Hi all,

After merging the userns tree, today's linux-next build (x86_64
allmodconfig) failed like this:

In file included from include/linux/kernel.h:19,
                 from mm/debug.c:9:
mm/debug.c: In function 'dump_mm':
mm/debug.c:251:28: error: 'const struct mm_struct' has no member named 'core_state'
  251 |   mm->binfmt, mm->flags, mm->core_state,
      |                            ^~
include/linux/printk.h:418:19: note: in definition of macro 'printk_index_wrap'
  418 |   _p_func(_fmt, ##__VA_ARGS__);    \
      |                   ^~~~~~~~~~~
include/linux/printk.h:459:2: note: in expansion of macro 'printk'
  459 |  printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
      |  ^~~~~~
mm/debug.c:208:2: note: in expansion of macro 'pr_emerg'
  208 |  pr_emerg("mm %px mmap %px seqnum %llu task_size %lu\n"
      |  ^~~~~~~~

Caused by commit

  483f2bb374b7 ("coredump: Limit coredumps to a single thread group")

I have used the userns tree from next-20211006 for today.

-- 
Cheers,
Stephen Rothwell