| Message ID | 20171016132440.38098-1-mark.rutland@arm.com |
|---|---|
| Headers | show |
| Series | Cleanup instrumentation avoidance | expand |
Sorry Marc, I somehow typo'd your name when sending this out... Mark. On Mon, Oct 16, 2017 at 02:24:36PM +0100, Mark Rutland wrote: > 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 >