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-rw-r--r--Documentation/security/Smack.txt3
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diff --git a/Documentation/security/Smack.txt b/Documentation/security/Smack.txt
index a416479b8a1c..e68536d85680 100644
--- a/Documentation/security/Smack.txt
+++ b/Documentation/security/Smack.txt
@@ -194,6 +194,9 @@ onlycap
these capabilities are effective at for processes with any
label. The value is set by writing the desired label to the
file or cleared by writing "-" to the file.
+revoke-subject
+ Writing a Smack label here sets the access to '-' for all access
+ rules with that subject label.
You can add access rules in /etc/smack/accesses. They take the form: