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If we fail to setup the signal stack frame then we don't need to restore current->blocked because it is not modified by setup_signal_stack_*. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Richard Weinberger <richard@nod.at> Tested-by: Richard Weinberger <richard@nod.at> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>