X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fpower%2Fmain.c;h=3cdf95b1dc92af97e13e8a6c68c4e0a6f8d42153;hb=ca6435f188a0ce40eae716c158053e49130886a3;hp=32147b57c3bfb419f0950b7abafe88aa207984a5;hpb=2fe83b3ad12d43799af5f3156886eca443a88bac;p=linux-2.6 diff --git a/kernel/power/main.c b/kernel/power/main.c index 32147b57c3..3cdf95b1dc 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -20,49 +20,45 @@ #include #include #include +#include #include "power.h" BLOCKING_NOTIFIER_HEAD(pm_chain_head); -/*This is just an arbitrary number */ -#define FREE_PAGE_NUMBER (100) - DEFINE_MUTEX(pm_mutex); -struct pm_ops *pm_ops; +#ifdef CONFIG_SUSPEND + +/* This is just an arbitrary number */ +#define FREE_PAGE_NUMBER (100) + +static struct platform_suspend_ops *suspend_ops; /** - * pm_set_ops - Set the global power method table. + * suspend_set_ops - Set the global suspend method table. * @ops: Pointer to ops structure. */ -void pm_set_ops(struct pm_ops * ops) +void suspend_set_ops(struct platform_suspend_ops *ops) { mutex_lock(&pm_mutex); - pm_ops = ops; + suspend_ops = ops; mutex_unlock(&pm_mutex); } /** - * pm_valid_only_mem - generic memory-only valid callback + * suspend_valid_only_mem - generic memory-only valid callback * - * pm_ops drivers that implement mem suspend only and only need + * Platform drivers that implement mem suspend only and only need * to check for that in their .valid callback can use this instead * of rolling their own .valid callback. */ -int pm_valid_only_mem(suspend_state_t state) +int suspend_valid_only_mem(suspend_state_t state) { return state == PM_SUSPEND_MEM; } - -static inline void pm_finish(suspend_state_t state) -{ - if (pm_ops->finish) - pm_ops->finish(state); -} - /** * suspend_prepare - Do prep work before entering low-power state. * @@ -74,7 +70,7 @@ static int suspend_prepare(void) int error; unsigned int free_pages; - if (!pm_ops || !pm_ops->enter) + if (!suspend_ops || !suspend_ops->enter) return -EPERM; error = pm_notifier_call_chain(PM_SUSPEND_PREPARE); @@ -126,7 +122,7 @@ void __attribute__ ((weak)) arch_suspend_enable_irqs(void) * * This function should be called after devices have been suspended. */ -int suspend_enter(suspend_state_t state) +static int suspend_enter(suspend_state_t state) { int error = 0; @@ -137,7 +133,7 @@ int suspend_enter(suspend_state_t state) printk(KERN_ERR "Some devices failed to power down\n"); goto Done; } - error = pm_ops->enter(state); + error = suspend_ops->enter(state); device_power_up(); Done: arch_suspend_enable_irqs(); @@ -154,11 +150,11 @@ int suspend_devices_and_enter(suspend_state_t state) { int error; - if (!pm_ops) + if (!suspend_ops) return -ENOSYS; - if (pm_ops->set_target) { - error = pm_ops->set_target(state); + if (suspend_ops->set_target) { + error = suspend_ops->set_target(state); if (error) return error; } @@ -168,8 +164,8 @@ int suspend_devices_and_enter(suspend_state_t state) printk(KERN_ERR "Some devices failed to suspend\n"); goto Resume_console; } - if (pm_ops->prepare) { - error = pm_ops->prepare(state); + if (suspend_ops->prepare) { + error = suspend_ops->prepare(); if (error) goto Resume_devices; } @@ -178,7 +174,8 @@ int suspend_devices_and_enter(suspend_state_t state) suspend_enter(state); enable_nonboot_cpus(); - pm_finish(state); + if (suspend_ops->finish) + suspend_ops->finish(); Resume_devices: device_resume(); Resume_console: @@ -212,7 +209,7 @@ static inline int valid_state(suspend_state_t state) /* All states need lowlevel support and need to be valid * to the lowlevel implementation, no valid callback * implies that none are valid. */ - if (!pm_ops || !pm_ops->valid || !pm_ops->valid(state)) + if (!suspend_ops || !suspend_ops->valid || !suspend_ops->valid(state)) return 0; return 1; } @@ -234,9 +231,14 @@ static int enter_state(suspend_state_t state) if (!valid_state(state)) return -ENODEV; + if (!mutex_trylock(&pm_mutex)) return -EBUSY; + printk("Syncing filesystems ... "); + sys_sync(); + printk("done.\n"); + pr_debug("PM: Preparing system for %s sleep\n", pm_states[state]); if ((error = suspend_prepare())) goto Unlock; @@ -269,6 +271,8 @@ int pm_suspend(suspend_state_t state) EXPORT_SYMBOL(pm_suspend); +#endif /* CONFIG_SUSPEND */ + decl_subsys(power,NULL,NULL); @@ -285,14 +289,16 @@ decl_subsys(power,NULL,NULL); static ssize_t state_show(struct kset *kset, char *buf) { + char *s = buf; +#ifdef CONFIG_SUSPEND int i; - char * s = buf; for (i = 0; i < PM_SUSPEND_MAX; i++) { if (pm_states[i] && valid_state(i)) s += sprintf(s,"%s ", pm_states[i]); } -#ifdef CONFIG_SOFTWARE_SUSPEND +#endif +#ifdef CONFIG_HIBERNATION s += sprintf(s, "%s\n", "disk"); #else if (s != buf) @@ -304,11 +310,13 @@ static ssize_t state_show(struct kset *kset, char *buf) static ssize_t state_store(struct kset *kset, const char *buf, size_t n) { +#ifdef CONFIG_SUSPEND suspend_state_t state = PM_SUSPEND_STANDBY; const char * const *s; +#endif char *p; - int error; int len; + int error = -EINVAL; p = memchr(buf, '\n', n); len = p ? p - buf : n; @@ -316,17 +324,19 @@ static ssize_t state_store(struct kset *kset, const char *buf, size_t n) /* First, check if we are requested to hibernate */ if (len == 4 && !strncmp(buf, "disk", len)) { error = hibernate(); - return error ? error : n; + goto Exit; } +#ifdef CONFIG_SUSPEND for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) { if (*s && len == strlen(*s) && !strncmp(buf, *s, len)) break; } if (state < PM_SUSPEND_MAX && *s) error = enter_state(state); - else - error = -EINVAL; +#endif + + Exit: return error ? error : n; }