From: Johannes Berg <[EMAIL PROTECTED]>
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 <[EMAIL PROTECTED]>
Acked-by: Pavel Machek <[EMAIL PROTECTED]>
Signed-off-by: Rafael J. Wysocki <[EMAIL PROTECTED]>
Signed-off-by: Len Brown <[EMAIL PROTECTED]>
---
arch/powerpc/Kconfig | 4 ++++
kernel/power/Kconfig | 11 +++++++++++
kernel/power/main.c | 6 +++---
kernel/power/power.h | 22 ++++++++++++++++++++++
4 files changed, 40 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 824140d..4a22c99 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -405,6 +405,10 @@ config CMDLINE
most cases you will need to specify the root device here.
if !44x || BROKEN
+config ARCH_WANTS_FREEZER_CONTROL
+ def_bool y
+ depends on ADB_PMU
+
source kernel/power/Kconfig
endif
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index f8153fd..ef9b802 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 d9bba45..e47214c 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 8ec5499..700f44e 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
--
1.5.4.rc5.16.gc0279
--
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