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Date: Sat, 13 Aug 2022 21:37:51 +0800
From: kernel test robot <lkp@...el.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org
Subject: [jolsa-perf:bpf/tracing_multi_new_2 3/21]
arch/arm64/net/bpf_jit_comp.c:1714:60: warning: declaration of 'struct
bpf_tramp_links' will not be visible outside of this function
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tracing_multi_new_2
head: c0620f064b5146578de80c7bb00febc697cc4890
commit: d408632e1e04f856d9836e842ef6aa2b96710a31 [3/21] bpf: Replace bpf_tramp_link with bpf_tramp_prog
config: arm64-randconfig-r011-20220804 (https://download.01.org/0day-ci/archive/20220813/202208132138.yY3lWP4e-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 26dd42705c2af0b8f6e5d6cdb32c9bd5ed9524eb)
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
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=d408632e1e04f856d9836e842ef6aa2b96710a31
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_new_2
git checkout d408632e1e04f856d9836e842ef6aa2b96710a31
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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:1714:60: warning: declaration of 'struct bpf_tramp_links' will not be visible outside of this function [-Wvisibility]
static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_links *tl,
^
arch/arm64/net/bpf_jit_comp.c:1724:20: error: incomplete definition of type 'struct bpf_tramp_links'
for (i = 0; i < tl->nr_links; i++) {
~~^
arch/arm64/net/bpf_jit_comp.c:1714:60: note: forward declaration of 'struct bpf_tramp_links'
static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_links *tl,
^
arch/arm64/net/bpf_jit_comp.c:1725:26: error: incomplete definition of type 'struct bpf_tramp_links'
invoke_bpf_prog(ctx, tl->links[i], args_off, retval_off,
~~^
arch/arm64/net/bpf_jit_comp.c:1714:60: note: forward declaration of 'struct bpf_tramp_links'
static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_links *tl,
^
arch/arm64/net/bpf_jit_comp.c:1771:17: warning: declaration of 'struct bpf_tramp_links' will not be visible outside of this function [-Wvisibility]
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1783:42: error: subscript of pointer to incomplete type 'struct bpf_tramp_links'
struct bpf_tramp_links *fentry = &tlinks[BPF_TRAMP_FENTRY];
~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1784:41: error: subscript of pointer to incomplete type 'struct bpf_tramp_links'
struct bpf_tramp_links *fexit = &tlinks[BPF_TRAMP_FEXIT];
~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1785:44: error: subscript of pointer to incomplete type 'struct bpf_tramp_links'
struct bpf_tramp_links *fmod_ret = &tlinks[BPF_TRAMP_MODIFY_RETURN];
~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1889:24: error: incomplete definition of type 'struct bpf_tramp_links'
for (i = 0; i < fentry->nr_links; i++)
~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1890:30: error: incomplete definition of type 'struct bpf_tramp_links'
invoke_bpf_prog(ctx, fentry->links[i], args_off,
~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1894:14: error: incomplete definition of type 'struct bpf_tramp_links'
if (fmod_ret->nr_links) {
~~~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1895:30: error: incomplete definition of type 'struct bpf_tramp_links'
branches = kcalloc(fmod_ret->nr_links, sizeof(u32 *),
~~~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1900:27: error: incompatible pointer types passing 'struct bpf_tramp_links *' to parameter of type 'struct bpf_tramp_links *' [-Werror,-Wincompatible-pointer-types]
invoke_bpf_mod_ret(ctx, fmod_ret, args_off, retval_off,
^~~~~~~~
arch/arm64/net/bpf_jit_comp.c:1714:77: note: passing argument to parameter 'tl' here
static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_links *tl,
