selftests: kselftest: Make ksft_exit functions return void instead of int

Commit f7d5bcd ("selftests: kselftest: Mark functions that
unconditionally call exit() as __noreturn") marked functions that call
exit() as __noreturn but it did not change the return type of these
functions from 'void' to 'int' like it should have (since a noreturn
function by definition cannot return an integer because it does not
return...) because there were many tests that return the result of the
ksft_exit functions, even though it has never been used due to calling
exit().

Now that all uses of 'return ksft_exit...()' have been cleaned up
properly, change the types of the ksft_exit...() functions to void to
match their __noreturn nature.

Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

Author: nathanchance

tools/testing/selftests/kselftest.h

@@ -329,13 +329,13 @@ void ksft_test_result_code(int exit_code, const char *test_name,
 		break;						\
 	} } while (0)
 
-static inline __noreturn int ksft_exit_pass(void)
+static inline __noreturn void ksft_exit_pass(void)
 {
 	ksft_print_cnts();
 	exit(KSFT_PASS);
 }
 
-static inline __noreturn int ksft_exit_fail(void)
+static inline __noreturn void ksft_exit_fail(void)
 {
 	ksft_print_cnts();
 	exit(KSFT_FAIL);
@@ -362,7 +362,7 @@ static inline __noreturn int ksft_exit_fail(void)
 		  ksft_cnt.ksft_xfail +	\
 		  ksft_cnt.ksft_xskip)
 
-static inline __noreturn __printf(1, 2) int ksft_exit_fail_msg(const char *msg, ...)
+static inline __noreturn __printf(1, 2) void ksft_exit_fail_msg(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -390,19 +390,19 @@ static inline __noreturn void ksft_exit_fail_perror(const char *msg)
 #endif
 }
 
-static inline __noreturn int ksft_exit_xfail(void)
+static inline __noreturn void ksft_exit_xfail(void)
 {
 	ksft_print_cnts();
 	exit(KSFT_XFAIL);
 }
 
-static inline __noreturn int ksft_exit_xpass(void)
+static inline __noreturn void ksft_exit_xpass(void)
 {
 	ksft_print_cnts();
 	exit(KSFT_XPASS);
 }
 
-static inline __noreturn __printf(1, 2) int ksft_exit_skip(const char *msg, ...)
+static inline __noreturn __printf(1, 2) void ksft_exit_skip(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;