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author | Takashi Iwai <tiwai@suse.de> | 2012-03-18 18:22:37 +0100 |
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committer | Takashi Iwai <tiwai@suse.de> | 2012-03-18 18:22:37 +0100 |
commit | cb3f2adc03ab055b19c677a6283523861fafebdd (patch) | |
tree | 59cfb6800f0635a4aec16c8e0da619f27e51ee79 /kernel/power/process.c | |
parent | 44c76a960a62fcc46cbcaa0a22a34e666a729329 (diff) | |
parent | 828006de1bddf83b6ecf03ec459c15f7c7c22db7 (diff) | |
download | op-kernel-dev-cb3f2adc03ab055b19c677a6283523861fafebdd.zip op-kernel-dev-cb3f2adc03ab055b19c677a6283523861fafebdd.tar.gz |
Merge branch 'topic/asoc' into for-linus
Diffstat (limited to 'kernel/power/process.c')
-rw-r--r-- | kernel/power/process.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/kernel/power/process.c b/kernel/power/process.c index 77274c9..7e42645 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -143,7 +143,10 @@ int freeze_processes(void) /** * freeze_kernel_threads - Make freezable kernel threads go to the refrigerator. * - * On success, returns 0. On failure, -errno and system is fully thawed. + * On success, returns 0. On failure, -errno and only the kernel threads are + * thawed, so as to give a chance to the caller to do additional cleanups + * (if any) before thawing the userspace tasks. So, it is the responsibility + * of the caller to thaw the userspace tasks, when the time is right. */ int freeze_kernel_threads(void) { @@ -159,7 +162,7 @@ int freeze_kernel_threads(void) BUG_ON(in_atomic()); if (error) - thaw_processes(); + thaw_kernel_threads(); return error; } @@ -188,3 +191,22 @@ 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"); +} |