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x86: fix sched_clock() 

[ andi@firstfloor.org: build fix ]

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-01-30 13:32:40 +01:00
parent 6d63de8dbc
commit 92767af0e3
3 changed files with 16 additions and 10 deletions
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13
arch/x86/kernel/rtc.c
View File

@ -196,14 +196,9 @@ int update_persistent_clock(struct timespec now)
return set_rtc_mmss(now.tv_sec); return set_rtc_mmss(now.tv_sec);
} }
unsigned long long __vsyscall_fn native_read_tsc(void) unsigned long long native_read_tsc(void)
{ {
DECLARE_ARGS(val, low, high); return __native_read_tsc();
rdtsc_barrier();
asm volatile("rdtsc" : EAX_EDX_RET(val, low, high));
rdtsc_barrier();
return EAX_EDX_VAL(val, low, high);
} }
EXPORT_SYMBOL_GPL(native_read_tsc); EXPORT_SYMBOL(native_read_tsc);

11
include/asm-x86/msr.h
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@ -93,6 +93,17 @@ static inline int native_write_msr_safe(unsigned int msr,
extern unsigned long long native_read_tsc(void); extern unsigned long long native_read_tsc(void);
static __always_inline unsigned long long __native_read_tsc(void)
{
DECLARE_ARGS(val, low, high);
rdtsc_barrier();
asm volatile("rdtsc" : EAX_EDX_RET(val, low, high));
rdtsc_barrier();
return EAX_EDX_VAL(val, low, high);
}
static inline unsigned long long native_read_pmc(int counter) static inline unsigned long long native_read_pmc(int counter)
{ {
DECLARE_ARGS(val, low, high); DECLARE_ARGS(val, low, high);

2
include/asm-x86/tsc.h
View File

@ -46,7 +46,7 @@ static inline cycles_t vget_cycles(void)
if (!cpu_has_tsc) if (!cpu_has_tsc)
return 0; return 0;
#endif #endif
return (cycles_t) native_read_tsc(); return (cycles_t) __native_read_tsc();
} }
extern void tsc_init(void); extern void tsc_init(void);