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

From: Jason Gunthorpe <[email-masked]>
Date: Wed, 25 Jul 2018 21:05:03 -0600

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