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authorIngo Molnar <mingo@elte.hu>2008-01-30 13:32:39 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:32:39 +0100
commitcdc7957d1954908a39a6964e9c6f643916e76c4b (patch)
treef2ab54704a12d7ebeb782b3a539682254d9dc5f9 /arch/x86/kernel/rtc.c
parentfde1b3fa947c2512e3715962ebb1d3a6a9b9bb7d (diff)
x86: move native_read_tsc() offline
move native_read_tsc() offline. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/rtc.c')
-rw-r--r--arch/x86/kernel/rtc.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index d040840ff1b6..c42cf1263882 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -6,6 +6,7 @@
#include <linux/mc146818rtc.h>
#include <asm/time.h>
+#include <asm/vsyscall.h>
#ifdef CONFIG_X86_32
# define CMOS_YEARS_OFFS 1900
@@ -194,3 +195,12 @@ int update_persistent_clock(struct timespec now)
{
return set_rtc_mmss(now.tv_sec);
}
+
+unsigned long long __vsyscall_fn native_read_tsc(void)
+{
+ DECLARE_ARGS(val, low, high);
+
+ asm volatile("rdtsc" : EAX_EDX_RET(val, low, high));
+ return EAX_EDX_VAL(val, low, high);
+}
+EXPORT_SYMBOL_GPL(native_read_tsc);