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authorAndi Kleen <andi@firstfloor.org>2008-05-15 01:10:42 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-05-23 14:08:06 +0200
commita1289643adb6272c04db9399653ae195072c482a (patch)
tree3453581e5c948119acdf8db2fc4e087b7e30e014
parentnamespacecheck: automated fixes (diff)
downloadlinux-a1289643adb6272c04db9399653ae195072c482a.tar.xz
linux-a1289643adb6272c04db9399653ae195072c482a.zip
x86: use explicit copy in vdso_gettimeofday()
Jeremy's gcc 3.4 seems to be unable to inline a 8 byte memcpy. But the vdso doesn't support external references. Copy the structure members of struct timezone explicitely instead. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--arch/x86/vdso/vclock_gettime.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c
index 23476c2ebfc4..efa2ba7c6005 100644
--- a/arch/x86/vdso/vclock_gettime.c
+++ b/arch/x86/vdso/vclock_gettime.c
@@ -106,9 +106,9 @@ int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
do_realtime((struct timespec *)tv);
tv->tv_usec /= 1000;
if (unlikely(tz != NULL)) {
- /* This relies on gcc inlining the memcpy. We'll notice
- if it ever fails to do so. */
- memcpy(tz, &gtod->sys_tz, sizeof(struct timezone));
+ /* Avoid memcpy. Some old compilers fail to inline it */
+ tz->tz_minuteswest = gtod->sys_tz.tz_minuteswest;
+ tz->tz_dsttime = gtod->sys_tz.tz_dsttime;
}
return 0;
}