linux-kernel - [PATCHv4 11/11] Phonet: Use *_dec_not_zero instead of *_add

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Message-Id: <1311760070-21532-11-git-send-email-sven@narfation.org>
Date:	Wed, 27 Jul 2011 11:47:50 +0200
From:	Sven Eckelmann <sven@...fation.org>
To:	linux-arch@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Sven Eckelmann <sven@...fation.org>,
	Remi Denis-Courmont <remi.denis-courmont@...ia.com>
Subject: [PATCHv4 11/11] Phonet: Use *_dec_not_zero instead of *_add_unless

atomic_dec_not_zero is defined for each architecture through
<linux/atomic.h> to provide the functionality of
atomic_add_unless(x, -1, 0).

Signed-off-by: Sven Eckelmann <sven@...fation.org>
Cc: Remi Denis-Courmont <remi.denis-courmont@...ia.com>
---
 net/phonet/pep.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index f17fd84..b192c83 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -1013,7 +1013,7 @@ static int pipe_skb_send(struct sock *sk, struct sk_buff *skb)
 	int err;
 
 	if (pn_flow_safe(pn->tx_fc) &&
-	    !atomic_add_unless(&pn->tx_credits, -1, 0)) {
+	    !atomic_dec_not_zero(&pn->tx_credits)) {
 		kfree_skb(skb);
 		return -ENOBUFS;
 	}
-- 
1.7.5.4

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