linux-kernel - Re: [PATCH] [ARM] 5435/1: fix compile warning in sanity_check

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Date:	Sat, 28 Mar 2009 20:30:26 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	stable@...nel.org,
	Linux Kernel Mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [ARM] 5435/1: fix compile warning in sanity_check_meminfo()

From: Mikael Pettersson <mikpe@...uu.se>

Compiling recent 2.6.29-rc kernels for ARM gives me the following warning:

arch/arm/mm/mmu.c: In function 'sanity_check_meminfo':
arch/arm/mm/mmu.c:697: warning: comparison between pointer and integer

This is because commit 3fd9825c42c784a59b3b90bdf073f49d4bb42a8d
"[ARM] 5402/1: fix a case of wrap-around in sanity_check_meminfo()"
in 2.6.29-rc5-git4 added a comparison of a pointer with PAGE_OFFSET,
which is an integer.

Fixed by casting PAGE_OFFSET to void *.

Signed-off-by: Mikael Pettersson <mikpe@...uu.se>
Acked-by: Nicolas Pitre <nico@....org>
Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
---
 arch/arm/mm/mmu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index d4d082c..5a89e57 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -694,7 +694,7 @@ static void __init sanity_check_meminfo(void)
 		 * the vmalloc area.
 		 */
 		if (__va(bank->start) >= VMALLOC_MIN ||
-		    __va(bank->start) < PAGE_OFFSET) {
+		    __va(bank->start) < (void *)PAGE_OFFSET) {
 			printk(KERN_NOTICE "Ignoring RAM at %.8lx-%.8lx "
 			       "(vmalloc region overlap).\n",
 			       bank->start, bank->start + bank->size - 1);
--
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