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Date: Tue, 18 Oct 2022 17:22:21 +0800
From: kernel test robot <lkp@...el.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [jolsa-perf:bpf/tracing_multi_ng_4 16/23]
arch/arm64/net/bpf_jit_comp.c:1642:57: warning: 'struct bpf_tramp_link'
declared inside parameter list will not be visible outside of this
definition or declaration
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tracing_multi_ng_4
head: e3fa3b908cc734f85477c07a0ba93480bd80702c
commit: 9a60501c22c5aa5f62edafc303eb2ac0ec85143d [16/23] bpf: Store trampoline progs in arrays
config: arm64-buildonly-randconfig-r001-20221017
compiler: aarch64-linux-gcc (GCC) 12.1.0
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://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=9a60501c22c5aa5f62edafc303eb2ac0ec85143d
git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
git fetch --no-tags jolsa-perf bpf/tracing_multi_ng_4
git checkout 9a60501c22c5aa5f62edafc303eb2ac0ec85143d
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/net/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> arch/arm64/net/bpf_jit_comp.c:1642:57: warning: 'struct bpf_tramp_link' declared inside parameter list will not be visible outside of this definition or declaration
1642 | static void invoke_bpf_prog(struct jit_ctx *ctx, struct bpf_tramp_link *l,
| ^~~~~~~~~~~~~~
arch/arm64/net/bpf_jit_comp.c: In function 'invoke_bpf_prog':
arch/arm64/net/bpf_jit_comp.c:1649:31: error: invalid use of undefined type 'struct bpf_tramp_link'
1649 | struct bpf_prog *p = l->link.prog;
| ^~
arch/arm64/net/bpf_jit_comp.c:1660:14: error: invalid use of undefined type 'struct bpf_tramp_link'
1660 | if (l->cookie == 0) {
| ^~
arch/arm64/net/bpf_jit_comp.c:1664:46: error: invalid use of undefined type 'struct bpf_tramp_link'
1664 | emit_a64_mov_i64(A64_R(10), l->cookie, ctx);
| ^~
arch/arm64/net/bpf_jit_comp.c: At top level:
arch/arm64/net/bpf_jit_comp.c:1714:60: warning: 'struct bpf_tramp_links' declared inside parameter list will not be visible outside of this definition or declaration
1714 | static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_links *tl,
| ^~~~~~~~~~~~~~~
arch/arm64/net/bpf_jit_comp.c: In function 'invoke_bpf_mod_ret':
arch/arm64/net/bpf_jit_comp.c:1724:27: error: invalid use of undefined type 'struct bpf_tramp_links'
1724 | for (i = 0; i < tl->nr_links; i++) {
| ^~
arch/arm64/net/bpf_jit_comp.c:1725:40: error: invalid use of undefined type 'struct bpf_tramp_links'
1725 | invoke_bpf_prog(ctx, tl->links[i], args_off, retval_off,
| ^~
arch/arm64/net/bpf_jit_comp.c: At top level:
arch/arm64/net/bpf_jit_comp.c:1771:38: warning: 'struct bpf_tramp_links' declared inside parameter list will not be visible outside of this definition or declaration
1771 | struct bpf_tramp_links *tlinks, void *orig_call,
| ^~~~~~~~~~~~~~~
arch/arm64/net/bpf_jit_comp.c: In function 'prepare_trampoline':
arch/arm64/net/bpf_jit_comp.c:1783:49: error: invalid use of undefined type 'struct bpf_tramp_links'
1783 | struct bpf_tramp_links *fentry = &tlinks[BPF_TRAMP_FENTRY];
| ^
arch/arm64/net/bpf_jit_comp.c:1784:48: error: invalid use of undefined type 'struct bpf_tramp_links'
