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author | Peter Zijlstra <peterz@infradead.org> | 2011-06-22 09:20:09 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2011-06-22 09:39:34 (GMT) |
commit | 4f2a8d3cf5e0486fd547633fa86c5d130ae98cad (patch) | |
tree | 4f60a635565fd63473e5c23f45745b3b502a1d52 /kernel/lockdep.c | |
parent | 0b5e1c5255e7ee8670e077e8224e5c2281229a5b (diff) | |
download | linux-fsl-qoriq-4f2a8d3cf5e0486fd547633fa86c5d130ae98cad.tar.xz |
printk: Fix console_sem vs logbuf_lock unlock race
Fix up the fallout from commit 0b5e1c5255 ("printk: Release
console_sem after logbuf_lock").
The reason for unlocking the console_sem under the logbuf_lock
is that a concurrent printk() might fill up the buffer but fail
to acquire the console sem, resulting in a missed write to the
console until a subsequent console_sem acquire/release cycle.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: efault@gmx.de
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1308734409.1022.14.camel@twins
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/lockdep.c')
0 files changed, 0 insertions, 0 deletions