kernel/signal: remove unnecessary NULL values from ucounts

ucounts is assigned first, so it does not need to initialize the
assignment.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Li kunyu <[email protected]>
Acked-by: Oleg Nesterov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: likunyur

kernel/signal.c

@@ -415,7 +415,7 @@ __sigqueue_alloc(int sig, struct task_struct *t, gfp_t gfp_flags,
 		 int override_rlimit, const unsigned int sigqueue_flags)
 {
 	struct sigqueue *q = NULL;
-	struct ucounts *ucounts = NULL;
+	struct ucounts *ucounts;
 	long sigpending;
 
 	/*