linux-next: build failure after merge of the vfs-brauner tree

[Mark Brown]

Hi all,

After merging the vfs-brauner tree, today's linux-next build
(arm64 kselftest) failed like this:

  CC       acct_syscall
  CC       cgroupstats
  CC       taskstats_fill_stats_tgid
  CC       breakpoint_test_arm64
  CC       step_after_suspend_test
  CC       test_cachestat
  CC       wait_inotify
  CC       test_pids
  CC       test_hugetlb_memcg
  CC       test_kill
  CC       test_cpuset
  CC       test_kmem
  CC       test_cpu
  CC       test_zswap
  CC       test_core
  CC       test_freezer
  CC       test_memcontrol
  CC       clone3_clear_sighand
  CC       clone3
  CC       clone3_set_tid
  CC       clone3_cap_checkpoint_restore
  CC       proc_filter
  CC       unshare_test
  CC       close_range_test
  CC       coredump_notify_signal_helper
  CC       coredump_socket_test
coredump_socket_test.c: In function 'coredump_socket_coredump_thread':
coredump_socket_test.c:677:35: error: implicit declaration
of function 'get_peer_pidfd_thread'; did you mean
'get_peer_pidfd'? [-Wimplicit-function-declaration]
  677 |                 fd_thread_pidfd = get_peer_pidfd_thread(fd_coredump);
      |                                   ^~~~~~~~~~~~~~~~~~~~~
      |                                   get_peer_pidfd
coredump_socket_test.c:752:17: error: implicit declaration
of function 'crashing_child_thread'; did you mean
'crashing_child_memory'? [-Wimplicit-function-declaration]
  752 |                 crashing_child_thread();
      |                 ^~~~~~~~~~~~~~~~~~~~~ crashing_child_memory

Caused by commit

   b956027e73bee (selftests/coredump: check the dumping thread's pidfd)

I have used the tree from next-20260914 instead.

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