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| author | Thomas Gleixner | 2006-06-27 11:55:00 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2006-06-28 02:32:47 +0200 |
| commit | e74c69f46d93d29eea0ad8647863d1c6488f0f55 (patch) | |
| tree | 5537d5a60eec3985de11cad4476ed95025051721 | |
| parent | [PATCH] fix rt-mutex defaults and dependencies (diff) | |
| download | kernel-qcow2-linux-e74c69f46d93d29eea0ad8647863d1c6488f0f55.tar.gz kernel-qcow2-linux-e74c69f46d93d29eea0ad8647863d1c6488f0f55.tar.xz kernel-qcow2-linux-e74c69f46d93d29eea0ad8647863d1c6488f0f55.zip | |
[PATCH] Drop tasklist lock in do_sched_setscheduler
There is no need to hold tasklist_lock across the setscheduler call, when
we pin the task structure with get_task_struct(). Interrupts are disabled
in setscheduler anyway and the permission checks do not need interrupts
disabled.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | kernel/sched.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 08431f07a999..7a30addfd235 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4091,8 +4091,10 @@ do_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param) read_unlock_irq(&tasklist_lock); return -ESRCH; } - retval = sched_setscheduler(p, policy, &lparam); + get_task_struct(p); read_unlock_irq(&tasklist_lock); + retval = sched_setscheduler(p, policy, &lparam); + put_task_struct(p); return retval; } |