check_resctrlfs_support() does the following
1. Checks if the platform supports resctrl file system or not by looking
for resctrl in /proc/filesystems
2. Calls opendir() on default resctrl file system path
(i.e. /sys/fs/resctrl)
3. Checks if resctrl file system is mounted or not by looking at
/proc/mounts
Steps 2 and 3 will fail if the platform does not support resctrl file
system. So, there is no need to check for them if step 1 fails.
Fix this by returning immediately if the platform does not support
resctrl file system.
Signed-off-by: Fenghua Yu <fenghua...@intel.com>
---
tools/testing/selftests/resctrl/resctrlfs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/testing/selftests/resctrl/resctrlfs.c
b/tools/testing/selftests/resctrl/resctrlfs.c
index 2c574d143ff0..c676557b376d 100644
--- a/tools/testing/selftests/resctrl/resctrlfs.c
+++ b/tools/testing/selftests/resctrl/resctrlfs.c
@@ -579,6 +579,9 @@ bool check_resctrlfs_support(void)
printf("%sok kernel supports resctrl filesystem\n", ret ? "" : "not ");
tests_run++;
+ if (!ret)
+ return ret;
+
dp = opendir(RESCTRL_PATH);
printf("%sok resctrl mountpoint \"%s\" exists\n",
dp ? "" : "not ", RESCTRL_PATH);
--
2.29.2
