[linux-next:master 3834/3955] mm/memory.c:1238:1: sparse: sparse: symbol 'vma_needs_copy' was not declared. Should it be static?

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   c97e430ab5539993ab2afc6e80deea80aef9d799
commit: 729c63ce2bbd5813b8061e50cc38187aed05114c [3834/3955] mm/shmem: handle uffd-wp during fork()
config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20220414/202204140043.Tx7BIBvI-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.2.0-19) 11.2.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=729c63ce2bbd5813b8061e50cc38187aed05114c
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 729c63ce2bbd5813b8061e50cc38187aed05114c
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)
>> mm/memory.c:1238:1: sparse: sparse: symbol 'vma_needs_copy' was not declared. Should it be static?
   mm/memory.c:1031:17: sparse: sparse: context imbalance in 'copy_pte_range' - different lock contexts for basic block
   mm/memory.c:1827:16: sparse: sparse: context imbalance in '__get_locked_pte' - different lock contexts for basic block
   mm/memory.c:1875:9: sparse: sparse: context imbalance in 'insert_page' - different lock contexts for basic block
   mm/memory.c:2377:17: sparse: sparse: context imbalance in 'remap_pte_range' - different lock contexts for basic block
   mm/memory.c:2633:17: sparse: sparse: context imbalance in 'apply_to_pte_range' - unexpected unlock
   mm/memory.c:2922:9: sparse: sparse: context imbalance in 'wp_page_copy' - different lock contexts for basic block
   mm/memory.c:3274:17: sparse: sparse: context imbalance in 'wp_pfn_shared' - unexpected unlock
   mm/memory.c:3341:19: sparse: sparse: context imbalance in 'do_wp_page' - different lock contexts for basic block
   mm/memory.c:5211:5: sparse: sparse: context imbalance in 'follow_invalidate_pte' - wrong count at exit
   mm/memory.c:5332:23: sparse: sparse: context imbalance in 'follow_pfn' - unexpected unlock
   mm/memory.c:5362:9: sparse: sparse: context imbalance in 'follow_phys' - unexpected unlock
   mm/memory.c:5396:9: sparse: sparse: context imbalance in 'generic_access_phys' - unexpected unlock

Please review and possibly fold the followup patch.

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