diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2020-07-14 12:25:33 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-07-14 10:20:31 -0700 |
| commit | 079ef53673f2e3b3ee1728800311f20f28eed4f7 (patch) | |
| tree | 95055f93a2154cbb0ffa02a322bb66b1cf8e19d6 /include/linux/btf_ids.h | |
| parent | f7d40ee7eff8fde2b0701b80c2aa3ba354f8f520 (diff) | |
bpf: Fix build for disabled CONFIG_DEBUG_INFO_BTF option
Stephen reported following linker warnings on powerpc build:
ld: warning: orphan section `.BTF_ids' from `kernel/trace/bpf_trace.o' being placed in section `.BTF_ids'
ld: warning: orphan section `.BTF_ids' from `kernel/bpf/btf.o' being placed in section `.BTF_ids'
ld: warning: orphan section `.BTF_ids' from `kernel/bpf/stackmap.o' being placed in section `.BTF_ids'
ld: warning: orphan section `.BTF_ids' from `net/core/filter.o' being placed in section `.BTF_ids'
ld: warning: orphan section `.BTF_ids' from `kernel/trace/bpf_trace.o' being placed in section `.BTF_ids'
It's because we generated .BTF_ids section even when
CONFIG_DEBUG_INFO_BTF is not enabled. Fixing this by
generating empty btf_id arrays for this case.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/bpf/20200714102534.299280-1-jolsa@kernel.org
Diffstat (limited to 'include/linux/btf_ids.h')
| -rw-r--r-- | include/linux/btf_ids.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/btf_ids.h b/include/linux/btf_ids.h index fe019774f8a7..b3c73db9587c 100644 --- a/include/linux/btf_ids.h +++ b/include/linux/btf_ids.h @@ -3,6 +3,8 @@ #ifndef _LINUX_BTF_IDS_H #define _LINUX_BTF_IDS_H +#ifdef CONFIG_DEBUG_INFO_BTF + #include <linux/compiler.h> /* for __PASTE */ /* @@ -83,5 +85,12 @@ asm( \ ".zero 4 \n" \ ".popsection; \n"); +#else + +#define BTF_ID_LIST(name) static u32 name[5]; +#define BTF_ID(prefix, name) +#define BTF_ID_UNUSED + +#endif /* CONFIG_DEBUG_INFO_BTF */ #endif |