linux-kernel - [PATCH 1/2] signals: collect_signal: simplify the "still

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Message-ID: <20080527165857.GA1407@tv-sign.ru>
Date:	Tue, 27 May 2008 20:58:57 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Roland McGrath <roland@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] signals: collect_signal: simplify the "still_pending" logic

Factor out sigdelset() calls and remove the "still_pending" variable.

Signed-off-by: Oleg Nesterov <oleg@...sign.ru>
Acked-by: Roland McGrath <roland@...hat.com>

--- 26-rc2/kernel/signal.c~3_CLEANUP_STILL_PENDING	2008-05-27 18:37:10.000000000 +0400
+++ 26-rc2/kernel/signal.c	2008-05-27 19:06:55.000000000 +0400
@@ -341,7 +341,6 @@ unblock_all_signals(void)
 static int collect_signal(int sig, struct sigpending *list, siginfo_t *info)
 {
 	struct sigqueue *q, *first = NULL;
-	int still_pending = 0;
 
 	/*
 	 * Collect the siginfo appropriate to this signal.  Check if
@@ -349,26 +348,24 @@ static int collect_signal(int sig, struc
 	*/
 	list_for_each_entry(q, &list->list, list) {
 		if (q->info.si_signo == sig) {
-			if (first) {
-				still_pending = 1;
-				break;
-			}
+			if (first)
+				goto still_pending;
 			first = q;
 		}
 	}
+
+	sigdelset(&list->signal, sig);
+
 	if (first) {
+still_pending:
 		list_del_init(&first->list);
 		copy_siginfo(info, &first->info);
 		__sigqueue_free(first);
-		if (!still_pending)
-			sigdelset(&list->signal, sig);
 	} else {
-
 		/* Ok, it wasn't in the queue.  This must be
 		   a fast-pathed signal or we must have been
 		   out of queue space.  So zero out the info.
 		 */
-		sigdelset(&list->signal, sig);
 		info->si_signo = sig;
 		info->si_errno = 0;
 		info->si_code = 0;

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