linux-kernel - Re: Issue in using mmap on ARM target

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Message-ID: <19603.51810.601209.98683@pilspetsen.it.uu.se>
Date:	Fri, 17 Sep 2010 22:06:58 +0200
From:	Mikael Pettersson <mikpe@...uu.se>
To:	naveen yadav <yad.naveen@...il.com>
Cc:	Christoph Lameter <cl@...ux.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	robm@...tmail.fm, linux-kernel@...r.kernel.org,
	Bron Gondwana <brong@...tmail.fm>,
	linux-mm <linux-mm@...ck.org>, Mel Gorman <mel@....ul.ie>
Subject: Re: Issue in using mmap on ARM target

naveen yadav writes:
 > Hi all,
 > 
 > I am facing one issue when executing below progmra on ARM target. The
 > same program work well on X86 host machine,
 > 
 > When execute on Host(x86). the result are as expected.
 > [root@...alhost naveen]# ./a.out  0000 b 2
 > /dev/mem opened.
 > Memory mapped at address 0xb7f00000.
 > Value at address 0x0 (0xb7f00000): 0x24
 > Written 0x2; readback 0x2
 > 
 > But when execute on Target:
 > # ./a.out 0 w 20
 > /dev/mem opened.
 > Memory mapped at address 0x40003000.
 > Value at address 0x0 (0x40003000): 0xEA000006
 > Written 0x14; readback 0xEA000006
 > #
 > The value does not change. any idea ....

You might have better luck getting an informed answer by posting
to linux-arm-kernel@...ts.infradead.org instead.
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