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| author | Ingo Molnar <mingo@kernel.org> | 2015-08-03 11:04:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-08-03 11:04:00 +0200 |
| commit | f320ead76a87a9c533f681ecce3bf3241d07c47d (patch) | |
| tree | 76ae437119088b180737670cb99a307e163a1ca0 /arch/x86/lib/delay.c | |
| parent | 76695af20c015206cffb84b15912be6797d0cca2 (diff) | |
| parent | decd275e62d5eef4b947fab89652fa6afdadf2f2 (diff) | |
| download | linux-f320ead76a87a9c533f681ecce3bf3241d07c47d.tar.bz2 | |
Merge branch 'x86/asm' into locking/core
Upcoming changes to static keys is interacting/conflicting with the following
pending TSC commits in tip:x86/asm:
4ea1636b04db x86/asm/tsc: Rename native_read_tsc() to rdtsc()
...
So merge it into the locking tree to have a smoother resolution.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/lib/delay.c')
| -rw-r--r-- | arch/x86/lib/delay.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c index 39d6a3db0b96..4453d52a143d 100644 --- a/arch/x86/lib/delay.c +++ b/arch/x86/lib/delay.c @@ -49,16 +49,14 @@ static void delay_loop(unsigned long loops) /* TSC based delay: */ static void delay_tsc(unsigned long __loops) { - u32 bclock, now, loops = __loops; + u64 bclock, now, loops = __loops; int cpu; preempt_disable(); cpu = smp_processor_id(); - rdtsc_barrier(); - rdtscl(bclock); + bclock = rdtsc_ordered(); for (;;) { - rdtsc_barrier(); - rdtscl(now); + now = rdtsc_ordered(); if ((now - bclock) >= loops) break; @@ -79,8 +77,7 @@ static void delay_tsc(unsigned long __loops) if (unlikely(cpu != smp_processor_id())) { loops -= (now - bclock); cpu = smp_processor_id(); - rdtsc_barrier(); - rdtscl(bclock); + bclock = rdtsc_ordered(); } } preempt_enable(); @@ -100,7 +97,7 @@ void use_tsc_delay(void) int read_current_timer(unsigned long *timer_val) { if (delay_fn == delay_tsc) { - rdtscll(*timer_val); + *timer_val = rdtsc(); return 0; } return -1; |