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From: vignesh babu <vignesh.babu@wipro.com>
To: clameter@sgi.com
Cc: linux-mm@kvack.org, linux-kernel <linux-kernel@vger.kernel.org>,
	Kernel Janitors List <kernel-janitors@lists.osdl.org>
Subject: [kj] is_power_of_2 in mm/slub.c
Date: Mon, 13 Aug 2007 13:15:13 +0000	[thread overview]
Message-ID: <1187010193.7273.15.camel@merlin.linuxcoe.com> (raw)

Replacing n & (n - 1) for power of 2 check by is_power_of_2(n)

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
---
diff --git a/mm/slub.c b/mm/slub.c
index 69d02e3..1241d14 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -20,6 +20,7 @@
 #include <linux/mempolicy.h>
 #include <linux/ctype.h>
 #include <linux/kallsyms.h>
+#include <linux/log2.h>
 
 /*
  * Lock order:
@@ -2606,7 +2607,7 @@ void __init kmem_cache_init(void)
 	 * around with ARCH_KMALLOC_MINALIGN
 	 */
 	BUILD_BUG_ON(KMALLOC_MIN_SIZE > 256 ||
-		(KMALLOC_MIN_SIZE & (KMALLOC_MIN_SIZE - 1)));
+		!is_power_of_2(KMALLOC_MIN_SIZE));
 
 	for (i = 8; i < KMALLOC_MIN_SIZE; i += 8)
 		size_index[(i - 1) / 8] = KMALLOC_SHIFT_LOW;

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

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WARNING: multiple messages have this Message-ID (diff)
From: vignesh babu <vignesh.babu@wipro.com>
To: clameter@sgi.com
Cc: linux-mm@kvack.org, linux-kernel <linux-kernel@vger.kernel.org>,
	Kernel Janitors List <kernel-janitors@lists.osdl.org>
Subject: [kj] is_power_of_2 in mm/slub.c
Date: Mon, 13 Aug 2007 18:33:13 +0530	[thread overview]
Message-ID: <1187010193.7273.15.camel@merlin.linuxcoe.com> (raw)

Replacing n & (n - 1) for power of 2 check by is_power_of_2(n)

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
---
diff --git a/mm/slub.c b/mm/slub.c
index 69d02e3..1241d14 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -20,6 +20,7 @@
 #include <linux/mempolicy.h>
 #include <linux/ctype.h>
 #include <linux/kallsyms.h>
+#include <linux/log2.h>
 
 /*
  * Lock order:
@@ -2606,7 +2607,7 @@ void __init kmem_cache_init(void)
 	 * around with ARCH_KMALLOC_MINALIGN
 	 */
 	BUILD_BUG_ON(KMALLOC_MIN_SIZE > 256 ||
-		(KMALLOC_MIN_SIZE & (KMALLOC_MIN_SIZE - 1)));
+		!is_power_of_2(KMALLOC_MIN_SIZE));
 
 	for (i = 8; i < KMALLOC_MIN_SIZE; i += 8)
 		size_index[(i - 1) / 8] = KMALLOC_SHIFT_LOW;

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


WARNING: multiple messages have this Message-ID (diff)
From: vignesh babu <vignesh.babu@wipro.com>
To: clameter@sgi.com
Cc: linux-mm@kvack.org, linux-kernel <linux-kernel@vger.kernel.org>,
	Kernel Janitors List <kernel-janitors@lists.osdl.org>
Subject: [kj] is_power_of_2 in mm/slub.c
Date: Mon, 13 Aug 2007 18:33:13 +0530	[thread overview]
Message-ID: <1187010193.7273.15.camel@merlin.linuxcoe.com> (raw)

Replacing n & (n - 1) for power of 2 check by is_power_of_2(n)

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
---
diff --git a/mm/slub.c b/mm/slub.c
index 69d02e3..1241d14 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -20,6 +20,7 @@
 #include <linux/mempolicy.h>
 #include <linux/ctype.h>
 #include <linux/kallsyms.h>
+#include <linux/log2.h>
 
 /*
  * Lock order:
@@ -2606,7 +2607,7 @@ void __init kmem_cache_init(void)
 	 * around with ARCH_KMALLOC_MINALIGN
 	 */
 	BUILD_BUG_ON(KMALLOC_MIN_SIZE > 256 ||
-		(KMALLOC_MIN_SIZE & (KMALLOC_MIN_SIZE - 1)));
+		!is_power_of_2(KMALLOC_MIN_SIZE));
 
 	for (i = 8; i < KMALLOC_MIN_SIZE; i += 8)
 		size_index[(i - 1) / 8] = KMALLOC_SHIFT_LOW;

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

--
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             reply	other threads:[~2007-08-13 13:15 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-13 13:03 vignesh babu [this message]
2007-08-13 13:15 ` [kj] is_power_of_2 in mm/slub.c vignesh babu
2007-08-13 13:03 ` vignesh babu
2007-08-13 20:48 ` Christoph Lameter
2007-08-13 20:48   ` Christoph Lameter
2007-08-13 20:48   ` Christoph Lameter
  -- strict thread matches above, loose matches on Subject: below --
2007-08-13 13:03 vignesh babu

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