From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758783Ab2AMSSJ (ORCPT ); Fri, 13 Jan 2012 13:18:09 -0500 Received: from mail-ww0-f42.google.com ([74.125.82.42]:39497 "EHLO mail-ww0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758659Ab2AMSP3 (ORCPT ); Fri, 13 Jan 2012 13:15:29 -0500 From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Paul Menage , Li Zefan , Johannes Weiner , Aditya Kali , Oleg Nesterov , Kay Sievers , Tim Hockin , Tejun Heo , Andrew Morton Subject: [PATCH 5/8] res_counter: allow charge failure pointer to be null Date: Fri, 13 Jan 2012 19:13:55 +0100 Message-Id: <1326478441-3048-12-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1326478441-3048-1-git-send-email-fweisbec@gmail.com> References: <1326478441-3048-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: Paul Menage Cc: Li Zefan Cc: Johannes Weiner Cc: Aditya Kali Cc: Oleg Nesterov Cc: Kay Sievers Cc: Tim Hockin Cc: Tejun Heo Acked-by: Kirill A. Shutemov Signed-off-by: Andrew Morton --- 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 86d72b8..644898a 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