Nick Desaulniers <ndesaulni...@google.com> writes: > The kernel uses `-include` to include include/linux/compiler_types.h > into all translation units (see scripts/Makefile.lib), which #includes > compiler_attributes.h. > > arch/powerpc/boot/ uses different compiler flags from the rest of the > kernel. As such, it doesn't contain the definitions from these headers, > and redefines a few that it needs. > > For the purpose of enabling -Wimplicit-fallthrough for ppc, include > compiler_types.h via `-include`. > > Link: https://github.com/ClangBuiltLinux/linux/issues/236 > Signed-off-by: Nick Desaulniers <ndesaulni...@google.com> > --- > We could just `#include "include/linux/compiler_types.h"` in the few .c > sources used from lib/ (there are proper header guards in > compiler_types.h). > > It was also noted in 6a9dc5fd6170 that we could -D__KERNEL__ and > -include compiler_types.h like the main kernel does, though testing that > produces a whole sea of warnings to cleanup. This approach is minimally > invasive. > > arch/powerpc/boot/Makefile | 1 + > arch/powerpc/boot/decompress.c | 1 - > 2 files changed, 1 insertion(+), 1 deletion(-)
Acked-by: Michael Ellerman <m...@ellerman.id.au> cheers
