x86: fix TSC build error on 32bit

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>
mariux64 · Jul 15, 2008 · 431ceb8 · 431ceb8
1 parent b9d2252
commit 431ceb8
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
@@ -358,13 +358,15 @@ static cycle_t read_tsc(void)
 		ret : clocksource_tsc.cycle_last;
 }
 
+#ifdef CONFIG_X86_64
 static cycle_t __vsyscall_fn vread_tsc(void)
 {
 	cycle_t ret = (cycle_t)vget_cycles();
 
 	return ret >= __vsyscall_gtod_data.clock.cycle_last ?
 		ret : __vsyscall_gtod_data.clock.cycle_last;
 }
+#endif
 
 static struct clocksource clocksource_tsc = {
 	.name                   = "tsc",