linux-kernel - [PATCH] selftests/core: fix conflicting types compile error for close

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Date:   Wed, 27 Oct 2021 13:26:19 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     shuah@...nel.org, christian.brauner@...ntu.com
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] selftests/core: fix conflicting types compile error for close_range()

close_range() test type conflicts with close_range() library call in
x86_64-linux-gnu/bits/unistd_ext.h. Fix it by changing the name to
core_close_range().

gcc -g -I../../../../usr/include/    close_range_test.c  -o ../tools/testing/selftests/core/close_range_test
In file included from close_range_test.c:16:
close_range_test.c:57:6: error: conflicting types for ‘close_range’; have ‘void(struct __test_metadata *)’
   57 | TEST(close_range)
      |      ^~~~~~~~~~~
../kselftest_harness.h:181:21: note: in definition of macro ‘__TEST_IMPL’
  181 |         static void test_name(struct __test_metadata *_metadata); \
      |                     ^~~~~~~~~
close_range_test.c:57:1: note: in expansion of macro ‘TEST’
   57 | TEST(close_range)
      | ^~~~
In file included from /usr/include/unistd.h:1204,
                 from close_range_test.c:13:
/usr/include/x86_64-linux-gnu/bits/unistd_ext.h:56:12: note: previous declaration of ‘close_range’ with type ‘int(unsigned int,  unsigned int,  int)’
   56 | extern int close_range (unsigned int __fd, unsigned int __max_fd,
      |            ^~~~~~~~~~~

Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
---
 tools/testing/selftests/core/close_range_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
index 73eb29c916d1..aa7d13d91963 100644
--- a/tools/testing/selftests/core/close_range_test.c
+++ b/tools/testing/selftests/core/close_range_test.c
@@ -54,7 +54,7 @@ static inline int sys_close_range(unsigned int fd, unsigned int max_fd,
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 #endif
 
-TEST(close_range)
+TEST(core_close_range)
 {
 	int i, ret;
 	int open_fds[101];
-- 
2.32.0