diff options
| author | Ingo Molnar <mingo@kernel.org> | 2014-01-25 09:16:14 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-01-25 09:16:14 +0100 |
| commit | 2b45e0f9f34f718725e093f4e335600811d7105a (patch) | |
| tree | 3c6d594539eb16fc955906da65b9fa7aacbc9145 /arch/x86/kernel/cpu/perf_event.c | |
| parent | a85eba8814631d0d48361c8b9a7ee0984e80c03c (diff) | |
| parent | 15c81026204da897a05424c79263aea861a782cc (diff) | |
| download | op-kernel-dev-2b45e0f9f34f718725e093f4e335600811d7105a.zip op-kernel-dev-2b45e0f9f34f718725e093f4e335600811d7105a.tar.gz | |
Merge branch 'linus' into x86/urgent
Merge in the x86 changes to apply a fix.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 8e13293..b886451 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1883,21 +1883,27 @@ static struct pmu pmu = { void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now) { + struct cyc2ns_data *data; + userpg->cap_user_time = 0; userpg->cap_user_time_zero = 0; userpg->cap_user_rdpmc = x86_pmu.attr_rdpmc; userpg->pmc_width = x86_pmu.cntval_bits; - if (!sched_clock_stable) + if (!sched_clock_stable()) return; + data = cyc2ns_read_begin(); + userpg->cap_user_time = 1; - userpg->time_mult = this_cpu_read(cyc2ns); - userpg->time_shift = CYC2NS_SCALE_FACTOR; - userpg->time_offset = this_cpu_read(cyc2ns_offset) - now; + userpg->time_mult = data->cyc2ns_mul; + userpg->time_shift = data->cyc2ns_shift; + userpg->time_offset = data->cyc2ns_offset - now; userpg->cap_user_time_zero = 1; - userpg->time_zero = this_cpu_read(cyc2ns_offset); + userpg->time_zero = data->cyc2ns_offset; + + cyc2ns_read_end(data); } /* |
