diff options
Diffstat (limited to 'kernel/power/main.c')
-rw-r--r-- | kernel/power/main.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index c7eb4a833db5..454434716f35 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c | |||
@@ -19,6 +19,9 @@ | |||
19 | 19 | ||
20 | #include "power.h" | 20 | #include "power.h" |
21 | 21 | ||
22 | /*This is just an arbitrary number */ | ||
23 | #define FREE_PAGE_NUMBER (100) | ||
24 | |||
22 | DECLARE_MUTEX(pm_sem); | 25 | DECLARE_MUTEX(pm_sem); |
23 | 26 | ||
24 | struct pm_ops * pm_ops = NULL; | 27 | struct pm_ops * pm_ops = NULL; |
@@ -49,6 +52,7 @@ void pm_set_ops(struct pm_ops * ops) | |||
49 | static int suspend_prepare(suspend_state_t state) | 52 | static int suspend_prepare(suspend_state_t state) |
50 | { | 53 | { |
51 | int error = 0; | 54 | int error = 0; |
55 | unsigned int free_pages; | ||
52 | 56 | ||
53 | if (!pm_ops || !pm_ops->enter) | 57 | if (!pm_ops || !pm_ops->enter) |
54 | return -EPERM; | 58 | return -EPERM; |
@@ -60,6 +64,16 @@ static int suspend_prepare(suspend_state_t state) | |||
60 | goto Thaw; | 64 | goto Thaw; |
61 | } | 65 | } |
62 | 66 | ||
67 | if ((free_pages = nr_free_pages()) < FREE_PAGE_NUMBER) { | ||
68 | pr_debug("PM: free some memory\n"); | ||
69 | shrink_all_memory(FREE_PAGE_NUMBER - free_pages); | ||
70 | if (nr_free_pages() < FREE_PAGE_NUMBER) { | ||
71 | error = -ENOMEM; | ||
72 | printk(KERN_ERR "PM: No enough memory\n"); | ||
73 | goto Thaw; | ||
74 | } | ||
75 | } | ||
76 | |||
63 | if (pm_ops->prepare) { | 77 | if (pm_ops->prepare) { |
64 | if ((error = pm_ops->prepare(state))) | 78 | if ((error = pm_ops->prepare(state))) |
65 | goto Thaw; | 79 | goto Thaw; |