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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-10-19 14:37:23 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-22 14:18:25 +0200 |
| commit | 65af94baca56beb3514d6cfce782634db9cf676d (patch) | |
| tree | caeba23895f0948bfcef58ec1a27a86b1ff8d6d7 /arch/x86/kernel/cpu | |
| parent | 5ee25c87318fa3722026fd77089fa7ba0db8d447 (diff) | |
| download | linux-65af94baca56beb3514d6cfce782634db9cf676d.tar.gz linux-65af94baca56beb3514d6cfce782634db9cf676d.tar.bz2 linux-65af94baca56beb3514d6cfce782634db9cf676d.zip | |
perf, x86: Extract DS alloc/free functions
Again, mostly a cleanup to unclutter the reserve_ds_buffer() code.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Stephane Eranian <eranian@google.com>
LKML-Reference: <20101019134808.304495776@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_intel_ds.c | 40 |
1 files changed, 26 insertions, 14 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 14d98bd52055..3c86f4d2f02d 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -148,6 +148,30 @@ static void release_bts_buffer(int cpu) ds->bts_buffer_base = 0; } +static int alloc_ds_buffer(int cpu) +{ + struct debug_store *ds; + + ds = kzalloc(sizeof(*ds), GFP_KERNEL); + if (unlikely(!ds)) + return -ENOMEM; + + per_cpu(cpu_hw_events, cpu).ds = ds; + + return 0; +} + +static void release_ds_buffer(int cpu) +{ + struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds; + + if (!ds) + return; + + per_cpu(cpu_hw_events, cpu).ds = NULL; + kfree(ds); +} + static void release_ds_buffers(void) { int cpu; @@ -160,16 +184,9 @@ static void release_ds_buffers(void) fini_debug_store_on_cpu(cpu); for_each_possible_cpu(cpu) { - struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds; - - if (!ds) - continue; - release_pebs_buffer(cpu); release_bts_buffer(cpu); - - per_cpu(cpu_hw_events, cpu).ds = NULL; - kfree(ds); + release_ds_buffer(cpu); } put_online_cpus(); } @@ -184,13 +201,8 @@ static int reserve_ds_buffers(void) get_online_cpus(); for_each_possible_cpu(cpu) { - struct debug_store *ds; - - err = -ENOMEM; - ds = kzalloc(sizeof(*ds), GFP_KERNEL); - if (unlikely(!ds)) + if (alloc_ds_buffer(cpu)) break; - per_cpu(cpu_hw_events, cpu).ds = ds; if (alloc_bts_buffer(cpu)) break; |