perf test: Fix build of BPF and LLVM on older glibc libraries

  $ rpm -q glibc
  glibc-2.12-1.166.el6_7.1.x86_64

<SNIP>
    CC       /tmp/build/perf/tests/llvm.o
  cc1: warnings being treated as errors
  tests/llvm.c: In function ‘test_llvm__fetch_bpf_obj’:
  tests/llvm.c:53: error: declaration of ‘index’ shadows a global declaration
  /usr/include/string.h:489: error: shadowed declaration is here
<SNIP>
    CC       /tmp/build/perf/tests/bpf.o
  cc1: warnings being treated as errors
  tests/bpf.c: In function ‘__test__bpf’:
  tests/bpf.c:149: error: declaration of ‘index’ shadows a global declaration
  /usr/include/string.h:489: error: shadowed declaration is here
<SNIP>

Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: pi3orama@163.com
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Fixes: b31de018a628 ("perf test: Enhance the LLVM test: update basic BPF test program")
Fixes: ba1fae431e74 ("perf test: Add 'perf test BPF'")
Link: http://lkml.kernel.org/n/tip-akpo4r750oya2phxoh9e3447@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 11 insertions, 11 deletions

diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index ec16f7812c8b..6ebfdee3e2c6 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -146,7 +146,7 @@ prepare_bpf(void *obj_buf, size_t obj_buf_sz, const char *name)
         return obj;
 }
 
-static int __test__bpf(int index)
+static int __test__bpf(int idx)
 {
         int ret;
         void *obj_buf;
@@ -154,27 +154,27 @@ static int __test__bpf(int index)
         struct bpf_object *obj;
 
         ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
-                                       bpf_testcase_table[index].prog_id,
+                                       bpf_testcase_table[idx].prog_id,
                                        true);
         if (ret != TEST_OK || !obj_buf || !obj_buf_sz) {
                 pr_debug("Unable to get BPF object, %s\n",
-                         bpf_testcase_table[index].msg_compile_fail);
-                if (index == 0)
+                         bpf_testcase_table[idx].msg_compile_fail);
+                if (idx == 0)
                         return TEST_SKIP;
                 else
                         return TEST_FAIL;
         }
 
         obj = prepare_bpf(obj_buf, obj_buf_sz,
-                          bpf_testcase_table[index].name);
+                          bpf_testcase_table[idx].name);
         if (!obj) {
                 ret = TEST_FAIL;
                 goto out;
         }
 
         ret = do_test(obj,
-                      bpf_testcase_table[index].target_func,
-                      bpf_testcase_table[index].expect_result);
+                      bpf_testcase_table[idx].target_func,
+                      bpf_testcase_table[idx].expect_result);
 out:
         bpf__clear();
         return ret;
diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
index bc4cf507cde5..366e38ba8b49 100644
--- a/tools/perf/tests/llvm.c
+++ b/tools/perf/tests/llvm.c
@@ -50,7 +50,7 @@ static struct {
 int
 test_llvm__fetch_bpf_obj(void **p_obj_buf,
                          size_t *p_obj_buf_sz,
-                         enum test_llvm__testcase index,
+                         enum test_llvm__testcase idx,
                          bool force)
 {
         const char *source;
@@ -59,11 +59,11 @@ test_llvm__fetch_bpf_obj(void **p_obj_buf,
         char *tmpl_new = NULL, *clang_opt_new = NULL;
         int err, old_verbose, ret = TEST_FAIL;
 
-        if (index >= __LLVM_TESTCASE_MAX)
+        if (idx >= __LLVM_TESTCASE_MAX)
                 return TEST_FAIL;
 
-        source = bpf_source_table[index].source;
-        desc = bpf_source_table[index].desc;
+        source = bpf_source_table[idx].source;
+        desc = bpf_source_table[idx].desc;
 
         perf_config(perf_config_cb, NULL);