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authorJohannes Berg <johannes@sipsolutions.net>2007-05-06 14:50:49 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 12:12:59 -0700
commitab3bfca7abf3fd0fe41d26d839610a787aa7e587 (patch)
treee62e58beaf9d22d4156b27d4523c3728bf5769bc
parentb1296cc48b39355241470ef934a5e2270e3f23bd (diff)
remove software_suspend()
Remove software_suspend() and all its users since pm_suspend(PM_SUSPEND_DISK) should be equivalent and there's no point in having two interfaces for the same thing. The patch also changes the valid_state function to return 0 (false) for PM_SUSPEND_DISK when SOFTWARE_SUSPEND is not configured instead of accepting it and having the whole thing fail later. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/acpi/sleep/proc.c2
-rw-r--r--drivers/i2c/chips/tps65010.c4
-rw-r--r--include/linux/init.h2
-rw-r--r--include/linux/suspend.h8
-rw-r--r--kernel/power/main.c21
-rw-r--r--kernel/sys.c2
6 files changed, 13 insertions, 26 deletions
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 2d912b71e54..dcde9ddd105 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -60,7 +60,7 @@ acpi_system_write_sleep(struct file *file,
state = simple_strtoul(str, NULL, 0);
#ifdef CONFIG_SOFTWARE_SUSPEND
if (state == 4) {
- error = software_suspend();
+ error = pm_suspend(PM_SUSPEND_DISK);
goto Done;
}
#endif
diff --git a/drivers/i2c/chips/tps65010.c b/drivers/i2c/chips/tps65010.c
index 214fbb1423c..7ed92dc3d83 100644
--- a/drivers/i2c/chips/tps65010.c
+++ b/drivers/i2c/chips/tps65010.c
@@ -351,8 +351,10 @@ static void tps65010_interrupt(struct tps65010 *tps)
#if 0
/* REVISIT: this might need its own workqueue
* plus tweaks including deadlock avoidance ...
+ * also needs to get error handling and probably
+ * an #ifdef CONFIG_SOFTWARE_SUSPEND
*/
- software_suspend();
+ pm_suspend(PM_SUSPEND_DISK);
#endif
poll = 1;
}
diff --git a/include/linux/init.h b/include/linux/init.h
index 9abf120ec9f..dbbdbd1bec7 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -233,7 +233,7 @@ void __init parse_early_param(void);
#define __obsolete_setup(str) /* nothing */
#endif
-/* Data marked not to be saved by software_suspend() */
+/* Data marked not to be saved by software suspend */
#define __nosavedata __attribute__ ((__section__ (".data.nosave")))
/* This means "can be init if no module support, otherwise module load
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 3cc4d6394c0..3aecc96acc7 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -33,8 +33,6 @@ static inline void pm_restore_console(void) {}
#endif
#if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)
-/* kernel/power/swsusp.c */
-extern int software_suspend(void);
/* kernel/power/snapshot.c */
extern void __init register_nosave_region(unsigned long, unsigned long);
extern int swsusp_page_is_forbidden(struct page *);
@@ -42,12 +40,6 @@ extern void swsusp_set_page_free(struct page *);
extern void swsusp_unset_page_free(struct page *);
extern unsigned long get_safe_page(gfp_t gfp_mask);
#else
-static inline int software_suspend(void)
-{
- printk("Warning: fake suspend called\n");
- return -ENOSYS;
-}
-
static inline void register_nosave_region(unsigned long b, unsigned long e) {}
static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
static inline void swsusp_set_page_free(struct page *p) {}
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 5a779270cdb..f6dda685e7e 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -184,17 +184,21 @@ static void suspend_finish(suspend_state_t state)
static const char * const pm_states[PM_SUSPEND_MAX] = {
[PM_SUSPEND_STANDBY] = "standby",
[PM_SUSPEND_MEM] = "mem",
-#ifdef CONFIG_SOFTWARE_SUSPEND
[PM_SUSPEND_DISK] = "disk",
-#endif
};
static inline int valid_state(suspend_state_t state)
{
/* Suspend-to-disk does not really need low-level support.
- * It can work with reboot if needed. */
+ * It can work with shutdown/reboot if needed. If it isn't
+ * configured, then it cannot be supported.
+ */
if (state == PM_SUSPEND_DISK)
+#ifdef CONFIG_SOFTWARE_SUSPEND
return 1;
+#else
+ return 0;
+#endif
/* all other states need lowlevel support and need to be
* valid to the lowlevel implementation, no valid callback
@@ -244,17 +248,6 @@ static int enter_state(suspend_state_t state)
return error;
}
-#ifdef CONFIG_SOFTWARE_SUSPEND
-/*
- * This is main interface to the outside world. It needs to be
- * called from process context.
- */
-int software_suspend(void)
-{
- return enter_state(PM_SUSPEND_DISK);
-}
-#endif
-
/**
* pm_suspend - Externally visible function for suspending system.
diff --git a/kernel/sys.c b/kernel/sys.c
index 123b165080e..fe1f3ab2047 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -881,7 +881,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
#ifdef CONFIG_SOFTWARE_SUSPEND
case LINUX_REBOOT_CMD_SW_SUSPEND:
{
- int ret = software_suspend();
+ int ret = pm_suspend(PM_SUSPEND_DISK);
unlock_kernel();
return ret;
}