Re: [dm-devel] [PATCH 1/2 block#for-2.6.36] bio, fs: update RWA_MASK, READA and SWRITE to match the corresponding BIO_RW_* bits

[Jens Axboe <axboe kernel dk>]

On 2010-08-03 11:53, Tejun Heo wrote:
> Commit a82afdf (block: use the same failfast bits for bio and request)
> moved BIO_RW_* bits around such that they match up with REQ_* bits.
> Unfortunately, fs.h hard coded RW_MASK, RWA_MASK, READ, WRITE, READA
> and SWRITE as 0, 1, 2 and 3, and expected them to match with BIO_RW_*
> bits.  READ/WRITE didn't change but BIO_RW_AHEAD was moved to bit 4
> instead of bit 1, breaking RWA_MASK, READA and SWRITE.
> 
> This patch updates RWA_MASK, READA and SWRITE such that they match the
> BIO_RW_* bits again.  A follow up patch will update the definitions to
> directly use BIO_RW_* bits so that this kind of breakage won't happen
> again.
> 
> Neil also spotted missing RWA_MASK conversion.
> 
> Stable: The offending commit a82afdf was released with v2.6.32, so
> this patch should be applied to all kernels since then but it must
> _NOT_ be applied to kernels earlier than that.
> 
> Signed-off-by: Tejun Heo <tj kernel org>
> Reported-and-bisected-by: Vladislav Bolkhovitin <vst vlnb net>
> Root-caused-by: Neil Brown <neilb suse de>
> Cc: Jens Axobe <axboe kernel dk>
           ^^^^^

(Too) common typo :-)

Anyway, applied to for-2.6.36, thanks a lot.

-- 
Jens Axboe