Hello, this is version 3 of patches adding support for LTO to U-Boot.
This series was tested by Github/Azure CI at https://github.com/u-boot/u-boot/pull/57 Code reduction is on average 4.23% for u-boot.bin and 13.58% for u-boot-spl.bin. Changes sinve v2: - now linking with --build-id=none in order to avoid link failures with some toolchains (thanks Herald Seiler) - we don't use -flto=jobserver anymore, since it causes build errors for some people. Instead we link with -flto=NPROC - removed LTO exception for arch/arm/mach-omap2/omap3/clock.o, Adam Ford says it is not needed - added some Reviewed-by tags Changes since v1: - remove patches applied into u-boot-marvell - added Reviewed-by tags - addressed some issues discovered by Bin Meng, Marek Vasut, Heinrich Schuchardt - added more ARM boards (thanks to Adam Ford, Tim Harvey and Bin Meng) - removed --gc-sections for ARM if internal libgcc is used - remove -fwhole-program in final LTO LDFLAGS - declared all 4 functions (memcpy, memset, memcmp, memmove) __used, (these are mentioned in GCC man page for option -nodefaultlibs that the compiler may generate; this seems to be a bug in GCC that linking fails with LTO even if these functions are present, because the symbols can be renamed on some targets by optimization) Marek Marek Behún (39): regmap: fix a serious pointer casting bug api: fix a potential serious bug caused by undef CONFIG_SYS_64BIT_LBA checkpatch: require quotes around section name in the __section() macro treewide: Convert macro and uses of __section(foo) to __section("foo") compiler.h: align the __ADDRESSABLE macro with Linux' version linker_lists: prepare macros to avoid code repetition test/py: improve regular expression for ut subtest symbol matcher linker_lists: declare lists and entries as __ADDRESSABLE for LTO string: make memcpy(), memset(), memcmp() and memmove() visible for LTO efi_loader: fix warning when linking with LTO efi_loader: add Sphinx doc for __efi_runtime and __efi_runtime_data efi_loader: add macro for const EFI runtime data efi_selftest: compiler flags for efi_selftest_miniapp_exception.o lib: crc32: put the crc_table variable into efi_runtime_rodata section Makefile, Makefile.spl: cosmetic change build: use thin archives instead of incremental linking build: support building with Link Time Optimizations build: link with --build-id=none sandbox: errno: avoid conflict with libc's errno sandbox: use sections instead of symbols for getopt array boundaries sandbox: make LTO available sandbox: enable LTO by default ARM: global_data: make set_gd() work for armv5 and armv6 ARM: make gd a function call for LTO and set via set_gd() ARM: fix LTO build for some thumb-interwork cases ARM: fix LTO for imx28_xea ARM: fix LTO for apf27 ARM: fix LTO for keystone ARM: kona: fix clk_bsc_enable() type mismatch for LTO ARM: imx8m: fix imx_eqos_txclk_set_rate() type mismatch for LTO ARM: fix LTO for seaboard ARM: fix LTO for rockchip and samsung ARM: omap3: fix LTO for DM3730 (and possibly other omap3 boards) armv8: SPL: discard relocation information ata: ahci: fix ahci_link_up() type mismatch for LTO ARM: make LTO available ARM: don't use -ffunction-sections/-fdata-sections with LTO build ARM: don't use --gc-sections with LTO when using private libgcc ARM: enable LTO for some boards Kbuild | 2 + Kconfig | 24 ++++++++ Makefile | 51 +++++++++++++++-- arch/Kconfig | 3 + arch/arm/config.mk | 10 +++- arch/arm/cpu/arm926ejs/Makefile | 2 + arch/arm/cpu/arm926ejs/mxs/mxs.c | 2 +- arch/arm/cpu/arm926ejs/mxs/spl_boot.c | 4 +- arch/arm/cpu/arm926ejs/spear/spl.c | 2 +- arch/arm/cpu/armv7/kona-common/clk-stubs.c | 2 +- arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c | 2 +- arch/arm/cpu/armv8/fsl-layerscape/spl.c | 2 +- arch/arm/cpu/armv8/spl_data.c | 4 +- arch/arm/cpu/armv8/u-boot-spl.lds | 1 + arch/arm/include/asm/global_data.h | 6 +- arch/arm/include/asm/secure.h | 6 +- arch/arm/include/asm/setup.h | 2 +- arch/arm/lib/Makefile | 3 + arch/arm/lib/sections.c | 31 +++++----- arch/arm/lib/spl.c | 2 +- arch/arm/mach-at91/spl.c | 2 +- arch/arm/mach-exynos/spl_boot.c | 2 +- arch/arm/mach-imx/imx8m/clock_imx8mm.c | 2 +- arch/arm/mach-imx/imx8m/soc.c | 2 +- arch/arm/mach-imx/spl_imx_romapi.c | 16 +++--- arch/arm/mach-k3/am6_init.c | 2 +- arch/arm/mach-k3/j721e_init.c | 4 +- arch/arm/mach-keystone/Makefile | 1 + arch/arm/mach-mvebu/mbus.c | 4 +- arch/arm/mach-mvebu/timer.c | 2 +- arch/arm/mach-nexell/clock.c | 6 +- arch/arm/mach-nexell/timer.c | 6 +- arch/arm/mach-omap2/omap3/Makefile | 1 + arch/arm/mach-rockchip/board.c | 2 +- arch/arm/mach-socfpga/spl_a10.c | 2 +- arch/arm/mach-sunxi/board.c | 2 +- arch/arm/mach-tegra/board.c | 2 +- arch/arm/mach-tegra/cboot.c | 8 +-- arch/arm/mach-tegra/tegra20/Makefile | 1 + arch/mips/mach-jz47xx/jz4780/jz4780.c | 2 +- arch/nds32/include/asm/setup.h | 6 +- arch/powerpc/include/asm/cache.h | 4 +- arch/riscv/cpu/cpu.c | 4 +- arch/sandbox/config.mk | 12 +++- arch/sandbox/cpu/os.c | 3 +- arch/sandbox/cpu/start.c | 3 +- arch/sandbox/cpu/u-boot-spl.lds | 8 ++- arch/sandbox/cpu/u-boot.lds | 8 ++- arch/sandbox/include/asm/getopt.h | 2 +- arch/sandbox/include/asm/sections.h | 21 ++++++- arch/sandbox/lib/sections.c | 9 +-- arch/x86/cpu/coreboot/tables.c | 2 +- arch/x86/cpu/coreboot/timestamp.c | 2 +- arch/x86/lib/sections.c | 9 +-- arch/xtensa/cpu/cpu.c | 2 +- board/bosch/shc/board.c | 2 +- board/broadcom/bcmstb/bcmstb.c | 2 +- board/samsung/arndale/arndale_spl.c | 2 +- board/samsung/common/exynos5-dt.c | 2 +- board/samsung/smdk5250/smdk5250_spl.c | 2 +- board/samsung/smdk5420/smdk5420_spl.c | 2 +- board/siemens/draco/board.c | 2 +- board/xilinx/common/fru_ops.c | 2 +- configs/am3517_evm_defconfig | 1 + configs/da850evm_defconfig | 1 + configs/da850evm_direct_nor_defconfig | 1 + configs/da850evm_nand_defconfig | 1 + configs/imx6q_logic_defconfig | 1 + configs/imx8mm_beacon_defconfig | 1 + configs/imx8mm_venice_defconfig | 1 + configs/imx8mn_beacon_2g_defconfig | 1 + configs/imx8mn_beacon_defconfig | 1 + configs/nokia_rx51_defconfig | 1 + configs/omap3_logic_defconfig | 1 + configs/r8a774a1_beacon_defconfig | 1 + configs/r8a774b1_beacon_defconfig | 1 + configs/r8a774e1_beacon_defconfig | 1 + configs/turris_mox_defconfig | 1 + configs/turris_omnia_defconfig | 1 + drivers/ata/ahci.c | 2 +- drivers/bios_emulator/biosemu.c | 4 +- drivers/core/regmap.c | 13 ++++- drivers/firmware/psci.c | 2 +- drivers/mtd/nand/raw/mxc_nand_spl.c | 2 +- drivers/pinctrl/nxp/pinctrl-imx5.c | 2 +- drivers/pinctrl/nxp/pinctrl-imx7.c | 2 +- drivers/pinctrl/nxp/pinctrl-imx8m.c | 2 +- drivers/power/pmic/pmic_tps62362.c | 2 +- drivers/power/pmic/pmic_tps65217.c | 2 +- drivers/power/pmic/pmic_tps65218.c | 2 +- drivers/power/pmic/pmic_tps65910.c | 2 +- drivers/serial/serial_pl01x.c | 4 +- include/api_public.h | 23 ++++++-- include/efi_loader.h | 54 +++++++++++++++--- include/errno.h | 8 ++- include/linker_lists.h | 66 ++++++++++++++-------- include/linux/compiler.h | 10 ++-- include/linux/compiler_attributes.h | 2 +- lib/crc32.c | 3 +- lib/efi_selftest/Makefile | 2 + lib/errno.c | 4 +- lib/string.c | 9 +-- lib/trace.c | 4 +- scripts/Makefile.build | 16 +++--- scripts/Makefile.lib | 3 + scripts/Makefile.spl | 36 ++++++++++-- scripts/checkpatch.pl | 2 +- test/py/conftest.py | 2 +- 108 files changed, 449 insertions(+), 193 deletions(-) -- 2.26.2
