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authorYonghong Song <yhs@fb.com>2019-02-05 11:48:22 -0800
committerAlexei Starovoitov <ast@kernel.org>2019-02-05 18:38:58 -0800
commita6c109a6b746509f5030d20d57b35e566cf3a04f (patch)
tree7184c63090c97c78e8dbe301da9f5a8aae47a262 /tools/lib/bpf/btf.h
parenttools/bpf: fix a selftest test_btf failure (diff)
downloadlinux-dev-a6c109a6b746509f5030d20d57b35e566cf3a04f.tar.xz
linux-dev-a6c109a6b746509f5030d20d57b35e566cf3a04f.zip
tools/bpf: add const qualifier to btf__get_map_kv_tids() map_name parameter
Commit 96408c43447a ("tools/bpf: implement libbpf btf__get_map_kv_tids() API function") added the API function btf__get_map_kv_tids(): btf__get_map_kv_tids(const struct btf *btf, char *map_name, ...) The parameter map_name has type "char *". This is okay inside libbpf library since the map_name is from bpf_map->name which also has type "char *". This will be problematic if the caller for map_name already has attribute "const", e.g., from C++ string.c_str(). It will result in either a warning or an error. /home/yhs/work/bcc/src/cc/btf.cc:166:51: error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive] return btf__get_map_kv_tids(btf_, map_name.c_str() This patch added "const" attributes to map_name parameter. Fixes: 96408c43447a ("tools/bpf: implement libbpf btf__get_map_kv_tids() API function") Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to '')
-rw-r--r--tools/lib/bpf/btf.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h
index 25a9d2db035d..b393da90cc85 100644
--- a/tools/lib/bpf/btf.h
+++ b/tools/lib/bpf/btf.h
@@ -69,7 +69,7 @@ LIBBPF_API void btf__get_strings(const struct btf *btf, const char **strings,
__u32 *str_len);
LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 offset);
LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf);
-LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, char *map_name,
+LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, const char *map_name,
__u32 expected_key_size,
__u32 expected_value_size,
__u32 *key_type_id, __u32 *value_type_id);