diff options
| author | John Stultz <[email protected]> | 2014-06-04 16:11:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2014-06-04 16:54:17 -0700 |
| commit | 81954606265ab8f04b41154bd00576013affcf5b (patch) | |
| tree | f320a8b4fb80586184c9dcba1974275f7aeca56d | |
| parent | 458df9fd4815b47809875d57f42e16401674b621 (diff) | |
printk: disable preemption for printk_sched
An earlier change in -mm (printk: remove separate printk_sched
buffers...), removed the printk_sched irqsave/restore lines since it was
safe for current users. Since we may be expanding usage of
printk_sched(), disable preepmtion for this function to make it more
generally safe to call.
Signed-off-by: John Stultz <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Jiri Bohac <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Steven Rostedt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | kernel/printk/printk.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 247b0c1fadfc..dc2b8bd9bc1e 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2590,12 +2590,14 @@ int printk_sched(const char *fmt, ...) va_list args; int r; + preempt_disable(); va_start(args, fmt); r = vprintk_emit(0, SCHED_MESSAGE_LOGLEVEL, NULL, 0, fmt, args); va_end(args); __this_cpu_or(printk_pending, PRINTK_PENDING_OUTPUT); irq_work_queue(&__get_cpu_var(wake_up_klogd_work)); + preempt_enable(); return r; } |