[PATCH RESEND2 11/11] signals: change wait_for_helper() to use kernel_sigaction()

[Oleg Nesterov]

Now that we have kernel_sigaction() we can change wait_for_helper()
to use it and cleanups the code a bit.

Signed-off-by: Oleg Nesterov <o...@redhat.com>
---
 kernel/kmod.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/kernel/kmod.c b/kernel/kmod.c
index 6b375af..c18c891 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -285,10 +285,7 @@ static int wait_for_helper(void *data)
        pid_t pid;
 
        /* If SIGCLD is ignored sys_wait4 won't populate the status. */
-       spin_lock_irq(&current->sighand->siglock);
-       current->sighand->action[SIGCHLD-1].sa.sa_handler = SIG_DFL;
-       spin_unlock_irq(&current->sighand->siglock);
-
+       kernel_sigaction(SIGCHLD, SIG_DFL);
        pid = kernel_thread(____call_usermodehelper, sub_info, SIGCHLD);
        if (pid < 0) {
                sub_info->retval = pid;
-- 
1.5.5.1

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