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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2010-03-08 07:50:43 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2010-03-13 02:26:56 +0100 |
| commit | 52fbe9cde7fdb5c6fac196d7ebd2d92d05ef3cd4 (patch) | |
| tree | 77ec9beecf7a58ed06f59c589f122caf87ec4f0b /kernel/async.c | |
| parent | Merge branch 'tip/tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/... (diff) | |
| download | linux-52fbe9cde7fdb5c6fac196d7ebd2d92d05ef3cd4.tar.xz linux-52fbe9cde7fdb5c6fac196d7ebd2d92d05ef3cd4.zip | |
ring-buffer: Move disabled check into preempt disable section
The ring buffer resizing and resetting relies on a schedule RCU
action. The buffers are disabled, a synchronize_sched() is called
and then the resize or reset takes place.
But this only works if the disabling of the buffers are within the
preempt disabled section, otherwise a window exists that the buffers
can be written to while a reset or resize takes place.
Cc: stable@kernel.org
Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B949E43.2010906@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/async.c')
0 files changed, 0 insertions, 0 deletions