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ftrace: disable tracing for hibernation

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In accordance with commit f42ac38c59e0a03d6da0c24a63fb211393f484b0
("ftrace: disable tracing for suspend to ram"), disable tracing
around the suspend code in hibernation code paths.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki 2008-08-28 14:39:12 +02:00 committed by Linus Torvalds
parent b09331e530
commit 41108eb101
1 changed files with 10 additions and 3 deletions
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13
kernel/power/disk.c
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@ -21,6 +21,7 @@
#include <linux/console.h> #include <linux/console.h>
#include <linux/cpu.h> #include <linux/cpu.h>
#include <linux/freezer.h> #include <linux/freezer.h>
#include <linux/ftrace.h>
#include "power.h" #include "power.h"
@ -255,7 +256,7 @@ static int create_image(int platform_mode)
int hibernation_snapshot(int platform_mode) int hibernation_snapshot(int platform_mode)
{ {
int error; int error, ftrace_save;
/* Free memory before shutting down devices. */ /* Free memory before shutting down devices. */
error = swsusp_shrink_memory(); error = swsusp_shrink_memory();
@ -267,6 +268,7 @@ int hibernation_snapshot(int platform_mode)
goto Close; goto Close;
suspend_console(); suspend_console();
ftrace_save = __ftrace_enabled_save();
error = device_suspend(PMSG_FREEZE); error = device_suspend(PMSG_FREEZE);
if (error) if (error)
goto Recover_platform; goto Recover_platform;
@ -296,6 +298,7 @@ int hibernation_snapshot(int platform_mode)
Resume_devices: Resume_devices:
device_resume(in_suspend ? device_resume(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE); (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
__ftrace_enabled_restore(ftrace_save);
resume_console(); resume_console();
Close: Close:
platform_end(platform_mode); platform_end(platform_mode);
@ -366,10 +369,11 @@ static int resume_target_kernel(void)
int hibernation_restore(int platform_mode) int hibernation_restore(int platform_mode)
{ {
int error; int error, ftrace_save;
pm_prepare_console(); pm_prepare_console();
suspend_console(); suspend_console();
ftrace_save = __ftrace_enabled_save();
error = device_suspend(PMSG_QUIESCE); error = device_suspend(PMSG_QUIESCE);
if (error) if (error)
goto Finish; goto Finish;
@ -384,6 +388,7 @@ int hibernation_restore(int platform_mode)
platform_restore_cleanup(platform_mode); platform_restore_cleanup(platform_mode);
device_resume(PMSG_RECOVER); device_resume(PMSG_RECOVER);
Finish: Finish:
__ftrace_enabled_restore(ftrace_save);
resume_console(); resume_console();
pm_restore_console(); pm_restore_console();
return error; return error;
@ -396,7 +401,7 @@ int hibernation_restore(int platform_mode)
int hibernation_platform_enter(void) int hibernation_platform_enter(void)
{ {
int error; int error, ftrace_save;
if (!hibernation_ops) if (!hibernation_ops)
return -ENOSYS; return -ENOSYS;
@ -411,6 +416,7 @@ int hibernation_platform_enter(void)
goto Close; goto Close;
suspend_console(); suspend_console();
ftrace_save = __ftrace_enabled_save();
error = device_suspend(PMSG_HIBERNATE); error = device_suspend(PMSG_HIBERNATE);
if (error) { if (error) {
if (hibernation_ops->recover) if (hibernation_ops->recover)
@ -445,6 +451,7 @@ int hibernation_platform_enter(void)
hibernation_ops->finish(); hibernation_ops->finish();
Resume_devices: Resume_devices:
device_resume(PMSG_RESTORE); device_resume(PMSG_RESTORE);
__ftrace_enabled_restore(ftrace_save);
resume_console(); resume_console();
Close: Close:
hibernation_ops->end(); hibernation_ops->end();