linux-kernel - Re: linux-next: next-20090609 hangs in early user mode

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Message-Id: <20090610184455.c06375d2.sfr@canb.auug.org.au>
Date:	Wed, 10 Jun 2009 18:44:55 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-next@...r.kernel.org,
	"Theodore Ts'o" <tytso@....edu>, Al Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org
Subject: Re: linux-next: next-20090609 hangs in early user mode

Hi Christoph,

On Wed, 10 Jun 2009 04:31:39 -0400 Christoph Hellwig <hch@...radead.org> wrote:
>
> On Wed, Jun 10, 2009 at 06:00:58PM +1000, Stephen Rothwell wrote:
> > The machines are PowerPC64 (so big endian).  It looks to me like we use
> > bitops on i_state - don't our bitops only apply to unsigned longs?
> 
> Yes, bitops need unsigned long.  And on most plaforms should give you
> warnings when using them on the wrong type.

In this case the "word" is being passed through wait_on_bit which takes a
"void *", so we lose the type information.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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