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Message-ID: <20240305152634.014058aa@canb.auug.org.au>
Date: Tue, 5 Mar 2024 15:26:34 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Qi Zheng <zhengqi.arch@...edance.com>, Linux Kernel Mailing List
 <linux-kernel@...r.kernel.org>, Linux Next Mailing List
 <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the mm tree

Hi all,

After merging the mm tree, today's linux-next build (s390 defconfig)
failed like this:

In file included from include/linux/smp.h:12,
                 from include/linux/lockdep.h:14,
                 from include/linux/spinlock.h:63,
                 from include/linux/mmzone.h:8,
                 from include/linux/gfp.h:7,
                 from include/linux/mm.h:7,
                 from include/linux/pagewalk.h:5,
                 from arch/s390/mm/gmap.c:12:
arch/s390/mm/gmap.c: In function 'gmap_free':
include/linux/list.h:866:19: error: assignment to 'struct page *' from incompatible pointer type 'struct ptdesc *' [-Werror=incompatible-pointer-types]
  866 |                 n = list_next_entry(pos, member);                       \
      |                   ^
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:868:18: error: assignment to 'struct ptdesc *' from incompatible pointer type 'struct page *' [-Werror=incompatible-pointer-types]
  868 |              pos = n, n = list_next_entry(n, member))
      |                  ^
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/kernel.h:22,
                 from arch/s390/mm/gmap.c:11:
arch/s390/mm/gmap.c:212:72: error: 'struct page' has no member named 'pt_list'; did you mean 'pcp_list'?
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                                                                        ^~~~~~~
include/linux/container_of.h:19:33: note: in definition of macro 'container_of'
   19 |         void *__mptr = (void *)(ptr);                                   \
      |                                 ^~~
include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
  645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
      |         ^~~~~~~~~~
include/linux/list.h:868:27: note: in expansion of macro 'list_next_entry'
  868 |              pos = n, n = list_next_entry(n, member))
      |                           ^~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/container_of.h:5:
arch/s390/mm/gmap.c:212:72: error: 'struct page' has no member named 'pt_list'; did you mean 'pcp_list'?
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                                                                        ^~~~~~~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
   78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
      |                                                        ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
   20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
      |         ^~~~~~~~~~~~~
include/linux/container_of.h:20:23: note: in expansion of macro '__same_type'
   20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
      |                       ^~~~~~~~~~~
include/linux/list.h:601:9: note: in expansion of macro 'container_of'
  601 |         container_of(ptr, type, member)
      |         ^~~~~~~~~~~~
include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
  645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
      |         ^~~~~~~~~~
include/linux/list.h:868:27: note: in expansion of macro 'list_next_entry'
  868 |              pos = n, n = list_next_entry(n, member))
      |                           ^~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:72: error: 'struct page' has no member named 'pt_list'; did you mean 'pcp_list'?
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                                                                        ^~~~~~~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
   78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
      |                                                        ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
   20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
      |         ^~~~~~~~~~~~~
include/linux/container_of.h:20:23: note: in expansion of macro '__same_type'
   20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
      |                       ^~~~~~~~~~~
include/linux/list.h:601:9: note: in expansion of macro 'container_of'
  601 |         container_of(ptr, type, member)
      |         ^~~~~~~~~~~~
include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
  645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
      |         ^~~~~~~~~~
include/linux/list.h:868:27: note: in expansion of macro 'list_next_entry'
  868 |              pos = n, n = list_next_entry(n, member))
      |                           ^~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:72: error: 'struct page' has no member named 'pt_list'; did you mean 'pcp_list'?
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                                                                        ^~~~~~~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
   78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
      |                                                        ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
   20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
      |         ^~~~~~~~~~~~~
include/linux/container_of.h:21:23: note: in expansion of macro '__same_type'
   21 |                       __same_type(*(ptr), void),                        \
      |                       ^~~~~~~~~~~
include/linux/list.h:601:9: note: in expansion of macro 'container_of'
  601 |         container_of(ptr, type, member)
      |         ^~~~~~~~~~~~
include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
  645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
      |         ^~~~~~~~~~
include/linux/list.h:868:27: note: in expansion of macro 'list_next_entry'
  868 |              pos = n, n = list_next_entry(n, member))
      |                           ^~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:390:27: error: expression in static assertion is not an integer
  390 | #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
      |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
   78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
      |                                                        ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
   20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
      |         ^~~~~~~~~~~~~
include/linux/container_of.h:20:23: note: in expansion of macro '__same_type'
   20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
      |                       ^~~~~~~~~~~
include/linux/list.h:601:9: note: in expansion of macro 'container_of'
  601 |         container_of(ptr, type, member)
      |         ^~~~~~~~~~~~
include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
  645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
      |         ^~~~~~~~~~
include/linux/list.h:868:27: note: in expansion of macro 'list_next_entry'
  868 |              pos = n, n = list_next_entry(n, member))
      |                           ^~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/uapi/linux/posix_types.h:5,
                 from include/uapi/linux/types.h:14,
                 from include/linux/types.h:6,
                 from include/linux/kasan-checks.h:5,
                 from include/asm-generic/rwonce.h:26,
                 from arch/s390/include/asm/rwonce.h:29,
                 from include/linux/compiler.h:299,
                 from include/linux/array_size.h:5,
                 from include/linux/kernel.h:16:
arch/s390/mm/gmap.c:212:72: error: 'struct page' has no member named 'pt_list'; did you mean 'pcp_list'?
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                                                                        ^~~~~~~
include/linux/stddef.h:16:58: note: in definition of macro 'offsetof'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                                          ^~~~~~
include/linux/list.h:601:9: note: in expansion of macro 'container_of'
  601 |         container_of(ptr, type, member)
      |         ^~~~~~~~~~~~
include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
  645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
      |         ^~~~~~~~~~
include/linux/list.h:868:27: note: in expansion of macro 'list_next_entry'
  868 |              pos = n, n = list_next_entry(n, member))
      |                           ^~~~~~~~~~~~~~~
arch/s390/mm/gmap.c:212:17: note: in expansion of macro 'list_for_each_entry_safe'
  212 |                 list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

Caused by commit

  859584c3ddba ("s390: supplement for ptdesc conversion")

from the mm-unstable branch of the mm tree.

I have reverted that commit for today.
-- 
Cheers,
Stephen Rothwell

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