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x86: fix TSC build error on 32bit

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Dave Hansen reported a build error on 32bit which went unnoticed
as newer gcc versions seem to optimize unused static functions
away before compiling them.

Make vread_tsc() depend on CONFIG_X86_64

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner
2008-07-15 22:08:04 +02:00
parent b9d2252c1e
commit 431ceb83f7
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/tsc.c
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@@ -358,6 +358,7 @@ static cycle_t read_tsc(void)
ret : clocksource_tsc.cycle_last; ret : clocksource_tsc.cycle_last;
} }
#ifdef CONFIG_X86_64
static cycle_t __vsyscall_fn vread_tsc(void) static cycle_t __vsyscall_fn vread_tsc(void)
{ {
cycle_t ret = (cycle_t)vget_cycles(); cycle_t ret = (cycle_t)vget_cycles();
@@ -365,6 +366,7 @@ static cycle_t __vsyscall_fn vread_tsc(void)
return ret >= __vsyscall_gtod_data.clock.cycle_last ? return ret >= __vsyscall_gtod_data.clock.cycle_last ?
ret : __vsyscall_gtod_data.clock.cycle_last; ret : __vsyscall_gtod_data.clock.cycle_last;
} }
#endif
static struct clocksource clocksource_tsc = { static struct clocksource clocksource_tsc = {
.name = "tsc", .name = "tsc",