Commit 92767af0 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: fix sched_clock() 



[ andi@firstfloor.org: build fix ]

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 6d63de8d

arch/x86/kernel/rtc.c

+4 −9
Original line number Diff line number Diff line
@@ -196,14 +196,9 @@ int update_persistent_clock(struct timespec now) 
	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);



	rdtsc_barrier();

	asm volatile("rdtsc" : EAX_EDX_RET(val, low, high));

	rdtsc_barrier();



	return EAX_EDX_VAL(val, low, high);

	return __native_read_tsc();

}

EXPORT_SYMBOL_GPL(native_read_tsc);
 
EXPORT_SYMBOL(native_read_tsc);

include/asm-x86/msr.h

+11 −0
Original line number Diff line number Diff line
@@ -93,6 +93,17 @@ static inline int native_write_msr_safe(unsigned int msr, 


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)

{

	DECLARE_ARGS(val, low, high);

include/asm-x86/tsc.h

+1 −1
Original line number Diff line number Diff line
@@ -46,7 +46,7 @@ static inline cycles_t vget_cycles(void) 
	if (!cpu_has_tsc)

		return 0;

#endif

	return (cycles_t) native_read_tsc();

	return (cycles_t) __native_read_tsc();

}



extern void tsc_init(void);

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