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Date: Sun, 05 Jun 2016 09:53:05 +0200 From: Daniel Borkmann <daniel@...earbox.net> To: kbuild test robot <lkp@...el.com>, Zi Shen Lim <zlim.lnx@...il.com> CC: kbuild-all@...org, "David S. Miller" <davem@...emloft.net>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Yang Shi <yang.shi@...aro.org>, Alexei Starovoitov <ast@...nel.org>, netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net-next 1/3] arm64: bpf: implement bpf_tail_call() helper On 06/05/2016 01:46 AM, kbuild test robot wrote: > Hi, > > [auto build test ERROR on net-next/master] > > url: https://github.com/0day-ci/linux/commits/Zi-Shen-Lim/arm64-bpf-implement-bpf_tail_call-helper/20160605-060435 > config: arm64-defconfig (attached as .config) > compiler: aarch64-linux-gnu-gcc (Debian 5.3.1-8) 5.3.1 20160205 > reproduce: > wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # save the attached .config to linux build tree > make.cross ARCH=arm64 > > All errors (new ones prefixed by >>): > > In file included from arch/arm64/net/bpf_jit_comp.c:21:0: > include/linux/bpf.h: In function 'bpf_prog_get': >>> include/linux/bpf.h:235:9: error: implicit declaration of function 'ERR_PTR' [-Werror=implicit-function-declaration] > return ERR_PTR(-EOPNOTSUPP); > ^ > include/linux/bpf.h:235:9: warning: return makes pointer from integer without a cast [-Wint-conversion] > In file included from include/linux/rwsem.h:17:0, > from include/linux/mm_types.h:10, > from include/linux/sched.h:27, > from arch/arm64/include/asm/compat.h:25, > from arch/arm64/include/asm/stat.h:23, > from include/linux/stat.h:5, > from include/linux/compat.h:12, > from include/linux/filter.h:10, > from arch/arm64/net/bpf_jit_comp.c:22: > include/linux/err.h: At top level: >>> include/linux/err.h:23:35: error: conflicting types for 'ERR_PTR' > static inline void * __must_check ERR_PTR(long error) > ^ > In file included from arch/arm64/net/bpf_jit_comp.c:21:0: > include/linux/bpf.h:235:9: note: previous implicit declaration of 'ERR_PTR' was here > return ERR_PTR(-EOPNOTSUPP); > ^ > cc1: some warnings being treated as errors Looks like including linux/bpf.h at the very beginning causes issues when bpf syscall is disabled. We should probably just include linux/err.h from bpf.h.
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