[PATCH AUTOSEL for 4.9 260/281] selftests: kselftest_harness: Fix compile warning

[Sasha Levin]

From: MickaÃl SalaÃn <mic@xxxxxxxxxxx>

[ Upstream commit 34a048cc06802556e5f96f325dc32cc2f6a11225 ]

Do not confuse the compiler with a semicolon preceding a block. Replace
the semicolon with an empty block to avoid a warning:

  gcc -Wl,-no-as-needed -Wall -lpthread seccomp_bpf.c -o /.../linux/tools/testing/selftests/seccomp/seccomp_bpf
  In file included from seccomp_bpf.c:40:0:
  seccomp_bpf.c: In function âchange_syscallâ:
  ../kselftest_harness.h:558:2: warning: this âforâ clause does not guard... [-Wmisleading-indentation]
    for (; _metadata->trigger;  _metadata->trigger = __bail(_assert))
    ^
  ../kselftest_harness.h:574:14: note: in expansion of macro âOPTIONAL_HANDLERâ
   } while (0); OPTIONAL_HANDLER(_assert)
                ^~~~~~~~~~~~~~~~
  ../kselftest_harness.h:440:2: note: in expansion of macro â__EXPECTâ
    __EXPECT(expected, seen, ==, 0)
    ^~~~~~~~
  seccomp_bpf.c:1313:2: note: in expansion of macro âEXPECT_EQâ
    EXPECT_EQ(0, ret);
    ^~~~~~~~~
  seccomp_bpf.c:1317:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the âforâ
    {
    ^

Signed-off-by: MickaÃl SalaÃn <mic@xxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Cc: Will Drewry <wad@xxxxxxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 tools/testing/selftests/seccomp/seccomp_bpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index cbb0564c0ec4..f68998149351 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -1318,7 +1318,7 @@ void change_syscall(struct __test_metadata *_metadata,
 	iov.iov_len = sizeof(regs);
 	ret = ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &iov);
 #endif
-	EXPECT_EQ(0, ret);
+	EXPECT_EQ(0, ret) {}
 
 #if defined(__x86_64__) || defined(__i386__) || defined(__powerpc__) || \
     defined(__s390__) || defined(__hppa__)
-- 
2.14.1