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

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Date:   Fri, 15 Jul 2022 13:52:32 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Dylan Yudaken <dylany@...com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build warning after merge of the block tree

Hi all,

After merging the block tree, today's linux-next build (arm
multi_v7_defconfig) produced this warning:

In file included from include/linux/slab.h:16,
                 from io_uring/net.c:5:
io_uring/net.c: In function 'io_recvmsg_multishot_overflow':
include/linux/overflow.h:67:22: warning: comparison of distinct pointer types lacks a cast
   67 |         (void) (&__a == &__b);                  \
      |                      ^~
io_uring/net.c:332:13: note: in expansion of macro 'check_add_overflow'
  332 |         if (check_add_overflow(sizeof(struct io_uring_recvmsg_out),
      |             ^~~~~~~~~~~~~~~~~~
include/linux/overflow.h:68:22: warning: comparison of distinct pointer types lacks a cast
   68 |         (void) (&__a == __d);                   \
      |                      ^~
io_uring/net.c:332:13: note: in expansion of macro 'check_add_overflow'
  332 |         if (check_add_overflow(sizeof(struct io_uring_recvmsg_out),
      |             ^~~~~~~~~~~~~~~~~~
include/linux/overflow.h:67:22: warning: comparison of distinct pointer types lacks a cast
   67 |         (void) (&__a == &__b);                  \
      |                      ^~
io_uring/net.c:335:13: note: in expansion of macro 'check_add_overflow'
  335 |         if (check_add_overflow(hdr, iomsg->controllen, &hdr))
      |             ^~~~~~~~~~~~~~~~~~

Introduced by commit

  a8b38c4ce724 ("io_uring: support multishot in recvmsg")

-- 
Cheers,
Stephen Rothwell

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