user_shm_lock    1387 fs/hugetlbfs/inode.c 		if (user_shm_lock(size, *user)) {
user_shm_lock    1439 include/linux/mm.h extern int user_shm_lock(size_t, struct user_struct *);
user_shm_lock    2192 mm/shmem.c     		if (!user_shm_lock(inode->i_size, user))