From: kernel test robot <lkp@intel.com>
To: Andrii Nakryiko <andrii@kernel.org>,
bpf@vger.kernel.org, netdev@vger.kernel.org, ast@fb.com,
daniel@iogearbox.net
Cc: kbuild-all@lists.01.org, andrii@kernel.org, kernel-team@fb.com,
Hao Luo <haoluo@google.com>
Subject: Re: [PATCH bpf-next 2/4] bpf: support BPF ksym variables in kernel modules
Date: Wed, 6 Jan 2021 16:16:31 +0800 [thread overview]
Message-ID: <202101061625.D0C0F3ZJ-lkp@intel.com> (raw)
In-Reply-To: <20210106064048.2554276-3-andrii@kernel.org>
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Hi Andrii,
I love your patch! Perhaps something to improve:
[auto build test WARNING on bpf-next/master]
url: https://github.com/0day-ci/linux/commits/Andrii-Nakryiko/Support-kernel-module-ksym-variables/20210106-144531
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: nds32-defconfig (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/1dde2eabb1a7670d0e764e46dae1ef0a9abf0466
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Andrii-Nakryiko/Support-kernel-module-ksym-variables/20210106-144531
git checkout 1dde2eabb1a7670d0e764e46dae1ef0a9abf0466
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
kernel/bpf/core.c:1350:12: warning: no previous prototype for 'bpf_probe_read_kernel' [-Wmissing-prototypes]
1350 | u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
| ^~~~~~~~~~~~~~~~~~~~~
In file included from kernel/bpf/core.c:21:
kernel/bpf/core.c: In function '___bpf_prog_run':
include/linux/filter.h:888:3: warning: cast between incompatible function types from 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} to 'u64 (*)(u64, u64, u64, u64, u64, const struct bpf_insn *)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, const struct bpf_insn *)'} [-Wcast-function-type]
888 | ((u64 (*)(u64, u64, u64, u64, u64, const struct bpf_insn *)) \
| ^
kernel/bpf/core.c:1518:13: note: in expansion of macro '__bpf_call_base_args'
1518 | BPF_R0 = (__bpf_call_base_args + insn->imm)(BPF_R1, BPF_R2,
| ^~~~~~~~~~~~~~~~~~~~
kernel/bpf/core.c: At top level:
kernel/bpf/core.c:1704:6: warning: no previous prototype for 'bpf_patch_call_args' [-Wmissing-prototypes]
1704 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth)
| ^~~~~~~~~~~~~~~~~~~
In file included from kernel/bpf/core.c:21:
kernel/bpf/core.c: In function 'bpf_patch_call_args':
include/linux/filter.h:888:3: warning: cast between incompatible function types from 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} to 'u64 (*)(u64, u64, u64, u64, u64, const struct bpf_insn *)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, const struct bpf_insn *)'} [-Wcast-function-type]
888 | ((u64 (*)(u64, u64, u64, u64, u64, const struct bpf_insn *)) \
| ^
kernel/bpf/core.c:1709:3: note: in expansion of macro '__bpf_call_base_args'
1709 | __bpf_call_base_args;
| ^~~~~~~~~~~~~~~~~~~~
kernel/bpf/core.c: At top level:
kernel/bpf/core.c:2102:6: warning: no previous prototype for '__bpf_free_used_maps' [-Wmissing-prototypes]
2102 | void __bpf_free_used_maps(struct bpf_prog_aux *aux,
| ^~~~~~~~~~~~~~~~~~~~
>> kernel/bpf/core.c:2122:6: warning: no previous prototype for '__bpf_free_used_btfs' [-Wmissing-prototypes]
2122 | void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
| ^~~~~~~~~~~~~~~~~~~~
vim +/__bpf_free_used_btfs +2122 kernel/bpf/core.c
2121
> 2122 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
2123 struct btf_mod_pair *used_btfs, u32 len)
2124 {
2125 #ifdef CONFIG_BPF_SYSCALL
2126 struct btf_mod_pair *btf_mod;
2127 u32 i;
2128
2129 for (i = 0; i < len; i++) {
2130 btf_mod = &used_btfs[i];
2131 if (btf_mod->module)
2132 module_put(btf_mod->module);
2133 btf_put(btf_mod->btf);
2134 }
2135 #endif
2136 }
2137
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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next prev parent reply other threads:[~2021-01-06 8:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-06 6:40 [PATCH bpf-next 0/4] Support kernel module ksym variables Andrii Nakryiko
2021-01-06 6:40 ` [PATCH bpf-next 1/4] selftests/bpf: sync RCU before unloading bpf_testmod Andrii Nakryiko
2021-01-06 6:40 ` [PATCH bpf-next 2/4] bpf: support BPF ksym variables in kernel modules Andrii Nakryiko
2021-01-06 8:16 ` kernel test robot [this message]
2021-01-06 8:31 ` kernel test robot
2021-01-06 6:40 ` [PATCH bpf-next 3/4] libbpf: support kernel module ksym externs Andrii Nakryiko
2021-01-06 6:40 ` [PATCH bpf-next 4/4] selftests/bpf: test " Andrii Nakryiko
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