On Tue, 7 Feb 2012, Anton Vorontsov wrote:

> sysrq should grab the tasklist lock, otherwise calling force_sig() is
> not safe, as it might race with exiting task, which ->sighand might be
> set to NULL already.
> 
> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>

Acked-by: David Rientjes <rientjes@google.com>