linux-kernel - Subject: [PATCH] net/ipv6: Use GFP

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Date:	Sun, 30 May 2010 21:48:03 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	"Pekka Savola (ipv6)" <pekkas@...core.fi>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Subject: [PATCH] net/ipv6: Use GFP_ATOMIC when a lock is held

From: Julia Lawall <julia@...u.dk>

A spin lock is taken near the beginning of the enclosing function.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
@@

spin_lock(...)
... when != spin_unlock(...)
-GFP_KERNEL
+GFP_ATOMIC
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 net/ipv6/sit.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/net/ipv6/sit.c b/net/ipv6/sit.c
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -358,7 +358,7 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t
 		goto out;
 	}
 
-	p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL);
+	p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_ATOMIC);
 	if (!p) {
 		err = -ENOBUFS;
 		goto out;
--
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