linux-kernel - Re: [PATCH] Fix blktrace setup 32-bit ioctl on 64-bit kernels

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Message-Id: <20071002.005217.133194599.davem@davemloft.net>
Date:	Tue, 02 Oct 2007 00:52:17 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jens.axboe@...cle.com
Cc:	linux-kernel@...r.kernel.org, abhishekrai@...gle.com,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH] Fix blktrace setup 32-bit ioctl on 64-bit kernels

From: Jens Axboe <jens.axboe@...cle.com>
Date: Tue, 2 Oct 2007 09:39:43 +0200

> Hi,
> 
> The layout of struct blk_user_trace_setup is a bit unfortunate, it gets
> padded differently on 32-bit and 64-bit archs. So right now it's not
> possible to trace 64-bit kernels with a 32-bit app. This patch fixes
> that up by adding a compat ioctl handler for BLKTRACESETUP.
> 
> Signed-off-by: Jens Axboe <jens.axboe@...cle.com>

Acked-by: David S. Miller <davem@...emloft.net>
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