From: Michael Ellerman <mpe@ellerman.id.au>
Date: Thu, 15 Oct 2015 00:39:28 +0000 (+1100)
Subject: selftests/powerpc: Allow the tm-syscall test to build with old headers
X-Git-Tag: firefly_0821_release~176^2~775^2~18
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=20d09927e669b7e92795c804a3cf82d6c4f3c909;p=firefly-linux-kernel-4.4.55.git

selftests/powerpc: Allow the tm-syscall test to build with old headers

When building against older kernel headers, currently the tm-syscall
test fails to build because PPC_FEATURE2_HTM_NOSC is not defined.

Tweak the test so that if PPC_FEATURE2_HTM_NOSC is not defined it still
builds, but prints a warning at run time and marks the test as skipped.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---

diff --git a/tools/testing/selftests/powerpc/tm/tm-syscall.c b/tools/testing/selftests/powerpc/tm/tm-syscall.c
index 1276e23da63b..e835bf7ec7ae 100644
--- a/tools/testing/selftests/powerpc/tm/tm-syscall.c
+++ b/tools/testing/selftests/powerpc/tm/tm-syscall.c
@@ -77,13 +77,23 @@ pid_t getppid_tm(bool suspend)
 	exit(-1);
 }
 
+static inline bool have_htm_nosc(void)
+{
+#ifdef PPC_FEATURE2_HTM_NOSC
+	return ((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM_NOSC);
+#else
+	printf("PPC_FEATURE2_HTM_NOSC not defined, can't check AT_HWCAP2\n");
+	return false;
+#endif
+}
+
 int tm_syscall(void)
 {
 	unsigned count = 0;
 	struct timeval end, now;
 
-	SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2)
-		  & PPC_FEATURE2_HTM_NOSC));
+	SKIP_IF(!have_htm_nosc());
+
 	setbuf(stdout, NULL);
 
 	printf("Testing transactional syscalls for %d seconds...\n", TEST_DURATION);