1784 | struct bpf_tramp_links *fexit = &tlinks[BPF_TRAMP_FEXIT];
| ^
arch/arm64/net/bpf_jit_comp.c:1785:51: error: invalid use of undefined type 'struct bpf_tramp_links'
1785 | struct bpf_tramp_links *fmod_ret = &tlinks[BPF_TRAMP_MODIFY_RETURN];
| ^
arch/arm64/net/bpf_jit_comp.c:1889:31: error: invalid use of undefined type 'struct bpf_tramp_links'
1889 | for (i = 0; i < fentry->nr_links; i++)
| ^~
arch/arm64/net/bpf_jit_comp.c:1890:44: error: invalid use of undefined type 'struct bpf_tramp_links'
1890 | invoke_bpf_prog(ctx, fentry->links[i], args_off,
| ^~
arch/arm64/net/bpf_jit_comp.c:1894:21: error: invalid use of undefined type 'struct bpf_tramp_links'
1894 | if (fmod_ret->nr_links) {
| ^~
arch/arm64/net/bpf_jit_comp.c:1895:44: error: invalid use of undefined type 'struct bpf_tramp_links'
1895 | branches = kcalloc(fmod_ret->nr_links, sizeof(__le32 *),
| ^~
arch/arm64/net/bpf_jit_comp.c:1900:41: error: passing argument 2 of 'invoke_bpf_mod_ret' from incompatible pointer type [-Werror=incompatible-pointer-types]
1900 | invoke_bpf_mod_ret(ctx, fmod_ret, args_off, retval_off,
| ^~~~~~~~
| |
| struct bpf_tramp_links *
arch/arm64/net/bpf_jit_comp.c:1714:77: note: expected 'struct bpf_tramp_links *' but argument is of type 'struct bpf_tramp_links *'
1714 | static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_links *tl,
| ~~~~~~~~~~~~~~~~~~~~~~~~^~
arch/arm64/net/bpf_jit_comp.c:1917:33: error: invalid use of undefined type 'struct bpf_tramp_links'
1917 | for (i = 0; i < fmod_ret->nr_links && ctx->image != NULL; i++) {
| ^~
arch/arm64/net/bpf_jit_comp.c:1922:30: error: invalid use of undefined type 'struct bpf_tramp_links'
1922 | for (i = 0; i < fexit->nr_links; i++)
| ^~
arch/arm64/net/bpf_jit_comp.c:1923:43: error: invalid use of undefined type 'struct bpf_tramp_links'
1923 | invoke_bpf_prog(ctx, fexit->links[i], args_off, retval_off,
| ^~
arch/arm64/net/bpf_jit_comp.c: At top level:
arch/arm64/net/bpf_jit_comp.c:1970:51: warning: 'struct bpf_tramp_links' declared inside parameter list will not be visible outside of this definition or declaration
1970 | u32 flags, struct bpf_tramp_links *tlinks,
| ^~~~~~~~~~~~~~~
arch/arm64/net/bpf_jit_comp.c:1968:5: error: conflicting types for 'arch_prepare_bpf_trampoline'; have 'int(struct bpf_tramp_image *, void *, void *, const struct btf_func_model *, u32, struct bpf_tramp_links *, void *)' {aka 'int(struct bpf_tramp_image *, void *, void *, const struct btf_func_model *, unsigned int, struct bpf_tramp_links *, void *)'}
1968 | int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from arch/arm64/net/bpf_jit_comp.c:11:
include/linux/bpf.h:858:5: note: previous declaration of 'arch_prepare_bpf_trampoline' with type 'int(struct bpf_tramp_image *, void *, void *, const struct btf_func_model *, u32, struct bpf_tramp_progs *, void *)' {aka 'int(struct bpf_tramp_image *, void *, void *, const struct btf_func_model *, unsigned int, struct bpf_tramp_progs *, void *)'}
858 | int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/net/bpf_jit_comp.c: In function 'arch_prepare_bpf_trampoline':
