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authorNick Desaulniers <ndesaulniers@google.com>2020-11-15 20:35:30 -0800
committerGustavo A. R. Silva <gustavoars@kernel.org>2020-11-18 14:02:13 -0600
commit77433830ed164a0bc38dd43877bab3f7f7fd7fa3 (patch)
tree97e5197e4316cd4abc5830ed1b29efe84a4505bd
parent09162bc32c880a791c6c0668ce0745cf7958f576 (diff)
downloadlinux-77433830ed164a0bc38dd43877bab3f7f7fd7fa3.tar.gz
powerpc: boot: include compiler_attributes.h
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_attributes.h via `-include`.

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. And it also helps to entice a cleanup.

Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://github.com/ClangBuiltLinux/linux/issues/236
[ Gustavo: Massage a bit as per Miguel's suggestion. ]
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
-rw-r--r--arch/powerpc/boot/Makefile1
-rw-r--r--arch/powerpc/boot/decompress.c1
2 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index f8ce6d2dde7b..1659963a8f1d 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -31,6 +31,7 @@ endif
 BOOTCFLAGS    := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 		 -fno-strict-aliasing -O2 -msoft-float -mno-altivec -mno-vsx \
 		 -pipe -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \
+		 -include $(srctree)/include/linux/compiler_attributes.h \
 		 $(LINUXINCLUDE)
 
 ifdef CONFIG_PPC64_BOOT_WRAPPER
diff --git a/arch/powerpc/boot/decompress.c b/arch/powerpc/boot/decompress.c
index 8bf39ef7d2df..6098b879ac97 100644
--- a/arch/powerpc/boot/decompress.c
+++ b/arch/powerpc/boot/decompress.c
@@ -21,7 +21,6 @@
 
 #define STATIC static
 #define INIT
-#define __always_inline inline
 
 /*
  * The build process will copy the required zlib source files and headers