1465     int uffd_fd;  in ram_write_tracking_compatible()  local
1470     uffd_fd = uffd_create_fd(UFFD_FEATURE_PAGEFAULT_FLAG_WP, false);  in ram_write_tracking_compatible()
1471     if (uffd_fd < 0) {  in ram_write_tracking_compatible()
1485         if (uffd_register_memory(uffd_fd, block->host, block->max_length,  in ram_write_tracking_compatible()
1496     uffd_close_fd(uffd_fd);  in ram_write_tracking_compatible()
1600     int uffd_fd = (uintptr_t)opaque;  in uffd_protect_section()  local
1602     return uffd_change_protection(uffd_fd, rb->host + offset, size, true,  in uffd_protect_section()
1606 static int ram_block_uffd_protect(RAMBlock *rb, int uffd_fd)  in ram_block_uffd_protect()  argument
1621                                                     (void *)(uintptr_t)uffd_fd);  in ram_block_uffd_protect()
1623     return uffd_change_protection(uffd_fd, rb->host,  in ram_block_uffd_protect()
1634     int uffd_fd;  in ram_write_tracking_start()  local
1639     uffd_fd = uffd_create_fd(UFFD_FEATURE_PAGEFAULT_FLAG_WP, true);  in ram_write_tracking_start()
1640     if (uffd_fd < 0) {  in ram_write_tracking_start()
1641         return uffd_fd;  in ram_write_tracking_start()
1643     rs->uffdio_fd = uffd_fd;  in ram_write_tracking_start()
1662         if (ram_block_uffd_protect(block, uffd_fd)) {  in ram_write_tracking_start()
1685     uffd_close_fd(uffd_fd);  in ram_write_tracking_start()