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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-10 16:04:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-10 16:04:38 -0700
commita9642fa351c9dbf930ad2b5a1c17f3cfe2f62820 (patch)
tree41a587b1ce1ec65bf4dd2e24afe2fc6d73f4b682
parent8133633368760656c76b8302dbd4bfa20f887df6 (diff)
parente5302920da9ef23f9d19d4e9ac85704cc25bee7a (diff)
downloadop-kernel-dev-a9642fa351c9dbf930ad2b5a1c17f3cfe2f62820.zip
op-kernel-dev-a9642fa351c9dbf930ad2b5a1c17f3cfe2f62820.tar.gz
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar: "Two small fixlets" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: Fix interrupt handler timing harness perf/x86/amd: Do not print an error when the device is not present
-rw-r--r--arch/x86/kernel/cpu/perf_event_amd_iommu.c4
-rw-r--r--kernel/events/core.c4
2 files changed, 3 insertions, 5 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_amd_iommu.c b/arch/x86/kernel/cpu/perf_event_amd_iommu.c
index 0db655e..639d128 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_iommu.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_iommu.c
@@ -491,10 +491,8 @@ static struct perf_amd_iommu __perf_iommu = {
static __init int amd_iommu_pc_init(void)
{
/* Make sure the IOMMU PC resource is available */
- if (!amd_iommu_pc_supported()) {
- pr_err("perf: amd_iommu PMU not installed. No support!\n");
+ if (!amd_iommu_pc_supported())
return -ENODEV;
- }
_init_perf_amd_iommu(&__perf_iommu, "amd_iommu");
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 1db3af9..1833bc5 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -182,7 +182,7 @@ void update_perf_cpu_limits(void)
u64 tmp = perf_sample_period_ns;
tmp *= sysctl_perf_cpu_time_max_percent;
- tmp = do_div(tmp, 100);
+ do_div(tmp, 100);
atomic_set(&perf_sample_allowed_ns, tmp);
}
@@ -232,7 +232,7 @@ DEFINE_PER_CPU(u64, running_sample_length);
void perf_sample_event_took(u64 sample_len_ns)
{
u64 avg_local_sample_len;
- u64 local_samples_len = __get_cpu_var(running_sample_length);
+ u64 local_samples_len;
if (atomic_read(&perf_sample_allowed_ns) == 0)
return;
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