[FFmpeg-cvslog] checkasm: Silence warnings about unused return value from read()

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Wed May 25 10:27:37 2022 +0300| [5cdf4c0beda54c8fa5da7914c05b9ee28332c9b5] | committer: Martin Storsjö

checkasm: Silence warnings about unused return value from read()

This codepath is enabled by default on arm, if the linux perf API
is available, unless disabled with --disable-linux-perf.

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5cdf4c0beda54c8fa5da7914c05b9ee28332c9b5
---

 tests/checkasm/checkasm.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/checkasm/checkasm.h b/tests/checkasm/checkasm.h
index b601a98754..d7645d3730 100644
--- a/tests/checkasm/checkasm.h
+++ b/tests/checkasm/checkasm.h
@@ -230,8 +230,10 @@ typedef struct CheckasmPerf {
     ioctl(sysfd, PERF_EVENT_IOC_ENABLE, 0);             \
 } while (0)
 #define PERF_STOP(t) do {                               \
+    int ret;                                            \
     ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0);            \
-    read(sysfd, &t, sizeof(t));                         \
+    ret = read(sysfd, &t, sizeof(t));                   \
+    (void)ret;                                          \
 } while (0)
 #elif CONFIG_MACOS_KPERF
 #define PERF_START(t) t = ff_kperf_cycles()