arch/arm64/net/bpf_jit_comp.c:1991:44: error: passing argument 3 of 'prepare_trampoline' from incompatible pointer type [-Werror=incompatible-pointer-types]
1991 | ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nargs, flags);
| ^~~~~~
| |
| struct bpf_tramp_links *
arch/arm64/net/bpf_jit_comp.c:1771:55: note: expected 'struct bpf_tramp_links *' but argument is of type 'struct bpf_tramp_links *'
1771 | struct bpf_tramp_links *tlinks, void *orig_call,
| ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
arch/arm64/net/bpf_jit_comp.c:2002:44: error: passing argument 3 of 'prepare_trampoline' from incompatible pointer type [-Werror=incompatible-pointer-types]
2002 | ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nargs, flags);
| ^~~~~~
| |
| struct bpf_tramp_links *
arch/arm64/net/bpf_jit_comp.c:1771:55: note: expected 'struct bpf_tramp_links *' but argument is of type 'struct bpf_tramp_links *'
1771 | struct bpf_tramp_links *tlinks, void *orig_call,
| ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
cc1: some warnings being treated as errors
vim +1642 arch/arm64/net/bpf_jit_comp.c
b2ad54e1533e91 Xu Kuohai 2022-07-11 1641
efc9909fdce00a Xu Kuohai 2022-07-11 @1642 static void invoke_bpf_prog(struct jit_ctx *ctx, struct bpf_tramp_link *l,
efc9909fdce00a Xu Kuohai 2022-07-11 1643 int args_off, int retval_off, int run_ctx_off,
efc9909fdce00a Xu Kuohai 2022-07-11 1644 bool save_ret)
efc9909fdce00a Xu Kuohai 2022-07-11 1645 {
aada476655461a Xu Kuohai 2022-08-08 1646 __le32 *branch;
efc9909fdce00a Xu Kuohai 2022-07-11 1647 u64 enter_prog;
efc9909fdce00a Xu Kuohai 2022-07-11 1648 u64 exit_prog;
efc9909fdce00a Xu Kuohai 2022-07-11 1649 struct bpf_prog *p = l->link.prog;
efc9909fdce00a Xu Kuohai 2022-07-11 1650 int cookie_off = offsetof(struct bpf_tramp_run_ctx, bpf_cookie);
efc9909fdce00a Xu Kuohai 2022-07-11 1651
efc9909fdce00a Xu Kuohai 2022-07-11 1652 if (p->aux->sleepable) {
efc9909fdce00a Xu Kuohai 2022-07-11 1653 enter_prog = (u64)__bpf_prog_enter_sleepable;
efc9909fdce00a Xu Kuohai 2022-07-11 1654 exit_prog = (u64)__bpf_prog_exit_sleepable;
efc9909fdce00a Xu Kuohai 2022-07-11 1655 } else {
efc9909fdce00a Xu Kuohai 2022-07-11 1656 enter_prog = (u64)__bpf_prog_enter;
efc9909fdce00a Xu Kuohai 2022-07-11 1657 exit_prog = (u64)__bpf_prog_exit;
efc9909fdce00a Xu Kuohai 2022-07-11 1658 }
efc9909fdce00a Xu Kuohai 2022-07-11 1659
efc9909fdce00a Xu Kuohai 2022-07-11 1660 if (l->cookie == 0) {
efc9909fdce00a Xu Kuohai 2022-07-11 1661 /* if cookie is zero, one instruction is enough to store it */
efc9909fdce00a Xu Kuohai 2022-07-11 1662 emit(A64_STR64I(A64_ZR, A64_SP, run_ctx_off + cookie_off), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1663 } else {
efc9909fdce00a Xu Kuohai 2022-07-11 1664 emit_a64_mov_i64(A64_R(10), l->cookie, ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1665 emit(A64_STR64I(A64_R(10), A64_SP, run_ctx_off + cookie_off),
efc9909fdce00a Xu Kuohai 2022-07-11 1666 ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1667 }
efc9909fdce00a Xu Kuohai 2022-07-11 1668
efc9909fdce00a Xu Kuohai 2022-07-11 1669 /* save p to callee saved register x19 to avoid loading p with mov_i64
efc9909fdce00a Xu Kuohai 2022-07-11 1670 * each time.
