From ab3bfca7abf3fd0fe41d26d839610a787aa7e587 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes@sipsolutions.net>
Date: Sun, 6 May 2007 14:50:49 -0700
Subject: [PATCH] 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>
---
drivers/acpi/sleep/proc.c | 2 +-
drivers/i2c/chips/tps65010.c | 4 +++-
include/linux/init.h | 2 +-
include/linux/suspend.h | 8 --------
kernel/power/main.c | 21 +++++++--------------
kernel/sys.c | 2 +-
6 files changed, 13 insertions(+), 26 deletions(-)
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 2d912b71e5435..dcde9ddd105ae 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 214fbb1423c5b..7ed92dc3d8333 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 9abf120ec9f84..dbbdbd1bec776 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 3cc4d6394c078..3aecc96acc767 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 5a779270cdbc6..f6dda685e7e2b 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 123b165080e65..fe1f3ab204772 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;
}
--
GitLab