Re: [PATCH 2/2] compiler.h: Include asm/rwonce.h under ARM64 and ALPHA to fix build errors
On 01/14/2021 01:14 AM, Yonghong Song wrote: I do not think this fix is correct. x86 does not define its own rwonce.h and still compiles fine. As noted in the above, we have include/asm-generic/rwonce.h. Once you do a proper build, you will have rwonce.h in arch generated directory like -bash-4.4$ find . -name rwonce.h ./include/asm-generic/rwonce.h ./arch/alpha/include/asm/rwonce.h ./arch/arm64/include/asm/rwonce.h ./arch/x86/include/generated/asm/rwonce.h for mips, it should generated in arch/mips/include/generated/asm/rwonce.h. Please double check why this does not happen. Hi Yonghong, Thank you very much for your reply. You are right, this patch is meaningless. I find this build error when make M=samples/bpf after make clean, so the ./arch/mips/include/generated/asm/rwonce.h is not exist. After rebuild the kernel, this header file can be found when make M=samples/bpf due to samples/bpf/Makefile contains $LINUXINCLUDE. $ find . -name rwonce.h ./include/asm-generic/rwonce.h ./arch/arm64/include/asm/rwonce.h ./arch/mips/include/generated/asm/rwonce.h ./arch/alpha/include/asm/rwonce.h $ cat ./arch/mips/include/generated/asm/rwonce.h #include Hi Sergei and kernel test robot, Thank you for your suggestion and report, please ignore this patch, sorry for the noise. Thanks, Tiezhu
Re: [PATCH 2/2] compiler.h: Include asm/rwonce.h under ARM64 and ALPHA to fix build errors
Hello! On 13.01.2021 13:57, Tiezhu Yang wrote: When make M=samples/bpf on the Loongson 3A3000 platform which belongs to MIPS arch, there exists many similar build errors about 'asm/rwonce.h' file not found, so include it only under CONFIG_ARM64 and CONFIG_ALPHA due to it exists only in arm64 and alpha arch. CLANG-bpf samples/bpf/xdpsock_kern.o In file included from samples/bpf/xdpsock_kern.c:2: In file included from ./include/linux/bpf.h:9: In file included from ./include/linux/workqueue.h:9: In file included from ./include/linux/timer.h:5: In file included from ./include/linux/list.h:9: In file included from ./include/linux/kernel.h:10: ./include/linux/compiler.h:246:10: fatal error: 'asm/rwonce.h' file not found ^~ 1 error generated. $ find . -name rwonce.h ./include/asm-generic/rwonce.h ./arch/arm64/include/asm/rwonce.h ./arch/alpha/include/asm/rwonce.h Signed-off-by: Tiezhu Yang --- include/linux/compiler.h | 6 ++ 1 file changed, 6 insertions(+) diff --git a/include/linux/compiler.h b/include/linux/compiler.h index b8fe0c2..bdbe759 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -243,6 +243,12 @@ static inline void *offset_to_ptr(const int *off) */ #define prevent_tail_call_optimization() mb() +#ifdef CONFIG_ARM64 Why not #if defined(CONFIG_ALPHA) || defined(CONFIG_ARM64)? #include +#endif + +#ifdef CONFIG_ALPHA +#include +#endif #endif /* __LINUX_COMPILER_H */ MBR, Sergei
Re: [PATCH 2/2] compiler.h: Include asm/rwonce.h under ARM64 and ALPHA to fix build errors
On 1/13/21 2:57 AM, Tiezhu Yang wrote: When make M=samples/bpf on the Loongson 3A3000 platform which belongs to MIPS arch, there exists many similar build errors about 'asm/rwonce.h' file not found, so include it only under CONFIG_ARM64 and CONFIG_ALPHA due to it exists only in arm64 and alpha arch. CLANG-bpf samples/bpf/xdpsock_kern.o In file included from samples/bpf/xdpsock_kern.c:2: In file included from ./include/linux/bpf.h:9: In file included from ./include/linux/workqueue.h:9: In file included from ./include/linux/timer.h:5: In file included from ./include/linux/list.h:9: In file included from ./include/linux/kernel.h:10: ./include/linux/compiler.h:246:10: fatal error: 'asm/rwonce.h' file not found ^~ 1 error generated. $ find . -name rwonce.h ./include/asm-generic/rwonce.h ./arch/arm64/include/asm/rwonce.h ./arch/alpha/include/asm/rwonce.h Signed-off-by: Tiezhu Yang --- include/linux/compiler.h | 6 ++ 1 file changed, 6 insertions(+) diff --git a/include/linux/compiler.h b/include/linux/compiler.h index b8fe0c2..bdbe759 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -243,6 +243,12 @@ static inline void *offset_to_ptr(const int *off) */ #define prevent_tail_call_optimization() mb() +#ifdef CONFIG_ARM64 #include +#endif + +#ifdef CONFIG_ALPHA +#include +#endif I do not think this fix is correct. x86 does not define its own rwonce.h and still compiles fine. As noted in the above, we have include/asm-generic/rwonce.h. Once you do a proper build, you will have rwonce.h in arch generated directory like -bash-4.4$ find . -name rwonce.h ./include/asm-generic/rwonce.h ./arch/alpha/include/asm/rwonce.h ./arch/arm64/include/asm/rwonce.h ./arch/x86/include/generated/asm/rwonce.h for mips, it should generated in arch/mips/include/generated/asm/rwonce.h. Please double check why this does not happen. #endif /* __LINUX_COMPILER_H */
