[PATCH 4/4] INIT_SIGHAND: use SIG_DFL instead of NULL

[Oleg Nesterov]

Cosmetic, no changes in the compiled code. Just s/NULL/SIG_DFL/ to make
it more readable and grep-friendly.

Note: probably SIG_IGN makes more sense, we could kill ignore_signals().
But then kernel_init() should do flush_signal_handlers() before exec().

Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
---

 include/linux/init_task.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 34-rc1/include/linux/init_task.h~4_INIT_SIGHAND_USE_SIG_DFL	2010-05-10 20:26:08.000000000 +0200
+++ 34-rc1/include/linux/init_task.h	2010-05-10 21:06:03.000000000 +0200
@@ -43,7 +43,7 @@ extern struct nsproxy init_nsproxy;
 
 #define INIT_SIGHAND(sighand) {						\
 	.count		= ATOMIC_INIT(1), 				\
-	.action		= { { { .sa_handler = NULL, } }, },		\
+	.action		= { { { .sa_handler = SIG_DFL, } }, },		\
 	.siglock	= __SPIN_LOCK_UNLOCKED(sighand.siglock),	\
 	.signalfd_wqh	= __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),	\
 }

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