| Message ID | 1610535453-2352-3-git-send-email-yangtiezhu@loongson.cn (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | Fix build errors and warnings when make M=samples/bpf | expand |
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 <yangtiezhu@loongson.cn> > --- > 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 <asm/rwonce.h> > +#endif > + > +#ifdef CONFIG_ALPHA > +#include <asm/rwonce.h> > +#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 */ >
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 <yangtiezhu@loongson.cn> > --- > 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 <asm/rwonce.h> > +#endif > + > +#ifdef CONFIG_ALPHA > +#include <asm/rwonce.h> > +#endif > > #endif /* __LINUX_COMPILER_H */ > MBR, Sergei
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 <asm-generic/rwonce.h> Hi Sergei and kernel test robot, Thank you for your suggestion and report, please ignore this patch, sorry for the noise. Thanks, Tiezhu
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 <asm/rwonce.h> +#endif + +#ifdef CONFIG_ALPHA +#include <asm/rwonce.h> +#endif #endif /* __LINUX_COMPILER_H */
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 <yangtiezhu@loongson.cn> --- include/linux/compiler.h | 6 ++++++ 1 file changed, 6 insertions(+)