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authorArjan van de Ven <arjan@infradead.org>2009-02-10 22:42:26 +0300
committerIngo Molnar <mingo@elte.hu>2009-02-11 12:18:04 +0300
commitad0b0fd554dfc126b5750d14908dccc3bbf602be (patch)
tree35e178387e36ac62672e2076231a608c571de0c1 /include/linux/latencytop.h
parentf437e8b53eab92a5829e65781e29aed23d8ffd0c (diff)
downloadlinux-ad0b0fd554dfc126b5750d14908dccc3bbf602be.tar.xz
sched, latencytop: incorporate review feedback from Andrew Morton
Andrew had some suggestions for the latencytop file; this patch takes care of most of these: * Add documentation * Turn account_scheduler_latency into an inline function * Don't report negative values to userspace * Make the file operations struct const * Fix a few checkpatch.pl warnings Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/latencytop.h')
-rw-r--r--include/linux/latencytop.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/latencytop.h b/include/linux/latencytop.h
index 901c2d6377a8..b0e99898527c 100644
--- a/include/linux/latencytop.h
+++ b/include/linux/latencytop.h
@@ -9,6 +9,7 @@
#ifndef _INCLUDE_GUARD_LATENCYTOP_H_
#define _INCLUDE_GUARD_LATENCYTOP_H_
+#include <linux/compiler.h>
#ifdef CONFIG_LATENCYTOP
#define LT_SAVECOUNT 32
@@ -24,7 +25,14 @@ struct latency_record {
struct task_struct;
-void account_scheduler_latency(struct task_struct *task, int usecs, int inter);
+extern int latencytop_enabled;
+void __account_scheduler_latency(struct task_struct *task, int usecs, int inter);
+static inline void
+account_scheduler_latency(struct task_struct *task, int usecs, int inter)
+{
+ if (unlikely(latencytop_enabled))
+ __account_scheduler_latency(task, usecs, inter);
+}
void clear_all_latency_tracing(struct task_struct *p);