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

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Date:   Mon, 7 May 2018 09:40:43 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Steve Wise <swise@...ngridcomputing.com>
Subject: linux-next: build warning after merge of the rdma tree

Hi all,

After merging the rdma tree, today's linux-next build (powerpc
ppc64_defconfig) produced this warning:

drivers/infiniband/hw/cxgb4/restrack.c: In function 'fill_res_qp_entry':
drivers/infiniband/hw/cxgb4/restrack.c:162:6: warning: 'last_rq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (fill_swrqe(msg, rq, last_idx, last_rqe))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:180:20: note: 'last_rq_idx' was declared here
  u16 first_rq_idx, last_rq_idx;
                    ^~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:158:6: warning: 'first_rq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (fill_swrqe(msg, rq, first_idx, first_rqe))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:180:6: note: 'first_rq_idx' was declared here
  u16 first_rq_idx, last_rq_idx;
      ^~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:129:6: warning: 'last_sq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (fill_swsqe(msg, sq, last_idx, last_sqe))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:179:20: note: 'last_sq_idx' was declared here
  u16 first_sq_idx, last_sq_idx;
                    ^~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:125:6: warning: 'first_sq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (fill_swsqe(msg, sq, first_idx, first_sqe))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:179:6: note: 'first_sq_idx' was declared here
  u16 first_sq_idx, last_sq_idx;
      ^~~~~~~~~~~~

Introduced by commit

  056f9c7f39bf ("iw_cxgb4: dump detailed driver-specific QP information")

-- 
Cheers,
Stephen Rothwell

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