===================================================================
@@ -74,11 +74,6 @@ struct vdso_data {
__u32 icache_size; /* L1 i-cache size 0x68 */
__u32 icache_line_size; /* L1 i-cache line size 0x6C */
- /* those additional ones don't have to be located anywhere
- * special as they were not part of the original systemcfg
- */
- __s32 wtom_clock_sec; /* Wall to monotonic clock */
- __s32 wtom_clock_nsec;
__u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of syscalls */
__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
};
@@ -89,15 +84,6 @@ struct vdso_data {
* And here is the simpler 32 bits version
*/
struct vdso_data {
- __u64 tb_orig_stamp; /* Timebase at boot 0x30 */
- __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
- __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
- __u64 stamp_xsec; /* 0x48 */
- __u32 tb_update_count; /* Timebase atomicity ctr 0x50 */
- __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
- __u32 tz_dsttime; /* Type of dst correction 0x5C */
- __s32 wtom_clock_sec; /* Wall to monotonic clock */
- __s32 wtom_clock_nsec;
__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
};
Hi, I'm trying to build a 2.6.21 kernel (ppc arch for a 74xx processor) with the PREEMPT_RT patch "patch-2.6.21-rt8". But I'm having some compilation errors in the very early stage. The errors are shown below. arch/ppc/kernel/asm-offsets.c: In function 'main': arch/ppc/kernel/asm-offsets.c:148: error: 'struct vdso_data' has no member named 'tb_orig_stamp' arch/ppc/kernel/asm-offsets.c:149: error: 'struct vdso_data' has no member named 'tb_ticks_per_sec' arch/ppc/kernel/asm-offsets.c:150: error: 'struct vdso_data' has no member named 'tb_to_xs' arch/ppc/kernel/asm-offsets.c:151: error: 'struct vdso_data' has no member named 'stamp_xsec' arch/ppc/kernel/asm-offsets.c:152: error: 'struct vdso_data' has no member named 'tb_update_count' arch/ppc/kernel/asm-offsets.c:153: error: 'struct vdso_data' has no member named 'tz_minuteswest' arch/ppc/kernel/asm-offsets.c:154: error: 'struct vdso_data' has no member named 'tz_dsttime' arch/ppc/kernel/asm-offsets.c:156: error: 'struct vdso_data' has no member named 'wtom_clock_sec' arch/ppc/kernel/asm-offsets.c:157: error: 'struct vdso_data' has no member named 'wtom_clock_nsec' make[1]: *** [arch/ppc/kernel/asm-offsets.s] Error 1 I did dig a little deep to find why this error occurred. It turned out these members are explicitly removed by patch-2.6.21-rt8. See below exerted from this patch file. It makes me wondering if the PREEMPT_RT patch ever worked for ppc arch. The kernel build also had some compilation warnings as follows. CC arch/ppc/kernel/asm-offsets.s In file included from arch/ppc/include/asm/hw_irq.h:110, from include/asm/system.h:10, from include/linux/list.h:9, from include/linux/signal.h:8, from arch/ppc/kernel/asm-offsets.c:11: include/linux/irqflags.h:92:1: warning: "raw_local_irq_save" redefined In file included from include/asm/system.h:10, from include/linux/list.h:9, from include/linux/signal.h:8, from arch/ppc/kernel/asm-offsets.c:11: arch/ppc/include/asm/hw_irq.h:103:1: warning: this is the location of the previous definition In file included from arch/ppc/include/asm/hw_irq.h:110, from include/asm/system.h:10, from include/linux/list.h:9, from include/linux/signal.h:8, from arch/ppc/kernel/asm-offsets.c:11: include/linux/irqflags.h:97:1: warning: "raw_local_irq_restore" redefined In file included from include/asm/system.h:10, from include/linux/list.h:9, from include/linux/signal.h:8, from arch/ppc/kernel/asm-offsets.c:11: arch/ppc/include/asm/hw_irq.h:62:1: warning: this is the location of the previous definition In file included from include/linux/time.h:7, from include/linux/timex.h:57, from include/linux/sched.h:51, from arch/ppc/kernel/asm-offsets.c:12: include/linux/seqlock.h: In function '__read_seqretry': include/linux/seqlock.h:139: warning: implicit declaration of function 'local_irq_save' include/linux/seqlock.h:140: warning: implicit declaration of function 'local_irq_restore' All the failure makes me doubt the correctness of the PREEMPT_RT patch in 2.6.21 for ppc arch. Has anyone made a RT patch work for ppc arch in 2.6.21? In other words, is 2.6.21 a good candidate to test a PREEMPT_RT patch for ppc arch? I understand that ppc arch will eventually replaced by powerpc arch. Is there active work going on in ppc arch to support the PREEMPT_RT? Thanks a lot in advance for your help. -Ryan.