibc code didn't define them. This guard matches
-  * the guard in glibc/inet/netinet/in.h which defines the
-  * additional in6_addr macros e.g. s6_addr16, and s6_addr32. */
--#if defined(__USE_MISC) || defined (__USE_GNU)
-+#if !defined(__GLIBC__) || defined(__USE_MISC) || defined (__USE_GNU)
- #define __UAPI_DEF_IN6_ADDR_ALT		0
- #else
- #define __UAPI_DEF_IN6_ADDR_ALT		1
-@@ -117,7 +121,7 @@
- #else
- 
- /* Linux headers included first, and we must define everything
-- * we need. The expectation is that glibc will check the
-+ * we need. The expectation is that the libc will check the
-  * __UAPI_DEF_* defines and adjust appropriately. */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
-@@ -127,7 +131,7 @@
- #define __UAPI_DEF_IN_CLASS		1
- 
- #define __UAPI_DEF_IN6_ADDR		1
--/* We unconditionally define the in6_addr macros and glibc must
-+/* We unconditionally define the in6_addr macros and the libc must
-  * coordinate. */
- #define __UAPI_DEF_IN6_ADDR_ALT		1
- #define __UAPI_DEF_SOCKADDR_IN6		1
-@@ -168,7 +172,7 @@
- /* If we did not see any headers from any supported C libraries,
-  * or we are being included in the kernel, then define everything
-  * that we need. */
--#else /* !defined(__GLIBC__) */
-+#else /* defined(__KERNEL__) */
- 
- /* Definitions for if.h */
- #define __UAPI_DEF_IF_IFCONF 1
-@@ -208,6 +212,6 @@
- /* Definitions for xattr.h */
- #define __UAPI_DEF_XATTR		1
- 
--#endif /* __GLIBC__ */
-+#endif /* __KERNEL__ */
- 
- #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/target/linux/generic/pending-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch b/target/linux/generic/pending-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
index 7b7b403ed0..38697021d5 100644
--- a/target/linux/generic/pending-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
+++ b/target/linux/generic/pending-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
@@ -1,16 +1,20 @@
-From: David Heidelberger <david.heidelberger@ixit.cz>
+From 649affd04813c43e0a72886517fcfccd63230981 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Mon, 29 Jun 2015 16:53:03 +0200
 Subject: uapi/if_ether.h: prevent redefinition of struct ethhdr
 
 Musl provides its own ethhdr struct definition. Add a guard to prevent
 its definition of the appropriate musl header has already been included.
 
-Signed-off-by: John Spencer <maillist-linux@barfooze.de>
-Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+glibc does not implement this header, but when glibc will implement this
+they can just define __UAPI_DEF_ETHHDR 0 to make it work with the
+kernel.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 ---
- include/uapi/linux/if_ether.h    |  3 +++
- include/uapi/linux/libc-compat.h | 11 +++++++++++
- 2 files changed, 14 insertions(+)
+ include/uapi/linux/if_ether.h    | 3 +++
+ include/uapi/linux/libc-compat.h | 6 ++++++
+ 2 files changed, 9 insertions(+)
 
 --- a/include/uapi/linux/if_ether.h
 +++ b/include/uapi/linux/if_ether.h
@@ -38,28 +42,14 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  #endif /* _UAPI_LINUX_IF_ETHER_H */
 --- a/include/uapi/linux/libc-compat.h
 +++ b/include/uapi/linux/libc-compat.h
-@@ -89,6 +89,14 @@
+@@ -263,4 +263,10 @@
  
