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sched, latencytop: incorporate review feedback from Andrew Morton

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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>
This commit is contained in:
Arjan van de Ven
2009-02-10 11:42:26 -08:00
committed by Ingo Molnar
parent f437e8b53e
commit ad0b0fd554
2 changed files with 80 additions and 13 deletions
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10
include/linux/latencytop.h
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@@ -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);