X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=kernel%2Fpower%2Fmain.c;h=22bdc93cc03885096a5e29755e5f3f5aeadee68a;hb=6dec3cf5cdb600f39b9eac3349f6bf50eab87731;hp=c94cb9e95090997aa15050412f7fc6564c997d01;hpb=5a72e04df5470df0ec646029d31e5528167ab1a7;p=powerpc.git

diff --git a/kernel/power/main.c b/kernel/power/main.c
index c94cb9e950..22bdc93cc0 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -19,6 +19,9 @@
 
 #include "power.h"
 
+/*This is just an arbitrary number */
+#define FREE_PAGE_NUMBER (100)
+
 DECLARE_MUTEX(pm_sem);
 
 struct pm_ops * pm_ops = NULL;
@@ -49,6 +52,7 @@ void pm_set_ops(struct pm_ops * ops)
 static int suspend_prepare(suspend_state_t state)
 {
 	int error = 0;
+	unsigned int free_pages;
 
 	if (!pm_ops || !pm_ops->enter)
 		return -EPERM;
@@ -67,6 +71,16 @@ static int suspend_prepare(suspend_state_t state)
 		goto Thaw;
 	}
 
+	if ((free_pages = nr_free_pages()) < FREE_PAGE_NUMBER) {
+		pr_debug("PM: free some memory\n");
+		shrink_all_memory(FREE_PAGE_NUMBER - free_pages);
+		if (nr_free_pages() < FREE_PAGE_NUMBER) {
+			error = -ENOMEM;
+			printk(KERN_ERR "PM: No enough memory\n");
+			goto Thaw;
+		}
+	}
+
 	if (pm_ops->prepare) {
 		if ((error = pm_ops->prepare(state)))
 			goto Thaw;
@@ -129,11 +143,12 @@ static void suspend_finish(suspend_state_t state)
 
 
 
-static char * pm_states[] = {
+static char *pm_states[PM_SUSPEND_MAX] = {
 	[PM_SUSPEND_STANDBY]	= "standby",
 	[PM_SUSPEND_MEM]	= "mem",
+#ifdef CONFIG_SOFTWARE_SUSPEND
 	[PM_SUSPEND_DISK]	= "disk",
-	NULL,
+#endif
 };
 
 
@@ -194,7 +209,7 @@ int software_suspend(void)
 
 int pm_suspend(suspend_state_t state)
 {
-	if (state > PM_SUSPEND_ON && state < PM_SUSPEND_MAX)
+	if (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX)
 		return enter_state(state);
 	return -EINVAL;
 }