linux-kernel - Re: [PATCH] struct io panic on raid1 - Re: block: unify flags for struct bio and struct request will kernel panic

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Date:	Thu, 8 Jul 2010 01:17:32 +0200
From:	Christoph Hellwig <hch@....de>
To:	Takeo Tung <kernel@...eo.idv.tw>
Cc:	Christoph Hellwig <hch@....de>, Michal Marek <mmarek@...e.cz>,
	linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk,
	sfr@...b.auug.org.au
Subject: Re: [PATCH] struct io panic on raid1 - Re: block: unify flags for struct bio and struct request will kernel panic

On Thu, Jul 08, 2010 at 07:05:39AM +0800, Takeo Tung wrote:
> Dear Christoph,
> 
> I was check the patch again. I found the panic status haapen on Soft RAID 
> 1. I review it. found some define using bool, so some like ( x & REQ_SYNC) 
> only 0 or 1.
> so if bi_rw = rw | sync will bi_rw = rw | 0 or rw | 1. not rw | ( 1 << 
> __REQ_SYNC).
> 
> So I write a patch is fix it. seems normal now. could you review the patch 
> or any comment?

The patch looks correct to me, although your mailer mangled the
whitespace badly.  If Neil wants to keep the flag as bool we could
also add a !! around the bit flag checks.

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