linux-next: build failure after merge of the akpm-current tree

Stephen Rothwell
2021-03-10T03:16:55Z

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Hi all,

After merging the akpm-current tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

mm/shmem.c:2365:12: warning: 'enum mcopy_atomic_mode' declared inside parameter list will not be visible outside of this definition or declaration
2365 | enum mcopy_atomic_mode mode, struct page **pagep)
| ^~~~~~~~~~~~~~~~~
mm/shmem.c:2365:30: error: parameter 6 ('mode') has incomplete type
2365 | enum mcopy_atomic_mode mode, struct page **pagep)
| ~~~~~~~~~~~~~~~~~~~~~~~^~~~
mm/shmem.c:2362:5: error: function declaration isn't a prototype [-Werror=strict-prototypes]
2362 | int shmem_mcopy_atomic_pte(struct mm_struct *dst_mm, pmd_t *dst_pmd,
| ^~~~~~~~~~~~~~~~~~~~~~
mm/shmem.c: In function 'shmem_mcopy_atomic_pte':
mm/shmem.c:2367:30: error: 'MCOPY_ATOMIC_CONTINUE' undeclared (first use in this function)
2367 | bool is_continue = (mode == MCOPY_ATOMIC_CONTINUE);
| ^~~~~~~~~~~~~~~~~~~~~
mm/shmem.c:2367:30: note: each undeclared identifier is reported only once for each function it appears in
mm/shmem.c:2394:15: error: 'MCOPY_ATOMIC_NORMAL' undeclared (first use in this function)
2394 | if (mode == MCOPY_ATOMIC_NORMAL) { /* mcopy_atomic */
| ^~~~~~~~~~~~~~~~~~~

Caused by commit

3407bec05d6d ("userfaultfd: support minor fault handling for shmem")

# CONFIG_USERFAULTFD is not set

I have reverted that commit (and the following 4 as well).
--
Cheers,
Stephen Rothwell

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