summaryrefslogtreecommitdiffstats
path: root/kernel/trace/trace_event_perf.c
diff options
context:
space:
mode:
authorFrederic Weisbecker <fweisbec@gmail.com>2010-08-14 20:45:13 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-08-19 01:32:53 +0200
commit7ae07ea3a48d30689ee037cb136bc21f0b37d8ae (patch)
tree2cb895a0794bcb2e45a4f48ef7e93302c1f6332c /kernel/trace/trace_event_perf.c
parent927c7a9e92c4f69097a6e9e086d11fc2f8a5b40b (diff)
downloadlinux-7ae07ea3a48d30689ee037cb136bc21f0b37d8ae.tar.bz2
perf: Humanize the number of contexts
Instead of hardcoding the number of contexts for the recursions barriers, define a cpp constant to make the code more self-explanatory. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephane Eranian <eranian@google.com>
Diffstat (limited to 'kernel/trace/trace_event_perf.c')
-rw-r--r--kernel/trace/trace_event_perf.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index 000e6e85b445..db2eae2efcf2 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -9,7 +9,7 @@
#include <linux/kprobes.h>
#include "trace.h"
-static char *perf_trace_buf[4];
+static char *perf_trace_buf[PERF_NR_CONTEXTS];
/*
* Force it to be aligned to unsigned long to avoid misaligned accesses
@@ -45,7 +45,7 @@ static int perf_trace_event_init(struct ftrace_event_call *tp_event,
char *buf;
int i;
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < PERF_NR_CONTEXTS; i++) {
buf = (char *)alloc_percpu(perf_trace_t);
if (!buf)
goto fail;
@@ -65,7 +65,7 @@ fail:
if (!total_ref_count) {
int i;
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < PERF_NR_CONTEXTS; i++) {
free_percpu(perf_trace_buf[i]);
perf_trace_buf[i] = NULL;
}
@@ -140,7 +140,7 @@ void perf_trace_destroy(struct perf_event *p_event)
tp_event->perf_events = NULL;
if (!--total_ref_count) {
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < PERF_NR_CONTEXTS; i++) {
free_percpu(perf_trace_buf[i]);
perf_trace_buf[i] = NULL;
}