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PM / sleep: add pm-trace support for suspending phase

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Occasionally, the system can't come back up after suspend/resume
due to problems of device suspending phase. This patch make
PM_TRACE infrastructure cover device suspending phase of
suspend/resume process, and the information in RTC can tell
developers which device suspending function make system hang.

Signed-off-by: Zhonghui Fu <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Zhonghui Fu 2015-03-18 15:54:27 +01:00 • committed by Rafael J. Wysocki
commit 431d452af1
5 changed files with 31 additions and 16 deletions
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kernel/power/main.c
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@ -11,7 +11,7 @@
#include <linux/export.h>
#include <linux/kobject.h>
#include <linux/string.h>
#include <linux/resume-trace.h>
#include <linux/pm-trace.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>