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swsusp: remove code duplication between disk.c and user.c

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Currently, much of the code in kernel/power/disk.c is duplicated in
kernel/power/user.c , mainly for historical reasons.  By eliminating this code
duplication we can reduce the size of user.c quite substantially and remove
the maintenance difficulty resulting from it.

[bunk@stusta.de: kernel/power/disk.c: make code static]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki
2007-07-19 01:47:29 -07:00
committed by Linus Torvalds
parent 127067a9c9
commit 7777fab989
3 changed files with 115 additions and 170 deletions
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96
kernel/power/user.c
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@ -128,83 +128,6 @@ static ssize_t snapshot_write(struct file *filp, const char __user *buf,
return res;
}
static inline int platform_prepare(void)
{
int error = 0;
if (hibernation_ops)
error = hibernation_ops->prepare();
return error;
}
static inline void platform_finish(void)
{
if (hibernation_ops)
hibernation_ops->finish();
}
static inline int snapshot_suspend(int platform_suspend)
{
int error;
mutex_lock(&pm_mutex);
/* Free memory before shutting down devices. */
error = swsusp_shrink_memory();
if (error)
goto Finish;
if (platform_suspend) {
error = platform_prepare();
if (error)
goto Finish;
}
suspend_console();
error = device_suspend(PMSG_FREEZE);
if (error)
goto Resume_devices;
error = disable_nonboot_cpus();
if (!error) {
in_suspend = 1;
error = swsusp_suspend();
}
enable_nonboot_cpus();
Resume_devices:
if (platform_suspend)
platform_finish();
device_resume();
resume_console();
Finish:
mutex_unlock(&pm_mutex);
return error;
}
static inline int snapshot_restore(void)
{
int error;
mutex_lock(&pm_mutex);
pm_prepare_console();
suspend_console();
error = device_suspend(PMSG_PRETHAW);
if (error)
goto Finish;
error = disable_nonboot_cpus();
if (!error)
error = swsusp_resume();
enable_nonboot_cpus();
Finish:
device_resume();
resume_console();
pm_restore_console();
mutex_unlock(&pm_mutex);
return error;
}
static int snapshot_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
@ -251,7 +174,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
error = -EPERM;
break;
}
error = snapshot_suspend(data->platform_suspend);
error = hibernation_snapshot(data->platform_suspend);
if (!error)
error = put_user(in_suspend, (unsigned int __user *)arg);
if (!error)
@ -265,7 +188,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
error = -EPERM;
break;
}
error = snapshot_restore();
error = hibernation_restore();
break;
case SNAPSHOT_FREE:
@ -377,19 +300,14 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
switch (arg) {
case PMOPS_PREPARE:
if (hibernation_ops) {
data->platform_suspend = 1;
error = 0;
} else {
error = -ENOSYS;
}
data->platform_suspend = 1;
error = 0;
break;
case PMOPS_ENTER:
if (data->platform_suspend) {
kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
error = hibernation_ops->enter();
}
if (data->platform_suspend)
error = hibernation_platform_enter();
break;
case PMOPS_FINISH: