Recently we spotted that some code with special ABI requirements was being instrumented by KCOV [1], and we need to avoid all instrumentation in this case. While it's possible to disable each instrumentation option manually, this is tedious and error prone as new options are introduced. This series adds a new CC_INSTRUMENT option which can be used to disable all instrumentation of a given file or directory, and makes use of this throught arm64. There are other places where this could be used (e.g. the EFI stub), but I've avoided altering those for now in the hope that this can be taken via the arm64 tree. Thanks, Mark. [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2017-September/533105.html Mark Rutland (4): kbuild: allow global override of CC instrumentation arm64: prevent instrumentation of LL/SC atomics kvm/arm64: simplify CC instrumentation opt-out arm64: vdso: remove pointless gcov option arch/arm64/kernel/vdso/Makefile | 3 --- arch/arm64/kvm/hyp/Makefile | 5 +---- arch/arm64/lib/Makefile | 1 + scripts/Makefile.lib | 17 +++++++++++++---- 4 files changed, 15 insertions(+), 11 deletions(-) -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
