Extern or forward variable declaration at include/linux/shmem_fs.h, line 51 References: include/linux/shmem_fs.h, line 51 mm/shmem.c, line 756 mm/shmem_acl.c, line 61 mm/shmem_acl.c, line 76 mm/shmem_acl.c, line 86 mm/shmem_acl.c, line 96 mm/shmem_acl.c, line 117 mm/shmem_acl.c, line 127 mm/shmem_acl.c, line 137 mm/shmem_acl.c, line 154