diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-07-19 01:47:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 10:04:42 -0700 |
| commit | e7cd8a722745a01bcfac4d4a52d53391d177da20 (patch) | |
| tree | 45c7e57cac39a6aa90d1c5f6682ddd12bdc8315a /kernel/power | |
| parent | f4a3a7d60c9c9a961e4c970f6eb41dd1c9d3ec21 (diff) | |
Freezer: return int from freeze_processes
Make try_to_freeze_tasks() and freeze_processes() return -EBUSY on failure
instead of the number of unfrozen tasks (none of the callers actually uses
this number).
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/process.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/kernel/power/process.c b/kernel/power/process.c index 9b5301c73b8..00cdbe5f518 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -105,7 +105,7 @@ static void cancel_freezing(struct task_struct *p) } } -static unsigned int try_to_freeze_tasks(int freeze_user_space) +static int try_to_freeze_tasks(int freeze_user_space) { struct task_struct *g, *p; unsigned long end_time; @@ -176,28 +176,25 @@ static unsigned int try_to_freeze_tasks(int freeze_user_space) read_unlock(&tasklist_lock); } - return todo; + return todo ? -EBUSY : 0; } /** * freeze_processes - tell processes to enter the refrigerator - * - * Returns 0 on success, or the number of processes that didn't freeze, - * although they were told to. */ int freeze_processes(void) { - unsigned int nr_unfrozen; + int error; printk("Stopping tasks ... "); - nr_unfrozen = try_to_freeze_tasks(FREEZER_USER_SPACE); - if (nr_unfrozen) - return nr_unfrozen; + error = try_to_freeze_tasks(FREEZER_USER_SPACE); + if (error) + return error; sys_sync(); - nr_unfrozen = try_to_freeze_tasks(FREEZER_KERNEL_THREADS); - if (nr_unfrozen) - return nr_unfrozen; + error = try_to_freeze_tasks(FREEZER_KERNEL_THREADS); + if (error) + return error; printk("done.\n"); BUG_ON(in_atomic()); |