[PATCH] cgroup: Add documentation for missing zswap memory.stat

[Usama Arif]

This includes zswpin, zswpout and zswpwb.

Signed-off-by: Usama Arif <usamaarif642@xxxxxxxxx>
---
 Documentation/admin-guide/cgroup-v2.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 17e6e9565156..48ec54627814 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1454,6 +1454,15 @@ PAGE_SIZE multiple when read back.
 	  zswapped
 		Amount of application memory swapped out to zswap.
 
+	  zswpin
+		Number of pages moved in to memory from zswap.
+
+	  zswpout
+		Number of pages moved out of memory to zswap.
+
+	  zswpwb
+		Number of pages written from zswap to swap.
+
 	  file_mapped
 		Amount of cached filesystem data mapped with mmap()
 
-- 
2.43.0