[PATCH] tools/lib/bpf: Fix compiler warning on CentOS 6

[Namhyung Kim <namhyung@kernel.org>]

    CC       libbpf.o
  cc1: warnings being treated as errors
  libbpf.c: In function 'bpf_program__title':
  libbpf.c:1037: error: declaration of 'dup' shadows a global declaration
  /usr/include/unistd.h:528: error: shadowed declaration is here
  mv: cannot stat `./.libbpf.o.tmp': No such file or directory
  make[3]: *** [libbpf.o] Error 1
  make[2]: *** [libbpf-in.o] Error 2
  make[1]: *** [/linux/tools/lib/bpf/libbpf.a] Error 2
  make[1]: *** Waiting for unfinished jobs....

Cc: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/lib/bpf/libbpf.c | 4 ++--
 tools/lib/bpf/libbpf.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 4252fc22f78f..9f3c8cf9249b 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1034,12 +1034,12 @@ int bpf_program__get_private(struct bpf_program *prog, void **ppriv)
 	return 0;
 }
 
-const char *bpf_program__title(struct bpf_program *prog, bool dup)
+const char *bpf_program__title(struct bpf_program *prog, bool needs_copy)
 {
 	const char *title;
 
 	title = prog->section_name;
-	if (dup) {
+	if (needs_copy) {
 		title = strdup(title);
 		if (!title) {
 			pr_warning("failed to strdup program title\n");
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index f16170c95ffd..bc80af03c6f4 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -63,7 +63,7 @@ int bpf_program__set_private(struct bpf_program *prog, void *priv,
 int bpf_program__get_private(struct bpf_program *prog,
 			     void **ppriv);
 
-const char *bpf_program__title(struct bpf_program *prog, bool dup);
+const char *bpf_program__title(struct bpf_program *prog, bool needs_copy);
 
 int bpf_program__fd(struct bpf_program *prog);
 
-- 
2.6.2