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[v2,4/4] sync_file_range: fix standard UCLIBC_SYSCALL_ALIGN_64BIT handling

Message ID 1424353442-18949-5-git-send-email-vgupta@synopsys.com
State Accepted
Commit cd03281d3c2c168f32e42783ee78995772a1763a
Headers show

Commit Message

Vineet Gupta Feb. 19, 2015, 1:44 p.m. UTC 
Currently UCLIBC_SYSCALL_ALIGN_64BIT is not explicitly handled. Fix that
and make sure the special handling is done for powerpc/xtensa which use
UCLIBC_SYSCALL_ALIGN_64BIT but don't use hole punched syscall handler in
kernel.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Cc: Max Filippov <jcmvbkbc@gmail.com>
---
 libc/sysdeps/linux/common/sync_file_range.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/libc/sysdeps/linux/common/sync_file_range.c b/libc/sysdeps/linux/common/sync_file_range.c
index 6cd7e94d6af6..db797de6272a 100644
--- a/libc/sysdeps/linux/common/sync_file_range.c
+++ b/libc/sysdeps/linux/common/sync_file_range.c
@@ -24,7 +24,11 @@  static int __NC(sync_file_range)(int fd, off64_t offset, off64_t nbytes, unsigne
 {
 #  if defined __powerpc__ && __WORDSIZE == 64
 	return INLINE_SYSCALL(sync_file_range, 4, fd, flags, offset, nbytes);
-#  elif defined __mips__ && _MIPS_SIM == _ABIO32
+#  elif (defined __mips__ && _MIPS_SIM == _ABIO32) || \
+	(defined(__UCLIBC_SYSCALL_ALIGN_64BIT__) && !(defined(__powerpc__) || defined(__xtensa__)))
+	/* arch with 64-bit data in even reg alignment #2: [arcv2/others-in-future]
+	 * stock syscall handler in kernel (reg hole punched)
+	 * see libc/sysdeps/linux/common/posix_fadvise.c for more details */
 	return INLINE_SYSCALL(sync_file_range, 7, fd, 0,
 			OFF64_HI_LO(offset), OFF64_HI_LO(nbytes), flags);
 #  elif defined __NR_sync_file_range2