netdev - [patch 5/8] pcmcia net: use roundup_pow_of_two() macro instead of grotesque loop

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Date:	Wed, 21 Nov 2007 15:02:56 -0800
From:	akpm@...ux-foundation.org
To:	jeff@...zik.org
Cc:	netdev@...r.kernel.org, akpm@...ux-foundation.org,
	rpjday@...shcourse.ca, linux@...inikbrodowski.net
Subject: [patch 5/8] pcmcia net: use roundup_pow_of_two() macro instead of grotesque loop

From: "Robert P. J. Day" <rpjday@...shcourse.ca>

Signed-off-by: Robert P. J. Day <rpjday@...shcourse.ca>
Cc: Jeff Garzik <jeff@...zik.org>
Cc: Dominik Brodowski <linux@...inikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 drivers/net/pcmcia/pcnet_cs.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff -puN drivers/net/pcmcia/pcnet_cs.c~pcmcia-net-use-roundup_pow_of_two-macro-instead-of-grotesque-loop drivers/net/pcmcia/pcnet_cs.c
--- a/drivers/net/pcmcia/pcnet_cs.c~pcmcia-net-use-roundup_pow_of_two-macro-instead-of-grotesque-loop
+++ a/drivers/net/pcmcia/pcnet_cs.c
@@ -38,6 +38,7 @@
 #include <linux/delay.h>
 #include <linux/ethtool.h>
 #include <linux/netdevice.h>
+#include <linux/log2.h>
 #include "../8390.h"
 
 #include <pcmcia/cs_types.h>
@@ -1484,8 +1485,7 @@ static int setup_shmem_window(struct pcm
 	window_size = 32 * 1024;
 
     /* Make sure it's a power of two.  */
-    while ((window_size & (window_size - 1)) != 0)
-	window_size += window_size & ~(window_size - 1);
+    window_size = roundup_pow_of_two(window_size);
 
     /* Allocate a memory window */
     req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
_
-
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