[PATCH v5 03/19] selftests/resctrl: Unmount resctrl FS if child fails to run benchmark

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A child calls PARENT_EXIT() when it fails to run a benchmark to kill
the parent process. PARENT_EXIT() lacks unmount for the resctrl FS and
the parent won't be there to unmount it either after it gets killed.

Add the resctrl FS unmount also to PARENT_EXIT().

Fixes: 591a6e8588fc ("selftests/resctrl: Add basic resctrl file system operations and data")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
 tools/testing/selftests/resctrl/resctrl.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 87e39456dee0..f455f0b7e314 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -43,6 +43,7 @@
 	do {					\
 		perror(err_msg);		\
 		kill(ppid, SIGKILL);		\
+		umount_resctrlfs();		\
 		exit(EXIT_FAILURE);		\
 	} while (0)
 
-- 
2.30.2




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