wait_for_helper: remove unneeded do_sigaction()
allow_signal(SIGCHLD) does all necessary job, no need to call do_sigaction() prior to. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -185,14 +185,9 @@ static int wait_for_helper(void *data)
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{
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struct subprocess_info *sub_info = data;
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pid_t pid;
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struct k_sigaction sa;
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/* Install a handler: if SIGCLD isn't handled sys_wait4 won't
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* populate the status, but will return -ECHILD. */
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sa.sa.sa_handler = SIG_IGN;
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sa.sa.sa_flags = 0;
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siginitset(&sa.sa.sa_mask, sigmask(SIGCHLD));
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do_sigaction(SIGCHLD, &sa, NULL);
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allow_signal(SIGCHLD);
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pid = kernel_thread(____call_usermodehelper, sub_info, SIGCHLD);
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