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authorLi Zefan <lizf@cn.fujitsu.com>2011-03-03 14:26:06 +0800
committerIngo Molnar <mingo@elte.hu>2011-03-04 11:32:51 +0100
commit1b15d0558e82df9b3659804ceb44187b98eda354 (patch)
tree5ef63c23940d606bed12ae23a0ab5839c55fa919 /kernel/perf_event.c
parentf75e18cb9627b1d3d752b83a0b5563da0042c50a (diff)
downloadop-kernel-dev-1b15d0558e82df9b3659804ceb44187b98eda354.zip
op-kernel-dev-1b15d0558e82df9b3659804ceb44187b98eda354.tar.gz
perf cgroup: Clean up perf_cgroup_create()
- Use kzalloc() to replace kmalloc() + memset(). - Remove redundant initialization, since alloc_percpu() returns zero-filled percpu memory. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4D6F347E.2010806@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_event.c')
-rw-r--r--kernel/perf_event.c11
1 files changed, 1 insertions, 10 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index b002095..193b190 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -7346,26 +7346,17 @@ static struct cgroup_subsys_state *perf_cgroup_create(
struct cgroup_subsys *ss, struct cgroup *cont)
{
struct perf_cgroup *jc;
- struct perf_cgroup_info *t;
- int c;
- jc = kmalloc(sizeof(*jc), GFP_KERNEL);
+ jc = kzalloc(sizeof(*jc), GFP_KERNEL);
if (!jc)
return ERR_PTR(-ENOMEM);
- memset(jc, 0, sizeof(*jc));
-
jc->info = alloc_percpu(struct perf_cgroup_info);
if (!jc->info) {
kfree(jc);
return ERR_PTR(-ENOMEM);
}
- for_each_possible_cpu(c) {
- t = per_cpu_ptr(jc->info, c);
- t->time = 0;
- t->timestamp = 0;
- }
return &jc->css;
}
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