It's bad to extern swap_info[] in .c. Include corresponding header file instead. Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> --- mm/shmem.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index ccef5fad0049..b9cebf074367 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -38,6 +38,7 @@ #include <linux/hugetlb.h> #include <linux/frontswap.h> #include <linux/fs_parser.h> +#include <linux/swapfile.h> static struct vfsmount *shm_mnt; @@ -1152,8 +1153,6 @@ static void shmem_evict_inode(struct inode *inode) clear_inode(inode); } -extern struct swap_info_struct *swap_info[]; - static int shmem_find_swap_entries(struct address_space *mapping, pgoff_t start, unsigned int nr_entries, struct page **entries, pgoff_t *indices, -- 2.23.0
