[PATCH] trace-cmd: Fix trace_tsc2nsec_is_supported() on !x86

From: Nicolas Saenz Julienne <nsaenzju@redhat.com>
To: linux-trace-devel@vger.kernel.org
Cc: tz.stoyanov@gmail.com, rostedt@goodmis.org,
	Nicolas Saenz Julienne <nsaenzju@redhat.com>
Subject: [PATCH] trace-cmd: Fix trace_tsc2nsec_is_supported() on !x86
Date: Tue, 16 Nov 2021 20:21:52 +0100	[thread overview]
Message-ID: <20211116192152.1360993-1-nsaenzju@redhat.com> (raw)

'trace-cmd list -C' outputs 'tsc2nsec' on my arm64 machine. TSC is an
x86 specific counter, so it shouldn't be supported. Fix this by making
sure TSC exists as a trace clock in trace_tsc2nsec_is_supported().

Signed-off-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
---
 tracecmd/trace-record.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index 1767a6c..78e9566 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -6122,6 +6122,9 @@ static int get_tsc_nsec(int *shift, int *mult)
 
 bool trace_tsc2nsec_is_supported(void)
 {
+	if (!clock_is_supported(NULL, TSC_CLOCK))
+		return false;
+
 	return get_tsc_nsec(NULL, NULL) == 0;
 }
 
-- 
2.33.1

