move_pages
ret = move_pages(ctx, uffdio_move.dst, uffdio_move.src,
ssize_t move_pages(struct userfaultfd_ctx *ctx, unsigned long dst_start,
COND_SYSCALL(move_pages);
SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages,
KVM_SYSCALL_DEFINE(move_pages, 6, int, pid, unsigned long, count, void *, pages,
ret = move_pages(0, 1, (void **) &ptr, &n2, &status,
ret = move_pages(0, 1, (void **)®ion, NULL, &status, MPOL_MF_MOVE_ALL);
ret = move_pages(0, 1, (void **)®ion, &node, &status, MPOL_MF_MOVE_ALL);