Updated Documentation/core-api/kernel-api.rst to include `cpumask.h`,
providing better reference for CPU mask operations in the kernel API.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 Documentation/core-api/kernel-api.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/core-api/kernel-api.rst b/Documentation/core-api/kernel-api.rst
index ae92a2571388..5817632381f9 100644
--- a/Documentation/core-api/kernel-api.rst
+++ b/Documentation/core-api/kernel-api.rst
@@ -90,6 +90,12 @@ Bitmap Operations
 .. kernel-doc:: include/linux/bitmap.h
    :internal:
 
+Cpumask Operations
+------------------
+
+.. kernel-doc:: include/linux/cpumask.h
+   :internal:
+
 Command-line Parsing
 --------------------
 
-- 
2.31.1.272.g89b43f80a514