mm/slab.c: remove unneed check in cpuup_canceled
nc is a member of percpu allocation memory, and cannot be NULL. Link: http://lkml.kernel.org/r/1553159353-5056-1-git-send-email-lirongqing@baidu.comSigned-off-by: NLi RongQing <lirongqing@baidu.com> Reviewed-by: NAndrew Morton <akpm@linux-foundation.org> Acked-by: NChristoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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