From: Tiezhu Yang <yangtiezhu@loongson.cn>
To: Yonghong Song <yhs@fb.com>,
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
Nathan Chancellor <natechancellor@gmail.com>,
Nick Desaulniers <ndesaulniers@google.com>
Cc: linux-sparse@vger.kernel.org, netdev@vger.kernel.org,
bpf@vger.kernel.org, clang-built-linux@googlegroups.com,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
Xuefeng Li <lixuefeng@loongson.cn>,
Sergei Shtylyov <sergei.shtylyov@gmail.com>,
kernel test robot <lkp@intel.com>
Subject: Re: [PATCH 2/2] compiler.h: Include asm/rwonce.h under ARM64 and ALPHA to fix build errors
Date: Mon, 18 Jan 2021 17:25:35 +0800 [thread overview]
Message-ID: <5663510d-2aa5-c1f2-d0c8-5313cc2a4a18@loongson.cn> (raw)
In-Reply-To: <33050fcc-a4a0-af2e-6fba-dca248f5f23b@fb.com>
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
next prev parent reply other threads:[~2021-01-18 10:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 10:57 [PATCH 0/2] Fix build errors and warnings when make M=samples/bpf Tiezhu Yang
2021-01-13 10:57 ` [PATCH bpf 1/2] samples/bpf: Set flag __SANE_USERSPACE_TYPES__ for MIPS to fix build warnings Tiezhu Yang
2021-01-13 17:12 ` Yonghong Song
2021-01-18 3:22 ` Tiezhu Yang
2021-01-18 18:44 ` Yonghong Song
2021-01-13 10:57 ` [PATCH 2/2] compiler.h: Include asm/rwonce.h under ARM64 and ALPHA to fix build errors Tiezhu Yang
2021-01-13 17:14 ` Yonghong Song
2021-01-18 9:25 ` Tiezhu Yang [this message]
2021-01-14 8:40 ` Sergei Shtylyov
2021-01-13 17:16 ` [PATCH 0/2] Fix build errors and warnings when make M=samples/bpf Yonghong Song
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