- #endif /* _NET_IF_H */
+ #endif /* __GLIBC__ */
  
-+/* musl defines the ethhdr struct itself in its netinet/if_ether.h.
-+ * Glibc just includes the kernel header and uses a different guard. */
-+#if defined(_NETINET_IF_ETHER_H)
-+#define __UAPI_DEF_ETHHDR		0
-+#else
++/* Definitions for if_ether.h */
++/* allow libcs like musl to deactivate this, glibc does not implement this. */
++#ifndef __UAPI_DEF_ETHHDR
 +#define __UAPI_DEF_ETHHDR		1
 +#endif
 +
- /* Coordinate with libc netinet/in.h header. */
- #if defined(_NETINET_IN_H)
- 
-@@ -184,6 +192,9 @@
- /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
- #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
- 
-+/* Definitions for if_ether.h */
-+#define __UAPI_DEF_ETHHDR 		1
-+
- /* Definitions for in.h */
- #define __UAPI_DEF_IN_ADDR		1
- #define __UAPI_DEF_IN_IPPROTO		1
+ #endif /* _UAPI_LIBC_COMPAT_H */
diff --git a/toolchain/musl/patches/010-kernel-suppress-some-more-Linux-uapi-definitions.patch b/toolchain/musl/patches/010-kernel-suppress-some-more-Linux-uapi-definitions.patch
new file mode 100644
index 0000000000..c42c60eb96
--- /dev/null
+++ b/toolchain/musl/patches/010-kernel-suppress-some-more-Linux-uapi-definitions.patch
@@ -0,0 +1,60 @@
+From 7c854661394eea43328c8da43d07ecfcd3cefe15 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Fri, 4 Aug 2017 17:09:28 +0200
+Subject: kernel: suppress some more Linux uapi definitions
+
+The following commit activated the suppression of some uapi definitions
+in musl 04983f227238 ("make netinet/in.h suppress clashing definitions
+from kernel headers"), but it still misses some of the definitions for
+other files.
+
+This will deactivate the definitions in the user space header files
+exported by the Linux kernel.
+
+This fully works when Felix's patch posted here is applied to the Linux
+kernel:
+https://patchwork.kernel.org/patch/9869953/
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/net/if.h           | 7 +++++++
+ include/netinet/if_ether.h | 1 +
+ include/sys/xattr.h        | 2 ++
+ 3 files changed, 10 insertions(+)
+
+--- a/include/net/if.h
++++ b/include/net/if.h
+@@ -125,6 +125,13 @@ struct ifconf {
+ #define ifc_req		ifc_ifcu.ifcu_req
+ #define _IOT_ifconf _IOT(_IOTS(struct ifconf),1,0,0,0,0)
+ 
++#define __UAPI_DEF_IF_IFCONF 0
++#define __UAPI_DEF_IF_IFMAP 0
++#define __UAPI_DEF_IF_IFNAMSIZ 0
++#define __UAPI_DEF_IF_IFREQ 0
++#define __UAPI_DEF_IF_NET_DEVICE_FLAGS 0
++#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0
++
+ #endif
+ 
+ #ifdef __cplusplus
+--- a/include/netinet/if_ether.h
++++ b/include/netinet/if_ether.h
+@@ -133,5 +133,6 @@ do { \
+ 	(enaddr)[5] = ((uint8_t *)ipaddr)[3]; \
+ } while(0)
+ 
++#define __UAPI_DEF_ETHHDR 0
+ 
+ #endif
+--- a/include/sys/xattr.h
++++ b/include/sys/xattr.h
+@@ -24,6 +24,8 @@ int removexattr(const char *, const char
+ int lremovexattr(const char *, const char *);
+ int fremovexattr(int, const char *);
+ 
++#define __UAPI_DEF_XATTR 0
++
+ #ifdef __cplusplus
+ }
+ #endif
diff --git a/toolchain/musl/patches/400-Add-format-attribute-to-some-function-declarations.patch b/toolchain/musl/patches/400-Add-format-attribute-to-some-function-declarations.patch
index c495d67e08..67fedae30a 100644
--- a/toolchain/musl/patches/400-Add-format-attribute-to-some-function-declarations.patch
+++ b/toolchain/musl/patches/400-Add-format-attribute-to-some-function-declarations.patch
@@ -45,11 +45,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 +#else
 +#define __fp(x, y)
 +#endif
- 
--_Noreturn void err(int, const char *, ...);
--_Noreturn void verr(int, const char *, va_list);
--_Noreturn void errx(int, const char *, ...);
--_Noreturn void verrx(int, const char *, va_list);
++
 +void warn(const char *, ...) __fp(1, 2);
 +void vwarn(const char *, va_list) __fp(1, 0);
 +void warnx(const char *, ...) __fp(1, 2);
@@ -59,7 +55,11 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 +_Noreturn void verr(int, const char *, va_list) __fp(2, 0);
 +_Noreturn void errx(int, const char *, ...) __fp(2, 3);
 +_Noreturn void verrx(int, const char *, va_list) __fp(2, 0);
-+
+ 
+-_Noreturn void err(int, const char *, ...);
+-_Noreturn void verr(int, const char *, va_list);
+-_Noreturn void errx(int, const char *, ...);
+-_Noreturn void verrx(int, const char *, va_list);
 +#undef __fp
  
  #ifdef __cplusplus
