padata: replace cpumask_weight with cpumask_empty in padata.c
padata_do_parallel() calls cpumask_weight() to check if any bit of a given cpumask is set. We can do it more efficiently with cpumask_empty() because cpumask_empty() stops traversing the cpumask as soon as it finds first set bit, while cpumask_weight() counts all bits unconditionally. Signed-off-by:Yury Norov <yury.norov@gmail.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au>
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28e9b6d8
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