[PATCH] Documentation: Update kselftest.txt

[Wang Long]

Add document for how to install selftests.

Signed-off-by: Wang Long <long.wanglong@xxxxxxxxxx>
---
 Documentation/kselftest.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/kselftest.txt b/Documentation/kselftest.txt
index a87d840..9bbbcdc 100644
--- a/Documentation/kselftest.txt
+++ b/Documentation/kselftest.txt
@@ -54,6 +54,22 @@ To run the hotplug tests:
 - note that some tests will require root privileges.
 
 
+Install selftests
+=================
+
+You can use kselftest_install.sh tool installs selftests in default
+location which is tools/testing/selftests/kselftest or an user specified
+location.
+
+To install selftests in default location:
+   $ cd tools/testing/selftests
+   $ ./kselftest_install.sh
+
+To install selftests in an user specified location:
+   $ cd tools/testing/selftests
+   $ ./kselftest_install.sh install_dir
+
+
 Contributing new tests
 ======================
 
-- 
1.8.3.4

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