linux-kernel - [PATCH 05/10] res_counter: allow charge failure pointer to be null

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1328067470-5980-6-git-send-email-fweisbec@gmail.com>
Date:	Wed,  1 Feb 2012 04:37:45 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Li Zefan <lizf@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paul Menage <paul@...lmenage.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Aditya Kali <adityakali@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Tim Hockin <thockin@...kin.org>, Tejun Heo <htejun@...il.com>,
	Containers <containers@...ts.linux-foundation.org>,
	Glauber Costa <glommer@...il.com>,
	Cgroups <cgroups@...r.kernel.org>,
	Daniel J Walsh <dwalsh@...hat.com>,
	"Daniel P. Berrange" <berrange@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Max Kellermann <mk@...all.com>,
	Mandeep Singh Baines <msb@...omium.org>
Subject: [PATCH 05/10] res_counter: allow charge failure pointer to be null

So that callers of res_counter_charge() don't have to create and pass this
pointer even if they aren't interested in it.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Paul Menage <paul@...lmenage.org>
Cc: Li Zefan <lizf@...fujitsu.com>
Cc: Johannes Weiner <hannes@...xchg.org>
Cc: Aditya Kali <adityakali@...gle.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Tim Hockin <thockin@...kin.org>
Cc: Tejun Heo <htejun@...il.com>
Cc: Containers <containers@...ts.linux-foundation.org>
Cc: Glauber Costa <glommer@...il.com>
Cc: Cgroups <cgroups@...r.kernel.org>
Cc: Daniel J Walsh <dwalsh@...hat.com>
Cc: "Daniel P. Berrange" <berrange@...hat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: Max Kellermann <mk@...all.com>
Cc: Mandeep Singh Baines <msb@...omium.org>
Acked-by: Kirill A. Shutemov <kirill@...temov.name>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
 kernel/res_counter.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index 6dc6164..d2fc4cd 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c
@@ -43,14 +43,16 @@ int res_counter_charge_until(struct res_counter *counter,
 	unsigned long flags;
 	struct res_counter *c, *u;
 
-	*limit_fail_at = NULL;
+	if (limit_fail_at)
+		*limit_fail_at = NULL;
 	local_irq_save(flags);
 	for (c = counter; c != limit; c = c->parent) {
 		spin_lock(&c->lock);
 		ret = res_counter_charge_locked(c, val);
 		spin_unlock(&c->lock);
 		if (ret < 0) {
-			*limit_fail_at = c;
+			if (limit_fail_at)
+				*limit_fail_at = c;
 			goto undo;
 		}
 	}
-- 
1.7.5.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/