netdev - [PATCH]is_power_of_2-net/core/neighbour.c

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Date:	Thu, 14 Jun 2007 16:04:47 +0530
From:	vignesh babu <vignesh.babu@...ro.com>
To:	roque@...fc.ul.pt, kuznet@....inr.ac.ru
Cc:	netdev@...r.kernel.org,
	Kernel Janitors List <kernel-janitors@...ts.osdl.org>
Subject: [PATCH]is_power_of_2-net/core/neighbour.c


Replacing (n & (n-1)) in the context of power of 2 checks
with is_power_of_2

Signed-off-by: vignesh babu <vignesh.babu@...ro.com>
--- 
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 6f3bb73..e663999 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -33,6 +33,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/random.h>
 #include <linux/string.h>
+#include <linux/log2.h>
 
 #define NEIGH_DEBUG 1
 
@@ -311,7 +312,7 @@ static void neigh_hash_grow(struct neigh_table *tbl, unsigned long new_entries)
 
 	NEIGH_CACHE_STAT_INC(tbl, hash_grows);
 
-	BUG_ON(new_entries & (new_entries - 1));
+	BUG_ON(!is_power_of_2(new_entries));
 	new_hash = neigh_hash_alloc(new_entries);
 	if (!new_hash)
 		return;

-- 
Vignesh Babu BM 
_____________________________________________________________ 
"Why is it that every time I'm with you, makes me believe in magic?"

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