As discussed at [1] and [2], this series removes '-mno-global-merge' from KBUILD_CFLAGS for clang, as it causes warnings for UML, and it no longer appears to be necessary, as I do not see any modpost warnings with LLVM 11 through 15 with several different ARCH=arm and ARCH=arm64 configurations. [1] is currently in the UML tree, destined for 5.18, but it is buggy, as I note in [2]. This series is an alternative to [2], which has not been picked up yet, so it is based on the current UML tree. If [2] is picked up, I can rework the first patch to remove the '-mno-global-merge' filtering from arch/um/Makefile; otherwise, this should be picked up in place of [2]. I intentionally kept the first patch vague around what fixed the modpost warnings, as I am not too sure. [3] seems somewhat likely, but I don't think that will revert cleanly on main to test. I think the testing is enough to show that the original issue is resolved but I do note that we can add this flag back in the architecture specific Makefiles if needed. Please review and ack as necessary. [1]: https://lore.kernel.org/r/20220303090643.241747-1-davidgow@xxxxxxxxxx/ [2]: https://lore.kernel.org/r/20220322173547.677760-1-nathan@xxxxxxxxxx/ [3]: https://github.com/llvm/llvm-project/commit/863bfdbfb446adaef767ff514d1f2ffb5d489562 Nathan Chancellor (2): kbuild: Remove '-mno-global-merge' Revert "um: clang: Strip out -mno-global-merge from USER_CFLAGS" Makefile | 4 ---- arch/um/Makefile | 4 ---- 2 files changed, 8 deletions(-) base-commit: 82017457957a550d7d00dde419435dd74a890887 -- 2.35.1
