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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2009-12-09 11:28:13 +0800
committerIngo Molnar <mingo@elte.hu>2009-12-09 09:56:27 +0100
commitaa5452d70c0d559310598b243b8b1033c10056e7 (patch)
tree80f1c0b1137722a71623254c93bec20e33f4b19d /kernel
parent44234adcdce38f83c56e05f808ce656175b4beeb (diff)
downloadlinux-linaro-aa5452d70c0d559310598b243b8b1033c10056e7.tar.gz
perf_event: Clean up __perf_event_init_context()
Clean up the code a bit: - define 'perf_cpu_context' variable with 'static' - use kzalloc() instead of kmalloc() and memset() Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <4B1F194D.7080306@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/perf_event.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 3b0cf86eee8..2b06c45bfba 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -36,7 +36,7 @@
/*
* Each CPU has a list of per CPU events:
*/
-DEFINE_PER_CPU(struct perf_cpu_context, perf_cpu_context);
+static DEFINE_PER_CPU(struct perf_cpu_context, perf_cpu_context);
int perf_max_events __read_mostly = 1;
static int perf_reserved_percpu __read_mostly;
@@ -1579,7 +1579,6 @@ static void
__perf_event_init_context(struct perf_event_context *ctx,
struct task_struct *task)
{
- memset(ctx, 0, sizeof(*ctx));
spin_lock_init(&ctx->lock);
mutex_init(&ctx->mutex);
INIT_LIST_HEAD(&ctx->group_list);
@@ -1654,7 +1653,7 @@ static struct perf_event_context *find_get_context(pid_t pid, int cpu)
}
if (!ctx) {
- ctx = kmalloc(sizeof(struct perf_event_context), GFP_KERNEL);
+ ctx = kzalloc(sizeof(struct perf_event_context), GFP_KERNEL);
err = -ENOMEM;
if (!ctx)
goto errout;
@@ -5105,7 +5104,7 @@ int perf_event_init_task(struct task_struct *child)
* First allocate and initialize a context for the child.
*/
- child_ctx = kmalloc(sizeof(struct perf_event_context), GFP_KERNEL);
+ child_ctx = kzalloc(sizeof(struct perf_event_context), GFP_KERNEL);
if (!child_ctx)
return -ENOMEM;