From: kernel test robot Subject: mm/shmem: vma_needs_copy can be static mm/memory.c:1238:1: warning: symbol 'vma_needs_copy' was not declared. Should it be static? Link: https://lkml.kernel.org/r/Ylb0CGeFJlc4EzLk@7ec4ff11d4ae Fixes: 729c63ce2bbd ("mm/shmem: handle uffd-wp during fork()") Signed-off-by: kernel test robot Reported-by: kernel test robot Acked-by: Peter Xu Signed-off-by: Andrew Morton --- mm/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memory.c~mm-shmem-handle-uffd-wp-during-fork-fix +++ a/mm/memory.c @@ -1234,7 +1234,7 @@ copy_p4d_range(struct vm_area_struct *ds * false when we can speed up fork() by allowing lazy page faults later until * when the child accesses the memory range. */ -bool +static bool vma_needs_copy(struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma) { /* _