diff options
| author | Grant Likely <grant.likely@secretlab.ca> | 2012-02-22 18:36:17 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2012-02-22 18:36:17 -0700 |
| commit | daefd89efc279b142bbb054577c2d706da211723 (patch) | |
| tree | 2298056232548f6f22d7bbff2662a2bbf64520de /kernel/power | |
| parent | 6e33aceda2d82126e9d08a39e21a15be0dd00a6c (diff) | |
| parent | f86bcc302a8c570dd0f5a50097a6af96a0e717c2 (diff) | |
Merge branch 'for_3.4/gpio/runtime-pm-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into gpio/next
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/process.c | 19 | ||||
| -rw-r--r-- | kernel/power/snapshot.c | 3 | ||||
| -rw-r--r-- | kernel/power/user.c | 9 |
3 files changed, 30 insertions, 1 deletions
diff --git a/kernel/power/process.c b/kernel/power/process.c index 77274c9ba2f..eeca00311f3 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -188,3 +188,22 @@ void thaw_processes(void) printk("done.\n"); } +void thaw_kernel_threads(void) +{ + struct task_struct *g, *p; + + pm_nosig_freezing = false; + printk("Restarting kernel threads ... "); + + thaw_workqueues(); + + read_lock(&tasklist_lock); + do_each_thread(g, p) { + if (p->flags & (PF_KTHREAD | PF_WQ_WORKER)) + __thaw_task(p); + } while_each_thread(g, p); + read_unlock(&tasklist_lock); + + schedule(); + printk("done.\n"); +} diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 1cf88900ec4..6a768e53700 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -812,7 +812,8 @@ unsigned int snapshot_additional_pages(struct zone *zone) unsigned int res; res = DIV_ROUND_UP(zone->spanned_pages, BM_BITS_PER_BLOCK); - res += DIV_ROUND_UP(res * sizeof(struct bm_block), PAGE_SIZE); + res += DIV_ROUND_UP(res * sizeof(struct bm_block), + LINKED_PAGE_DATA_SIZE); return 2 * res; } diff --git a/kernel/power/user.c b/kernel/power/user.c index 6b1ab7a8852..e5a21a85730 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -274,6 +274,15 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, swsusp_free(); memset(&data->handle, 0, sizeof(struct snapshot_handle)); data->ready = 0; + /* + * It is necessary to thaw kernel threads here, because + * SNAPSHOT_CREATE_IMAGE may be invoked directly after + * SNAPSHOT_FREE. In that case, if kernel threads were not + * thawed, the preallocation of memory carried out by + * hibernation_snapshot() might run into problems (i.e. it + * might fail or even deadlock). + */ + thaw_kernel_threads(); break; case SNAPSHOT_PREF_IMAGE_SIZE: |