linux-kernel - Re: linux-next: build warning after merge of the rdma tree

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Message-ID: <20180726030503.GA18170@mellanox.com>
Date:   Wed, 25 Jul 2018 21:05:03 -0600
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Doug Ledford <dledford@...hat.com>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bart Van Assche <bart.vanassche@....com>,
        Chuck Lever <chuck.lever@...cle.com>
Subject: Re: linux-next: build warning after merge of the rdma tree

On Thu, Jul 26, 2018 at 10:55:53AM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the rdma tree, today's linux-next build (powerpc
> ppc64_defconfig) produced this warning:
> 
> net/sunrpc/xprtrdma/svc_rdma_rw.c: In function 'svc_rdma_post_chunk_ctxt':
> net/sunrpc/xprtrdma/svc_rdma_rw.c:350:5: warning: 'bad_wr' may be used uninitialized in this function [-Wmaybe-uninitialized]
>   if (bad_wr != first_wr)
>      ^

Huh. I'm quite surprised 0-day build service didn't warn on this.

> Introduced by commit
> 
>   ed288d74a9e5 ("net/xprtrdma: Simplify ib_post_(send|recv|srq_recv)() calls")
> 
> This is an actual problem.

Yes, for sure. Bart?

Thanks,
Jason