linux-kernel - [PATCH] net/ipv4/fib_semantics.c: fix "symbol shadows an earlier one" noise

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Date:	Tue, 4 Aug 2009 17:36:34 -0700
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH] net/ipv4/fib_semantics.c: fix "symbol shadows an earlier one" noise

fib_sync_down_dev() uses a variable named 'nh' when doing a
hlist_for_each_entry loop.  Later the same variable name is used
in a change_nexthops loop.  This results in a sparse warning and is
potentially confusing.  Fix both issues by changing the name of
the outer loop variable.  The sparse warning is:

  warning: symbol 'nh' shadows an earlier one

Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>

---

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 9b096d6..b0e485a 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1065,17 +1065,17 @@ int fib_sync_down_dev(struct net_device *dev, int force)
 	unsigned int hash = fib_devindex_hashfn(dev->ifindex);
 	struct hlist_head *head = &fib_info_devhash[hash];
 	struct hlist_node *node;
-	struct fib_nh *nh;
+	struct fib_nh *this_nh;
 
 	if (force)
 		scope = -1;
 
-	hlist_for_each_entry(nh, node, head, nh_hash) {
-		struct fib_info *fi = nh->nh_parent;
+	hlist_for_each_entry(this_nh, node, head, nh_hash) {
+		struct fib_info *fi = this_nh->nh_parent;
 		int dead;
 
 		BUG_ON(!fi->fib_nhs);
-		if (nh->nh_dev != dev || fi == prev_fi)
+		if (this_nh->nh_dev != dev || fi == prev_fi)
 			continue;
 		prev_fi = fi;
 		dead = 0;
--
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