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-rw-r--r--kernel/power/main.c26
1 files changed, 18 insertions, 8 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c
index cfba6987ae7d..350b485b3b60 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -25,11 +25,13 @@
25 25
26BLOCKING_NOTIFIER_HEAD(pm_chain_head); 26BLOCKING_NOTIFIER_HEAD(pm_chain_head);
27 27
28/*This is just an arbitrary number */
29#define FREE_PAGE_NUMBER (100)
30
31DEFINE_MUTEX(pm_mutex); 28DEFINE_MUTEX(pm_mutex);
32 29
30#ifdef CONFIG_SUSPEND
31
32/* This is just an arbitrary number */
33#define FREE_PAGE_NUMBER (100)
34
33struct pm_ops *pm_ops; 35struct pm_ops *pm_ops;
34 36
35/** 37/**
@@ -269,6 +271,8 @@ int pm_suspend(suspend_state_t state)
269 271
270EXPORT_SYMBOL(pm_suspend); 272EXPORT_SYMBOL(pm_suspend);
271 273
274#endif /* CONFIG_SUSPEND */
275
272decl_subsys(power,NULL,NULL); 276decl_subsys(power,NULL,NULL);
273 277
274 278
@@ -285,13 +289,15 @@ decl_subsys(power,NULL,NULL);
285 289
286static ssize_t state_show(struct kset *kset, char *buf) 290static ssize_t state_show(struct kset *kset, char *buf)
287{ 291{
292 char *s = buf;
293#ifdef CONFIG_SUSPEND
288 int i; 294 int i;
289 char * s = buf;
290 295
291 for (i = 0; i < PM_SUSPEND_MAX; i++) { 296 for (i = 0; i < PM_SUSPEND_MAX; i++) {
292 if (pm_states[i] && valid_state(i)) 297 if (pm_states[i] && valid_state(i))
293 s += sprintf(s,"%s ", pm_states[i]); 298 s += sprintf(s,"%s ", pm_states[i]);
294 } 299 }
300#endif
295#ifdef CONFIG_HIBERNATION 301#ifdef CONFIG_HIBERNATION
296 s += sprintf(s, "%s\n", "disk"); 302 s += sprintf(s, "%s\n", "disk");
297#else 303#else
@@ -304,11 +310,13 @@ static ssize_t state_show(struct kset *kset, char *buf)
304 310
305static ssize_t state_store(struct kset *kset, const char *buf, size_t n) 311static ssize_t state_store(struct kset *kset, const char *buf, size_t n)
306{ 312{
313#ifdef CONFIG_SUSPEND
307 suspend_state_t state = PM_SUSPEND_STANDBY; 314 suspend_state_t state = PM_SUSPEND_STANDBY;
308 const char * const *s; 315 const char * const *s;
316#endif
309 char *p; 317 char *p;
310 int error;
311 int len; 318 int len;
319 int error = -EINVAL;
312 320
313 p = memchr(buf, '\n', n); 321 p = memchr(buf, '\n', n);
314 len = p ? p - buf : n; 322 len = p ? p - buf : n;
@@ -316,17 +324,19 @@ static ssize_t state_store(struct kset *kset, const char *buf, size_t n)
316 /* First, check if we are requested to hibernate */ 324 /* First, check if we are requested to hibernate */
317 if (len == 4 && !strncmp(buf, "disk", len)) { 325 if (len == 4 && !strncmp(buf, "disk", len)) {
318 error = hibernate(); 326 error = hibernate();
319 return error ? error : n; 327 goto Exit;
320 } 328 }
321 329
330#ifdef CONFIG_SUSPEND
322 for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) { 331 for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) {
323 if (*s && len == strlen(*s) && !strncmp(buf, *s, len)) 332 if (*s && len == strlen(*s) && !strncmp(buf, *s, len))
324 break; 333 break;
325 } 334 }
326 if (state < PM_SUSPEND_MAX && *s) 335 if (state < PM_SUSPEND_MAX && *s)
327 error = enter_state(state); 336 error = enter_state(state);
328 else 337#endif
329 error = -EINVAL; 338
339 Exit:
330 return error ? error : n; 340 return error ? error : n;
331} 341}
332 342