summaryrefslogtreecommitdiff
path: root/include/linux/suspend.h
diff options
context:
space:
mode:
authorBart Van Assche <bart.vanassche@wdc.com>2018-01-05 09:19:08 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-01-10 01:07:46 +0100
commit4bf236a3330e97d275e5848420f7e31948fef07a (patch)
tree0be93c72c34a05451c4fd8bdb9c57d84dd06720a /include/linux/suspend.h
parentbdbc98abb3aa323f6323b11db39c740e6f8fc5b1 (diff)
PM / sleep: Make lock/unlock_system_sleep() available to kernel modules
Since pm_mutex is not exported using lock/unlock_system_sleep() from inside a kernel module causes a "pm_mutex undefined" linker error. Hence move lock/unlock_system_sleep() into kernel/power/main.c and export these. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/suspend.h')
-rw-r--r--include/linux/suspend.h28
1 files changed, 2 insertions, 26 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index d60b0f5c38d5..cc22a24516d6 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -443,32 +443,8 @@ extern bool pm_save_wakeup_count(unsigned int count);
extern void pm_wakep_autosleep_enabled(bool set);
extern void pm_print_active_wakeup_sources(void);
-static inline void lock_system_sleep(void)
-{
- current->flags |= PF_FREEZER_SKIP;
- mutex_lock(&pm_mutex);
-}
-
-static inline void unlock_system_sleep(void)
-{
- /*
- * Don't use freezer_count() because we don't want the call to
- * try_to_freeze() here.
- *
- * Reason:
- * Fundamentally, we just don't need it, because freezing condition
- * doesn't come into effect until we release the pm_mutex lock,
- * since the freezer always works with pm_mutex held.
- *
- * More importantly, in the case of hibernation,
- * unlock_system_sleep() gets called in snapshot_read() and
- * snapshot_write() when the freezing condition is still in effect.
- * Which means, if we use try_to_freeze() here, it would make them
- * enter the refrigerator, thus causing hibernation to lockup.
- */
- current->flags &= ~PF_FREEZER_SKIP;
- mutex_unlock(&pm_mutex);
-}
+extern void lock_system_sleep(void);
+extern void unlock_system_sleep(void);
#else /* !CONFIG_PM_SLEEP */