| Message ID | 20220516210954.1660716-1-ndesaulniers@google.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | pass -march= only to compiler | expand |
+ Ard (I messed up my command line invocation of git send-email, sorry for more noise) https://lore.kernel.org/llvm/20220516210954.1660716-1-ndesaulniers@google.com/ On Mon, May 16, 2022 at 2:10 PM Nick Desaulniers <ndesaulniers@google.com> wrote: > > When both -march= and -Wa,-march= are specified for assembler or > assembler-with-cpp sources, GCC and Clang will prefer the -Wa,-march= > value but Clang will warn that -march= is unused. > > warning: argument unused during compilation: '-march=armv6k' > [-Wunused-command-line-argument] > > This is the top group of warnings we observe when using clang to > assemble the kernel via `ARCH=arm make LLVM=1`. > > Arnd sent a v2 of my previous patch > https://lore.kernel.org/linux-arm-kernel/20210928154143.2106903-14-arnd@kernel.org/ > I added yet a few more instances I found since then. > > Fixing this will allow us to enable > -Werror=unused-command-line-argument for clang builds. > > Nick Desaulniers (4): > ARM: remove lazy evaluation in Makefile > ARM: use .arch directives instead of assembler command line flags > ARM: only use -mtp=cp15 for the compiler > ARM: pass -march= only to compiler > > arch/arm/Makefile | 76 ++++++++++++++++------------- > arch/arm/boot/compressed/Makefile | 1 - > arch/arm/common/Makefile | 2 - > arch/arm/common/mcpm_head.S | 2 + > arch/arm/common/vlock.S | 2 + > arch/arm/kernel/Makefile | 2 - > arch/arm/kernel/hyp-stub.S | 2 + > arch/arm/kernel/swp_emulate.c | 1 + > arch/arm/lib/Makefile | 4 -- > arch/arm/lib/delay-loop.S | 4 ++ > arch/arm/mach-at91/Makefile | 3 -- > arch/arm/mach-at91/pm_suspend.S | 4 ++ > arch/arm/mach-imx/Makefile | 3 -- > arch/arm/mach-imx/headsmp.S | 2 + > arch/arm/mach-imx/resume-imx6.S | 2 + > arch/arm/mach-imx/suspend-imx6.S | 2 + > arch/arm/mach-mvebu/Makefile | 3 -- > arch/arm/mach-mvebu/coherency_ll.S | 1 + > arch/arm/mach-mvebu/pmsu.c | 1 + > arch/arm/mach-npcm/Makefile | 2 - > arch/arm/mach-npcm/headsmp.S | 2 + > arch/arm/mach-tegra/Makefile | 2 - > arch/arm/mach-tegra/reset-handler.S | 2 + > arch/arm/mach-tegra/sleep-tegra20.S | 2 + > arch/arm/mach-tegra/sleep-tegra30.S | 2 + > arch/arm/mm/Makefile | 15 ------ > arch/arm/mm/abort-ev6.S | 1 + > arch/arm/mm/abort-ev7.S | 1 + > arch/arm/mm/cache-v6.S | 2 + > arch/arm/mm/cache-v7.S | 2 + > arch/arm/mm/cache-v7m.S | 2 + > arch/arm/mm/copypage-feroceon.c | 1 + > arch/arm/mm/proc-v6.S | 2 + > arch/arm/mm/proc-v7-2level.S | 2 + > arch/arm/mm/proc-v7.S | 2 + > arch/arm/mm/tlb-v6.S | 2 + > arch/arm/mm/tlb-v7.S | 2 + > drivers/memory/Makefile | 2 - > drivers/memory/ti-emif-sram-pm.S | 1 + > drivers/soc/bcm/brcmstb/pm/Makefile | 1 - > drivers/soc/bcm/brcmstb/pm/s2-arm.S | 1 + > 41 files changed, 94 insertions(+), 74 deletions(-) > > > base-commit: 0ac824f379fba2c2b17b75fd5ada69cd68c66348 > -- > 2.36.0.550.gb090851708-goog >