diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/disk.c | 16 | ||||
| -rw-r--r-- | kernel/power/main.c | 9 | ||||
| -rw-r--r-- | kernel/power/power.h | 10 | ||||
| -rw-r--r-- | kernel/power/user.c | 11 |
4 files changed, 39 insertions, 7 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c index 885c653..324ac01 100644 --- a/kernel/power/disk.c +++ b/kernel/power/disk.c @@ -281,9 +281,16 @@ int hibernate(void) { int error; + mutex_lock(&pm_mutex); /* The snapshot device should not be opened while we're running */ - if (!atomic_add_unless(&snapshot_device_available, -1, 0)) - return -EBUSY; + if (!atomic_add_unless(&snapshot_device_available, -1, 0)) { + error = -EBUSY; + goto Unlock; + } + + error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE); + if (error) + goto Exit; /* Allocate memory management structures */ error = create_basic_memory_bitmaps(); @@ -294,7 +301,6 @@ int hibernate(void) if (error) goto Finish; - mutex_lock(&pm_mutex); if (hibernation_mode == HIBERNATION_TESTPROC) { printk("swsusp debug: Waiting for 5 seconds.\n"); mdelay(5000); @@ -316,12 +322,14 @@ int hibernate(void) swsusp_free(); } Thaw: - mutex_unlock(&pm_mutex); unprepare_processes(); Finish: free_basic_memory_bitmaps(); Exit: + pm_notifier_call_chain(PM_POST_HIBERNATION); atomic_inc(&snapshot_device_available); + Unlock: + mutex_unlock(&pm_mutex); return error; } diff --git a/kernel/power/main.c b/kernel/power/main.c index fc45ed2..4d26ad3 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -23,6 +23,8 @@ #include "power.h" +BLOCKING_NOTIFIER_HEAD(pm_chain_head); + /*This is just an arbitrary number */ #define FREE_PAGE_NUMBER (100) @@ -78,6 +80,10 @@ static int suspend_prepare(suspend_state_t state) if (!pm_ops || !pm_ops->enter) return -EPERM; + error = pm_notifier_call_chain(PM_SUSPEND_PREPARE); + if (error) + goto Finish; + pm_prepare_console(); if (freeze_processes()) { @@ -125,6 +131,8 @@ static int suspend_prepare(suspend_state_t state) Thaw: thaw_processes(); pm_restore_console(); + Finish: + pm_notifier_call_chain(PM_POST_SUSPEND); return error; } @@ -176,6 +184,7 @@ static void suspend_finish(suspend_state_t state) resume_console(); 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 eab3603..01c2275 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -173,5 +173,15 @@ extern void swsusp_close(void); extern int suspend_enter(suspend_state_t state); struct timeval; +/* kernel/power/swsusp.c */ extern void swsusp_show_speed(struct timeval *, struct timeval *, unsigned int, char *); + +/* kernel/power/main.c */ +extern struct blocking_notifier_head pm_chain_head; + +static inline int pm_notifier_call_chain(unsigned long val) +{ + return (blocking_notifier_call_chain(&pm_chain_head, val, NULL) + == NOTIFY_BAD) ? -EINVAL : 0; +} diff --git a/kernel/power/user.c b/kernel/power/user.c index 1f24f30..7f19afe 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -151,10 +151,14 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp, if (data->frozen) break; mutex_lock(&pm_mutex); - if (freeze_processes()) { - thaw_processes(); - error = -EBUSY; + error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE); + if (!error) { + error = freeze_processes(); + if (error) + thaw_processes(); } + if (error) + pm_notifier_call_chain(PM_POST_HIBERNATION); mutex_unlock(&pm_mutex); if (!error) data->frozen = 1; @@ -165,6 +169,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp, break; mutex_lock(&pm_mutex); thaw_processes(); + pm_notifier_call_chain(PM_POST_HIBERNATION); mutex_unlock(&pm_mutex); data->frozen = 0; break; |
