linux-kernel - [PATCH net-next] xprtrdma: rpcrdma_register_default

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Message-Id: <1397850625-44074-1-git-send-email-tim.gardner@canonical.com>
Date:	Fri, 18 Apr 2014 13:50:25 -0600
From:	Tim Gardner <tim.gardner@...onical.com>
To:	linux-nfs@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Tim Gardner <tim.gardner@...onical.com>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH net-next] xprtrdma: rpcrdma_register_default_external: Silence frame size warning

net/sunrpc/xprtrdma/verbs.c: In function 'rpcrdma_register_default_external':
net/sunrpc/xprtrdma/verbs.c:1774:1: warning: the frame size of 1048 bytes is larger than 1024 bytes [-Wframe-larger-than=]

gcc version 4.8.2, x86_64-linux-gnu

Cc: Trond Myklebust <trond.myklebust@...marydata.com>
Cc: "J. Bruce Fields" <bfields@...ldses.org>
Cc: "David S. Miller" <davem@...emloft.net>
Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
---
 net/sunrpc/xprtrdma/verbs.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 93726560..8130349 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1736,9 +1736,13 @@ rpcrdma_register_default_external(struct rpcrdma_mr_seg *seg,
 	int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE :
 				  IB_ACCESS_REMOTE_READ);
 	struct rpcrdma_mr_seg *seg1 = seg;
-	struct ib_phys_buf ipb[RPCRDMA_MAX_DATA_SEGS];
+	struct ib_phys_buf *ipb;
 	int len, i, rc = 0;
 
+	ipb = kmalloc(sizeof(*ipb) * RPCRDMA_MAX_DATA_SEGS, GFP_ATOMIC);
+	if (!ipb)
+		return -ENOMEM;
+
 	if (*nsegs > RPCRDMA_MAX_DATA_SEGS)
 		*nsegs = RPCRDMA_MAX_DATA_SEGS;
 	for (len = 0, i = 0; i < *nsegs;) {
@@ -1770,6 +1774,8 @@ rpcrdma_register_default_external(struct rpcrdma_mr_seg *seg,
 		seg1->mr_len = len;
 	}
 	*nsegs = i;
+
+	kfree(ipb);
 	return rc;
 }
 
-- 
1.7.9.5

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