linux-kernel - [PATCH 5/5] Use wait_copyout() in wait_task

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Message-Id: <1242036759-4025-6-git-send-email-v.mayatskih@gmail.com>
Date:	Mon, 11 May 2009 12:12:44 +0200
From:	Vitaly Mayatskikh <v.mayatskih@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Oleg Nesterov <oleg@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Roland McGrath <roland@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 5/5] Use wait_copyout() in wait_task_continued()

All copy-paste getrusage() and put_user() code in wait_task_* functions
is replaced by call to wait_copyout()

It makes no sense to do conditional siginfo's fill, wait_copyout() knows
how to handle it right.

Signed-off-by: Vitaly Mayatskikh <v.mayatskih@...il.com>
---
 kernel/exit.c |   23 ++++++++++-------------
 1 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index 1ff490d..690a1a6 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1416,19 +1416,16 @@ static int wait_task_continued(struct wait_opts *wo, struct task_struct *p)
 	get_task_struct(p);
 	read_unlock(&tasklist_lock);
 
-	if (!wo->wo_info) {
-		retval = wo->wo_rusage
-			? getrusage(p, RUSAGE_BOTH, wo->wo_rusage) : 0;
-		put_task_struct(p);
-		if (!retval && wo->wo_stat)
-			retval = put_user(0xffff, wo->wo_stat);
-		if (!retval)
-			retval = pid;
-	} else {
-		retval = wait_noreap_copyout(wo, p, pid, uid,
-					     CLD_CONTINUED, SIGCONT);
-		BUG_ON(retval == 0);
-	}
+	retval = wait_copyout(wo, p, pid, uid,
+			      CLD_CONTINUED, SIGCONT, SIGCHLD);
+	put_task_struct(p);
+
+	if (!retval && wo->wo_stat)
+		retval = put_user(0xffff, wo->wo_stat);
+	if (!retval)
+		retval = pid;
+
+	BUG_ON(retval == 0);
 
 	return retval;
 }
-- 
1.6.2.2

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