^
arch/arm64/net/bpf_jit_comp.c:1917:26: error: incomplete definition of type 'struct bpf_tramp_links'
for (i = 0; i < fmod_ret->nr_links && ctx->image != NULL; i++) {
~~~~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1922:23: error: incomplete definition of type 'struct bpf_tramp_links'
for (i = 0; i < fexit->nr_links; i++)
~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1923:29: error: incomplete definition of type 'struct bpf_tramp_links'
invoke_bpf_prog(ctx, fexit->links[i], args_off, retval_off,
~~~~~^
arch/arm64/net/bpf_jit_comp.c:1771:17: note: forward declaration of 'struct bpf_tramp_links'
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1970:23: warning: declaration of 'struct bpf_tramp_links' will not be visible outside of this function [-Wvisibility]
u32 flags, struct bpf_tramp_links *tlinks,
^
arch/arm64/net/bpf_jit_comp.c:1968:5: error: conflicting types for 'arch_prepare_bpf_trampoline'
int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image,
^
include/linux/bpf.h:803:5: note: previous declaration is here
int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
^
arch/arm64/net/bpf_jit_comp.c:1985:37: error: incompatible pointer types passing 'struct bpf_tramp_links *' to parameter of type 'struct bpf_tramp_links *' [-Werror,-Wincompatible-pointer-types]
ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nargs, flags);
^~~~~~
arch/arm64/net/bpf_jit_comp.c:1771:34: note: passing argument to parameter 'tlinks' here
struct bpf_tramp_links *tlinks, void *orig_call,
^
arch/arm64/net/bpf_jit_comp.c:1996:37: error: incompatible pointer types passing 'struct bpf_tramp_links *' to parameter of type 'struct bpf_tramp_links *' [-Werror,-Wincompatible-pointer-types]
ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nargs, flags);
vim +1714 arch/arm64/net/bpf_jit_comp.c
efc9909fdce00a82 Xu Kuohai 2022-07-11 1713
efc9909fdce00a82 Xu Kuohai 2022-07-11 @1714 static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_links *tl,
efc9909fdce00a82 Xu Kuohai 2022-07-11 1715 int args_off, int retval_off, int run_ctx_off,
efc9909fdce00a82 Xu Kuohai 2022-07-11 1716 u32 **branches)
efc9909fdce00a82 Xu Kuohai 2022-07-11 1717 {
efc9909fdce00a82 Xu Kuohai 2022-07-11 1718 int i;
efc9909fdce00a82 Xu Kuohai 2022-07-11 1719
efc9909fdce00a82 Xu Kuohai 2022-07-11 1720 /* The first fmod_ret program will receive a garbage return value.
efc9909fdce00a82 Xu Kuohai 2022-07-11 1721 * Set this to 0 to avoid confusing the program.
efc9909fdce00a82 Xu Kuohai 2022-07-11 1722 */
efc9909fdce00a82 Xu Kuohai 2022-07-11 1723 emit(A64_STR64I(A64_ZR, A64_SP, retval_off), ctx);
efc9909fdce00a82 Xu Kuohai 2022-07-11 1724 for (i = 0; i < tl->nr_links; i++) {
efc9909fdce00a82 Xu Kuohai 2022-07-11 1725 invoke_bpf_prog(ctx, tl->links[i], args_off, retval_off,
efc9909fdce00a82 Xu Kuohai 2022-07-11 1726 run_ctx_off, true);
efc9909fdce00a82 Xu Kuohai 2022-07-11 1727 /* if (*(u64 *)(sp + retval_off) != 0)
efc9909fdce00a82 Xu Kuohai 2022-07-11 1728 * goto do_fexit;
efc9909fdce00a82 Xu Kuohai 2022-07-11 1729 */
efc9909fdce00a82 Xu Kuohai 2022-07-11 1730 emit(A64_LDR64I(A64_R(10), A64_SP, retval_off), ctx);
efc9909fdce00a82 Xu Kuohai 2022-07-11 1731 /* Save the location of branch, and generate a nop.
efc9909fdce00a82 Xu Kuohai 2022-07-11 1732 * This nop will be replaced with a cbnz later.
efc9909fdce00a82 Xu Kuohai 2022-07-11 1733 */
efc9909fdce00a82 Xu Kuohai 2022-07-11 1734 branches[i] = ctx->image + ctx->idx;
efc9909fdce00a82 Xu Kuohai 2022-07-11 1735 emit(A64_NOP, ctx);
efc9909fdce00a82 Xu Kuohai 2022-07-11 1736 }
efc9909fdce00a82 Xu Kuohai 2022-07-11 1737 }
efc9909fdce00a82 Xu Kuohai 2022-07-11 1738
:::::: The code at line 1714 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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