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-rw-r--r--Documentation/static-keys.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/static-keys.txt b/Documentation/static-keys.txt
index b83dfa1c0602..870b4be3cb11 100644
--- a/Documentation/static-keys.txt
+++ b/Documentation/static-keys.txt
@@ -149,6 +149,11 @@ static_branch_inc(), will change the branch back to true. Likewise, if the
key is initialized false, a 'static_branch_inc()', will change the branch to
true. And then a 'static_branch_dec()', will again make the branch false.
+The state and the reference count can be retrieved with 'static_key_enabled()'
+and 'static_key_count()'. In general, if you use these functions, they
+should be protected with the same mutex used around the enable/disable
+or increment/decrement function.
+
Where an array of keys is required, it can be defined as::
DEFINE_STATIC_KEY_ARRAY_TRUE(keys, count);