linux-kernel - Re: [PATCH v2 2/7] dax: change bdev_dax_supported() to support boolean returns

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Message-ID: <20180529220114.GA13948@linux.intel.com>
Date:   Tue, 29 May 2018 16:01:14 -0600
From:   Ross Zwisler <ross.zwisler@...ux.intel.com>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Toshi Kani <toshi.kani@....com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Dave Jiang <dave.jiang@...el.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-xfs@...r.kernel.org
Subject: Re: [PATCH v2 2/7] dax: change bdev_dax_supported() to support
 boolean returns

On Tue, May 29, 2018 at 02:25:10PM -0700, Darrick J. Wong wrote:
> On Tue, May 29, 2018 at 01:51:01PM -0600, Ross Zwisler wrote:
> > From: Dave Jiang <dave.jiang@...el.com>
> > 
> > The function return values are confusing with the way the function is
> > named. We expect a true or false return value but it actually returns
> > 0/-errno.  This makes the code very confusing. Changing the return values
> > to return a bool where if DAX is supported then return true and no DAX
> > support returns false.
> > 
> > Signed-off-by: Dave Jiang <dave.jiang@...el.com>
> > Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
> 
> Looks ok, do you want me to pull the first two patches through the xfs
> tree?
> 
> Reviewed-by: Darrick J. Wong <darrick.wong@...cle.com>

Thanks for the review.

I'm not sure what's best.  If you do that then Mike will need to have a DM
branch for the rest of the series based on your stable commits, yea?

Mike what would you prefer?