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authorRafael J. Wysocki <rjw@sisk.pl>2008-08-28 08:39:12 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-28 15:27:39 -0400
commit41108eb10142e0552f2de1e4c0675b108c5f018f (patch)
treebb9ef817e2729915fbbe29291c827e7eef83eb54
parentb09331e530777963ed65ce2fdf074b7b077768c7 (diff)
ftrace: disable tracing for hibernation
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>
-rw-r--r--kernel/power/disk.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index f011e0870b52..bbd85c60f741 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -21,6 +21,7 @@
21#include <linux/console.h> 21#include <linux/console.h>
22#include <linux/cpu.h> 22#include <linux/cpu.h>
23#include <linux/freezer.h> 23#include <linux/freezer.h>
24#include <linux/ftrace.h>
24 25
25#include "power.h" 26#include "power.h"
26 27
@@ -255,7 +256,7 @@ static int create_image(int platform_mode)
255 256
256int hibernation_snapshot(int platform_mode) 257int hibernation_snapshot(int platform_mode)
257{ 258{
258 int error; 259 int error, ftrace_save;
259 260
260 /* Free memory before shutting down devices. */ 261 /* Free memory before shutting down devices. */
261 error = swsusp_shrink_memory(); 262 error = swsusp_shrink_memory();
@@ -267,6 +268,7 @@ int hibernation_snapshot(int platform_mode)
267 goto Close; 268 goto Close;
268 269
269 suspend_console(); 270 suspend_console();
271 ftrace_save = __ftrace_enabled_save();
270 error = device_suspend(PMSG_FREEZE); 272 error = device_suspend(PMSG_FREEZE);
271 if (error) 273 if (error)
272 goto Recover_platform; 274 goto Recover_platform;
@@ -296,6 +298,7 @@ int hibernation_snapshot(int platform_mode)
296 Resume_devices: 298 Resume_devices:
297 device_resume(in_suspend ? 299 device_resume(in_suspend ?
298 (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE); 300 (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
301 __ftrace_enabled_restore(ftrace_save);
299 resume_console(); 302 resume_console();
300 Close: 303 Close:
301 platform_end(platform_mode); 304 platform_end(platform_mode);
@@ -366,10 +369,11 @@ static int resume_target_kernel(void)
366 369
367int hibernation_restore(int platform_mode) 370int hibernation_restore(int platform_mode)
368{ 371{
369 int error; 372 int error, ftrace_save;
370 373
371 pm_prepare_console(); 374 pm_prepare_console();
372 suspend_console(); 375 suspend_console();
376 ftrace_save = __ftrace_enabled_save();
373 error = device_suspend(PMSG_QUIESCE); 377 error = device_suspend(PMSG_QUIESCE);
374 if (error) 378 if (error)
375 goto Finish; 379 goto Finish;
@@ -384,6 +388,7 @@ int hibernation_restore(int platform_mode)
384 platform_restore_cleanup(platform_mode); 388 platform_restore_cleanup(platform_mode);
385 device_resume(PMSG_RECOVER); 389 device_resume(PMSG_RECOVER);
386 Finish: 390 Finish:
391 __ftrace_enabled_restore(ftrace_save);
387 resume_console(); 392 resume_console();
388 pm_restore_console(); 393 pm_restore_console();
389 return error; 394 return error;
@@ -396,7 +401,7 @@ int hibernation_restore(int platform_mode)
396 401
397int hibernation_platform_enter(void) 402int hibernation_platform_enter(void)
398{ 403{
399 int error; 404 int error, ftrace_save;
400 405
401 if (!hibernation_ops) 406 if (!hibernation_ops)
402 return -ENOSYS; 407 return -ENOSYS;
@@ -411,6 +416,7 @@ int hibernation_platform_enter(void)
411 goto Close; 416 goto Close;
412 417
413 suspend_console(); 418 suspend_console();
419 ftrace_save = __ftrace_enabled_save();
414 error = device_suspend(PMSG_HIBERNATE); 420 error = device_suspend(PMSG_HIBERNATE);
415 if (error) { 421 if (error) {
416 if (hibernation_ops->recover) 422 if (hibernation_ops->recover)
@@ -445,6 +451,7 @@ int hibernation_platform_enter(void)
445 hibernation_ops->finish(); 451 hibernation_ops->finish();
446 Resume_devices: 452 Resume_devices:
447 device_resume(PMSG_RESTORE); 453 device_resume(PMSG_RESTORE);
454 __ftrace_enabled_restore(ftrace_save);
448 resume_console(); 455 resume_console();
449 Close: 456 Close:
450 hibernation_ops->end(); 457 hibernation_ops->end();