netdev - [PATCH]is_power_of_2-cxgb3/cxgb3

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Date:	Tue, 12 Jun 2007 10:30:57 +0530
From:	vignesh babu <vignesh.babu@...ro.com>
To:	akpm <akpm@...ux-foundation.org>, jgarzik@...ox.com
Cc:	netdev@...r.kernel.org,
	Kernel Janitors List <kernel-janitors@...ts.osdl.org>
Subject: [PATCH]is_power_of_2-cxgb3/cxgb3_main.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/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index 1b20f40..a124b33 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -43,6 +43,7 @@
 #include <linux/proc_fs.h>
 #include <linux/rtnetlink.h>
 #include <linux/firmware.h>
+#include <linux/log2.h>
 #include <asm/uaccess.h>
 
 #include "common.h"
@@ -1818,8 +1819,8 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
 			return -EBUSY;
 		if (copy_from_user(&m, useraddr, sizeof(m)))
 			return -EFAULT;
-		if (!m.rx_pg_sz || (m.rx_pg_sz & (m.rx_pg_sz - 1)) ||
-			!m.tx_pg_sz || (m.tx_pg_sz & (m.tx_pg_sz - 1)))
+		if (!is_power_of_2(m.rx_pg_sz) ||
+			!is_power_of_2(m.tx_pg_sz))
 			return -EINVAL;	/* not power of 2 */
 		if (!(m.rx_pg_sz & 0x14000))
 			return -EINVAL;	/* not 16KB or 64KB */

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

-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html