From f8113f311cf8be566d809598e967bf5ceb35b567 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 9 Sep 2026 18:39:18 +0200 Subject: [PATCH] ACPI: bus: Reduce runtime memory footprint of struct acpi_device The ACPI handle is heavily used by the ACPI code. Making it as the first member in the struct acpi_device reduces code size. For instance, the drivers/acpi/scan.o (with `make allyesconfig`) gives this statistics: add/remove: 0/0 grow/shrink: 3/8 up/down: 50/-169 (-119) Function old new delta acpi_device_add 2294 2319 +25 acpi_add_single_object 6523 6544 +21 acpi_dev_get_next_consumer_dev 602 606 +4 acpi_tie_acpi_dev 169 165 -4 acpi_scan_drop_device 319 315 -4 acpi_dev_clear_dependencies 1151 1147 -4 acpi_bus_attach 2898 2894 -4 acpi_dma_get_range 1420 1415 -5 acpi_init_device_object 5497 5485 -12 acpi_bus_check_add 1940 1923 -17 acpi_device_hotplug 3407 3288 -119 Total: Before=77509, After=77390, chg -0.15% Signed-off-by: Andy Shevchenko [ rjw: Changelog tweaks ] Link: https://patch.msgid.link/20260909163918.368017-1-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki --- include/acpi/acpi_bus.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index a10a591c18b2..64ae66ca456e 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -435,9 +435,9 @@ struct acpi_device_software_nodes { /* Device */ struct acpi_device { + acpi_handle handle; /* no handle for fixed hardware */ u32 pld_crc; int device_type; - acpi_handle handle; /* no handle for fixed hardware */ struct fwnode_handle fwnode; struct list_head wakeup_list; struct list_head del_list;