efc9909fdce00a Xu Kuohai 2022-07-11 1671 */
efc9909fdce00a Xu Kuohai 2022-07-11 1672 emit_addr_mov_i64(A64_R(19), (const u64)p, ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1673
efc9909fdce00a Xu Kuohai 2022-07-11 1674 /* arg1: prog */
efc9909fdce00a Xu Kuohai 2022-07-11 1675 emit(A64_MOV(1, A64_R(0), A64_R(19)), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1676 /* arg2: &run_ctx */
efc9909fdce00a Xu Kuohai 2022-07-11 1677 emit(A64_ADD_I(1, A64_R(1), A64_SP, run_ctx_off), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1678
efc9909fdce00a Xu Kuohai 2022-07-11 1679 emit_call(enter_prog, ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1680
efc9909fdce00a Xu Kuohai 2022-07-11 1681 /* if (__bpf_prog_enter(prog) == 0)
efc9909fdce00a Xu Kuohai 2022-07-11 1682 * goto skip_exec_of_prog;
efc9909fdce00a Xu Kuohai 2022-07-11 1683 */
efc9909fdce00a Xu Kuohai 2022-07-11 1684 branch = ctx->image + ctx->idx;
efc9909fdce00a Xu Kuohai 2022-07-11 1685 emit(A64_NOP, ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1686
efc9909fdce00a Xu Kuohai 2022-07-11 1687 /* save return value to callee saved register x20 */
efc9909fdce00a Xu Kuohai 2022-07-11 1688 emit(A64_MOV(1, A64_R(20), A64_R(0)), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1689
efc9909fdce00a Xu Kuohai 2022-07-11 1690 emit(A64_ADD_I(1, A64_R(0), A64_SP, args_off), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1691 if (!p->jited)
efc9909fdce00a Xu Kuohai 2022-07-11 1692 emit_addr_mov_i64(A64_R(1), (const u64)p->insnsi, ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1693
efc9909fdce00a Xu Kuohai 2022-07-11 1694 emit_call((const u64)p->bpf_func, ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1695
efc9909fdce00a Xu Kuohai 2022-07-11 1696 if (save_ret)
efc9909fdce00a Xu Kuohai 2022-07-11 1697 emit(A64_STR64I(A64_R(0), A64_SP, retval_off), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1698
efc9909fdce00a Xu Kuohai 2022-07-11 1699 if (ctx->image) {
efc9909fdce00a Xu Kuohai 2022-07-11 1700 int offset = &ctx->image[ctx->idx] - branch;
aada476655461a Xu Kuohai 2022-08-08 1701 *branch = cpu_to_le32(A64_CBZ(1, A64_R(0), offset));
efc9909fdce00a Xu Kuohai 2022-07-11 1702 }
efc9909fdce00a Xu Kuohai 2022-07-11 1703
efc9909fdce00a Xu Kuohai 2022-07-11 1704 /* arg1: prog */
efc9909fdce00a Xu Kuohai 2022-07-11 1705 emit(A64_MOV(1, A64_R(0), A64_R(19)), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1706 /* arg2: start time */
efc9909fdce00a Xu Kuohai 2022-07-11 1707 emit(A64_MOV(1, A64_R(1), A64_R(20)), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1708 /* arg3: &run_ctx */
efc9909fdce00a Xu Kuohai 2022-07-11 1709 emit(A64_ADD_I(1, A64_R(2), A64_SP, run_ctx_off), ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1710
efc9909fdce00a Xu Kuohai 2022-07-11 1711 emit_call(exit_prog, ctx);
efc9909fdce00a Xu Kuohai 2022-07-11 1712 }
efc9909fdce00a Xu Kuohai 2022-07-11 1713
:::::: The code at line 1642 was first introduced by commit
:::::: efc9909fdce00a827a37609628223cd45bf95d0b bpf, arm64: Add bpf trampoline for arm64
:::::: TO: Xu Kuohai <xukuohai@...wei.com>
:::::: CC: Daniel Borkmann <daniel@...earbox.net>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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