shmem_lock        703 include/linux/mm.h int shmem_lock(struct file *file, int lock, struct user_struct *user);
shmem_lock        175 ipc/shm.c      		shmem_lock(shp->shm_file, 0, shp->mlock_user);
shmem_lock        767 ipc/shm.c      				err = shmem_lock(shp->shm_file, 1, user);
shmem_lock        774 ipc/shm.c      			shmem_lock(shp->shm_file, 0, shp->mlock_user);