linux-kernel - [KJ][PATCH]is_power_of

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Date:	Thu, 07 Jun 2007 15:27:43 +0530
From:	vignesh babu <vignesh.babu@...ro.com>
To:	wli@...omorphy.com, davem@...p.rutgers.edu, zaitcev@...oo.com,
	ecd@...net.be, jj@...site.mff.cuni.cz, anton@...ba.org
Cc:	sparclinux@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Kernel Janitors List <kernel-janitors@...ts.osdl.org>
Subject: [KJ][PATCH]is_power_of_2-sparc/mm/srmmu.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/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index e5eaa80..741d303 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -19,6 +19,7 @@
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/kdebug.h>
+#include <linux/log2.h>

#include <asm/bitext.h>
#include <asm/page.h>
@@ -354,7 +355,7 @@ void srmmu_free_nocache(unsigned long vaddr, int
size)
    vaddr, srmmu_nocache_end);
BUG();
}
- if (size & (size-1)) {
+ if (!is_power_of_2(size)) {
printk("Size 0x%x is not a power of 2\n", size);
BUG();
}

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

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