linux-kernel - Re: [PATCH] rdma: siw: remove unused variable

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Message-ID: <b5775622b2e8360e77f90dddfff9aa84af48240e.camel@redhat.com>
Date:   Mon, 29 Jul 2019 15:45:48 -0400
From:   Doug Ledford <dledford@...hat.com>
To:     Jason Gunthorpe <jgg@...pe.ca>, John Hubbard <jhubbard@...dia.com>
Cc:     Anders Roxell <anders.roxell@...aro.org>, bmt@...ich.ibm.com,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rdma: siw: remove unused variable

On Mon, 2019-07-29 at 16:03 -0300, Jason Gunthorpe wrote:
> On Mon, Jul 29, 2019 at 02:19:35PM -0400, Doug Ledford wrote:
> > On Fri, 2019-07-26 at 11:25 +0200, Anders Roxell wrote:
> > > The variable 'p' si no longer used and the compiler rightly
> > > complains
> > > that it should be removed.
> > > 
> > > ../drivers/infiniband/sw/siw/siw_mem.c: In function
> > > ‘siw_free_plist’:
> > > ../drivers/infiniband/sw/siw/siw_mem.c:66:16: warning: unused
> > > variable
> > >  ‘p’ [-Wunused-variable]
> > >   struct page **p = chunk->plist;
> > >                 ^
> > > 
> > > Rework to remove unused variable.
> > > 
> > > Fixes: 8288d030447f ("mm/gup: add make_dirty arg to
> > > put_user_pages_dirty_lock()")
> > 
> > This commit hash and the commit subject does not exist in Linus'
> > tree as
> > of today.  What tree is this being merged through, and is it slated
> > to
> > merge soon or is this a for-next item?
> 
> This is though -mm, maybe John knows what is what

Hmmm...if it's through -mm, doesn't that mean that we can't rely on the
hash because the next time Andrew's tree rebases (using quilt or
whatever it is he does) that the hash will change?  It doesn't really
matter too much...we can't take the fix anyway, it should probably be
squashed into the patch that it's fixing, and if you follow Bernard's
advice, you fix the problem by eliminating this function and changing
the sole call site to just call put_user_pages_dirty_lock() directly.

-- 
Doug Ledford <dledford@...hat.com>
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