On Thu, Jul 16, 2026 at 02:03:22PM -0300, Jason Gunthorpe wrote: > The tools/include readl/writel MMIO accessors on arm64 use > inner-shareable barriers (dmb ish) while the kernel uses > outer-shareable (dmb osh). Fix them to match. > > Add __io_bw() and __io_ar() definitions matching the kernel's > arch/arm64/include/asm/io.h, including the dummy control dependency > in __io_ar() that orders MMIO reads against all subsequent > instructions. > > Assisted-by: Claude:claude-opus-4.6 > Signed-off-by: Jason Gunthorpe <[email protected]> ... > diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk > index f02cc8a2e4ae32..fdd22df9174b88 100644 > --- a/tools/testing/selftests/lib.mk > +++ b/tools/testing/selftests/lib.mk > @@ -5,9 +5,14 @@ ifneq ($(filter %/,$(LLVM)),) > LLVM_PREFIX := $(LLVM) > else ifneq ($(filter -%,$(LLVM)),) > LLVM_SUFFIX := $(LLVM) > +else ifneq ($(LLVM),1) > +$(error Invalid value for LLVM, see Documentation/kbuild/llvm.rst) > endif > > CLANG := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) > +LD := $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) > +# Selftests link through $(CC), so point clang at the LLVM linker. > +LDFLAGS += --ld-path=$(LD) > > CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi > CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu
Was this hunk intended to be included in this change? It is not mentioned anywhere. I assume this is the only reason that the LLVM folks were CC'd on this series. -- Cheers, Nathan
