linux-kernel - Re: [patch 3/4] cpu alloc: The allocator

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Message-ID: <48D40C43.5070200@linux-foundation.org>
Date:	Fri, 19 Sep 2008 15:32:03 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	akpm@...ux-foundation.org
CC:	linux-kernel@...r.kernel.org, linux-mm@...ck.org, jeremy@...p.org,
	ebiederm@...ssion.com, travis@....com, herbert@...dor.apana.org.au,
	xemul@...nvz.org, penberg@...helsinki.fi
Subject: Re: [patch 3/4] cpu alloc: The allocator

Duh. A cast went missing which results in a pointer calculation going haywire.

Signed-off-by: <cl@...ux-foundation.org>

Index: linux-2.6/mm/cpu_alloc.c
===================================================================
--- linux-2.6.orig/mm/cpu_alloc.c	2008-09-19 14:57:25.000000000 -0500
+++ linux-2.6/mm/cpu_alloc.c	2008-09-19 14:57:33.000000000 -0500
@@ -126,7 +126,7 @@

 	spin_unlock_irqrestore(&cpu_alloc_map_lock, flags);

-	ptr = __per_cpu_end + start;
+	ptr = (int *)__per_cpu_end + start;

 	printk(KERN_INFO "%d per cpu units allocated at offset %lx address %p\n",
 		units, start, ptr)

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