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padata: Check for valid cpumasks
authorSteffen Klassert <steffen.klassert@secunet.com>
Tue, 20 Jul 2010 06:51:25 +0000 (08:51 +0200)
committerHerbert Xu <herbert@gondor.apana.org.au>
Mon, 26 Jul 2010 06:13:58 +0000 (14:13 +0800)
Now that we allow to change the cpumasks from userspace, we have
to check for valid cpumasks in padata_do_parallel. This patch adds
the necessary check. This fixes a division by zero crash if the
parallel cpumask contains no active cpu.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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