--- zzzz-none-000/linux-3.10.107/Documentation/vm/cleancache.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/vm/cleancache.txt	2021-02-04 17:41:59.000000000 +0000
@@ -28,9 +28,7 @@
 A cleancache "backend" that provides transcendent memory registers itself
 to the kernel's cleancache "frontend" by calling cleancache_register_ops,
 passing a pointer to a cleancache_ops structure with funcs set appropriately.
-Note that cleancache_register_ops returns the previous settings so that
-chaining can be performed if desired. The functions provided must conform to
-certain semantics as follows:
+The functions provided must conform to certain semantics as follows:
 
 Most important, cleancache is "ephemeral".  Pages which are copied into
 cleancache have an indefinite lifetime which is completely unknowable
@@ -85,7 +83,7 @@
 CLEANCACHE PERFORMANCE METRICS
 
 If properly configured, monitoring of cleancache is done via debugfs in
-the /sys/kernel/debug/mm/cleancache directory.  The effectiveness of cleancache
+the /sys/kernel/debug/cleancache directory.  The effectiveness of cleancache
 can be measured (across all filesystems) with:
 
 succ_gets	- number of gets that were successful