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| author | Johannes Berg <johannes@sipsolutions.net> | 2008-01-15 23:17:00 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-01 18:30:58 -0500 |
| commit | b28f508112c584cdfbb4d8a9489cc4b79dac68ee (patch) | |
| tree | 8269d53055d0368f6eb25fac6b9d29077382cbca /kernel | |
| parent | c9b6c8f68ee48e1e3dbb53e13316757e2c0b584d (diff) | |
| download | linux-b28f508112c584cdfbb4d8a9489cc4b79dac68ee.tar.gz linux-b28f508112c584cdfbb4d8a9489cc4b79dac68ee.tar.bz2 linux-b28f508112c584cdfbb4d8a9489cc4b79dac68ee.zip | |
Suspend: Add config option to disable the freezer if architecture wants that
This patch makes the freezer optional for suspend to allow the
system to work (or not work) like the original PMU suspend.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/Kconfig | 11 | ||||
| -rw-r--r-- | kernel/power/main.c | 6 | ||||
| -rw-r--r-- | kernel/power/power.h | 22 |
3 files changed, 36 insertions, 3 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index f8153fda06bb..ef9b802738a5 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -104,6 +104,17 @@ config SUSPEND powered and thus its contents are preserved, such as the suspend-to-RAM state (e.g. the ACPI S3 state). +config SUSPEND_FREEZER + bool "Enable freezer for suspend to RAM/standby" \ + if ARCH_WANTS_FREEZER_CONTROL || BROKEN + depends on SUSPEND + default y + help + This allows you to turn off the freezer for suspend. If this is + done, no tasks are frozen for suspend to RAM/standby. + + Turning OFF this setting is NOT recommended! If in doubt, say Y. + config HIBERNATION bool "Hibernation (aka 'suspend to disk')" depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE diff --git a/kernel/power/main.c b/kernel/power/main.c index d9bba452764b..e47214cfeb2d 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -181,7 +181,7 @@ static int suspend_prepare(void) pm_prepare_console(); - if (freeze_processes()) { + if (suspend_freeze_processes()) { error = -EAGAIN; goto Thaw; } @@ -199,7 +199,7 @@ static int suspend_prepare(void) return 0; Thaw: - thaw_processes(); + suspend_thaw_processes(); pm_restore_console(); Finish: pm_notifier_call_chain(PM_POST_SUSPEND); @@ -308,7 +308,7 @@ int suspend_devices_and_enter(suspend_state_t state) */ static void suspend_finish(void) { - thaw_processes(); + suspend_thaw_processes(); pm_restore_console(); pm_notifier_call_chain(PM_POST_SUSPEND); } diff --git a/kernel/power/power.h b/kernel/power/power.h index 8ec5499c5ce1..700f44ec8406 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -1,6 +1,7 @@ #include <linux/suspend.h> #include <linux/suspend_ioctls.h> #include <linux/utsname.h> +#include <linux/freezer.h> struct swsusp_info { struct new_utsname uts; @@ -203,3 +204,24 @@ enum { #define TEST_MAX (__TEST_AFTER_LAST - 1) extern int pm_test_level; + +#ifdef CONFIG_SUSPEND_FREEZER +static inline int suspend_freeze_processes(void) +{ + return freeze_processes(); +} + +static inline void suspend_thaw_processes(void) +{ + thaw_processes(); +} +#else +static inline int suspend_freeze_processes(void) +{ + return 0; +} + +static inline void suspend_thaw_processes(void) +{ +} +#endif |