From: Johannes Berg Date: Sun, 6 May 2007 21:50:49 +0000 (-0700) Subject: remove software_suspend() X-Git-Tag: v2.6.22-rc1~897 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab3bfca7abf3fd0fe41d26d839610a787aa7e587;p=linux-2.6 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 Acked-by: "Rafael J. Wysocki" Cc: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c index 2d912b71e5..dcde9ddd10 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 214fbb1423..7ed92dc3d8 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 9abf120ec9..dbbdbd1bec 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 3cc4d6394c..3aecc96acc 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 5a779270cd..f6dda685e7 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 123b165080..fe1f3ab204 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; }