From: vignesh babu <vignesh.babu@wipro.com>
Date: Mon, 16 Jul 2007 06:41:34 +0000 (-0700)
Subject: is_power_of_2: kernel/kfifo.c
X-Git-Tag: v2.6.23-rc1~827
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f84d5a76c50d9752cdec64a6e536ee3901b267f6;p=linux-2.6

is_power_of_2: kernel/kfifo.c

Replace (n & (n-1)) with is_power_of_2()

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Acked-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/kfifo.c b/kernel/kfifo.c
index cee419143f..bc41ad0f24 100644
--- a/kernel/kfifo.c
+++ b/kernel/kfifo.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/kfifo.h>
+#include <linux/log2.h>
 
 /**
  * kfifo_init - allocates a new FIFO using a preallocated buffer
@@ -41,7 +42,7 @@ struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size,
 	struct kfifo *fifo;
 
 	/* size must be a power of 2 */
-	BUG_ON(size & (size - 1));
+	BUG_ON(!is_power_of_2(size));
 
 	fifo = kmalloc(sizeof(struct kfifo), gfp_mask);
 	if (!fifo)