Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH 1/3] PM / sleep: Add state field to pm_states[] entries | Date | Fri, 23 May 2014 01:22:24 +0200 |
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From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
To allow sleep states corresponding to the "mem", "standby" and "freeze" lables to be different from the pm_states[] indexes of those strings, introduce struct pm_sleep_state, consisting of a string label and a state number, and turn pm_states[] into an array of objects of that type.
This modification should not lead to any functional changes.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> --- kernel/power/main.c | 14 +++++++------- kernel/power/power.h | 7 ++++++- kernel/power/suspend.c | 12 ++++++------ kernel/power/suspend_test.c | 20 +++++++++----------- 4 files changed, 28 insertions(+), 25 deletions(-)
Index: linux-pm/kernel/power/power.h =================================================================== --- linux-pm.orig/kernel/power/power.h +++ linux-pm/kernel/power/power.h @@ -178,8 +178,13 @@ extern void swsusp_show_speed(struct tim unsigned int, char *); #ifdef CONFIG_SUSPEND +struct pm_sleep_state { + const char *label; + suspend_state_t state; +}; + /* kernel/power/suspend.c */ -extern const char *const pm_states[]; +extern struct pm_sleep_state pm_states[]; extern bool valid_state(suspend_state_t state); extern int suspend_devices_and_enter(suspend_state_t state); Index: linux-pm/kernel/power/suspend.c =================================================================== --- linux-pm.orig/kernel/power/suspend.c +++ linux-pm/kernel/power/suspend.c @@ -31,10 +31,10 @@ #include "power.h" -const char *const pm_states[PM_SUSPEND_MAX] = { - [PM_SUSPEND_FREEZE] = "freeze", - [PM_SUSPEND_STANDBY] = "standby", - [PM_SUSPEND_MEM] = "mem", +struct pm_sleep_state pm_states[PM_SUSPEND_MAX] = { + [PM_SUSPEND_FREEZE] = { "freeze", PM_SUSPEND_FREEZE }, + [PM_SUSPEND_STANDBY] = { "standby", PM_SUSPEND_STANDBY }, + [PM_SUSPEND_MEM] = { "mem", PM_SUSPEND_MEM }, }; static const struct platform_suspend_ops *suspend_ops; @@ -358,7 +358,7 @@ static int enter_state(suspend_state_t s sys_sync(); printk("done.\n"); - pr_debug("PM: Preparing system for %s sleep\n", pm_states[state]); + pr_debug("PM: Preparing system for %s sleep\n", pm_states[state].label); error = suspend_prepare(state); if (error) goto Unlock; @@ -366,7 +366,7 @@ static int enter_state(suspend_state_t s if (suspend_test(TEST_FREEZER)) goto Finish; - pr_debug("PM: Entering %s sleep\n", pm_states[state]); + pr_debug("PM: Entering %s sleep\n", pm_states[state].label); pm_restrict_gfp_mask(); error = suspend_devices_and_enter(state); pm_restore_gfp_mask(); Index: linux-pm/kernel/power/suspend_test.c =================================================================== --- linux-pm.orig/kernel/power/suspend_test.c +++ linux-pm/kernel/power/suspend_test.c @@ -92,13 +92,13 @@ static void __init test_wakealarm(struct } if (state == PM_SUSPEND_MEM) { - printk(info_test, pm_states[state]); + printk(info_test, pm_states[state].label); status = pm_suspend(state); if (status == -ENODEV) state = PM_SUSPEND_STANDBY; } if (state == PM_SUSPEND_STANDBY) { - printk(info_test, pm_states[state]); + printk(info_test, pm_states[state].label); status = pm_suspend(state); } if (status < 0) @@ -140,14 +140,12 @@ static int __init setup_test_suspend(cha /* "=mem" ==> "mem" */ value++; - for (i = 0; i < PM_SUSPEND_MAX; i++) { - if (!pm_states[i]) - continue; - if (strcmp(pm_states[i], value) != 0) - continue; - test_state = (__force suspend_state_t) i; - return 0; - } + for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++) + if (!strcmp(pm_states[i].label, value)) { + test_state = pm_states[i].state; + return 0; + } + printk(warn_bad_state, value); return 0; } @@ -165,7 +163,7 @@ static int __init test_suspend(void) if (test_state == PM_SUSPEND_ON) goto done; if (!valid_state(test_state)) { - printk(warn_bad_state, pm_states[test_state]); + printk(warn_bad_state, pm_states[test_state].label); goto done; } Index: linux-pm/kernel/power/main.c =================================================================== --- linux-pm.orig/kernel/power/main.c +++ linux-pm/kernel/power/main.c @@ -295,10 +295,10 @@ static ssize_t state_show(struct kobject #ifdef CONFIG_SUSPEND int i; - for (i = 0; i < PM_SUSPEND_MAX; i++) { - if (pm_states[i] && valid_state(i)) - s += sprintf(s,"%s ", pm_states[i]); - } + for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++) + if (valid_state(i)) + s += sprintf(s,"%s ", pm_states[i].label); + #endif #ifdef CONFIG_HIBERNATION s += sprintf(s, "%s\n", "disk"); @@ -314,7 +314,7 @@ static suspend_state_t decode_state(cons { #ifdef CONFIG_SUSPEND suspend_state_t state = PM_SUSPEND_MIN; - const char * const *s; + struct pm_sleep_state *s; #endif char *p; int len; @@ -328,7 +328,7 @@ static suspend_state_t decode_state(cons #ifdef CONFIG_SUSPEND for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) - if (*s && len == strlen(*s) && !strncmp(buf, *s, len)) + if (len == strlen(s->label) && !strncmp(buf, s->label, len)) return state; #endif @@ -448,7 +448,7 @@ static ssize_t autosleep_show(struct kob #ifdef CONFIG_SUSPEND if (state < PM_SUSPEND_MAX) return sprintf(buf, "%s\n", valid_state(state) ? - pm_states[state] : "error"); + pm_states[state].label : "error"); #endif #ifdef CONFIG_HIBERNATION return sprintf(buf, "disk\n");
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