[PATCH] Documentation: locking: fix references

[Alexander Aring <aahringo@redhat.com>]

This patch fixes file references from txt to rst file ending in
ww-mutex-design.rst and futex-requeue-pi.rst.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
---
Maybe there are more somewhere else in Documentation? However I caught
these ones in locking.

 Documentation/locking/futex-requeue-pi.rst | 2 +-
 Documentation/locking/ww-mutex-design.rst  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/locking/futex-requeue-pi.rst b/Documentation/locking/futex-requeue-pi.rst
index 14ab5787b9a7..27c7a2b8966f 100644
--- a/Documentation/locking/futex-requeue-pi.rst
+++ b/Documentation/locking/futex-requeue-pi.rst
@@ -5,7 +5,7 @@ Futex Requeue PI
 Requeueing of tasks from a non-PI futex to a PI futex requires
 special handling in order to ensure the underlying rt_mutex is never
 left without an owner if it has waiters; doing so would break the PI
-boosting logic [see rt-mutex-desgin.txt] For the purposes of
+boosting logic [see rt-mutex-desgin.rst] For the purposes of
 brevity, this action will be referred to as "requeue_pi" throughout
 this document.  Priority inheritance is abbreviated throughout as
 "PI".
diff --git a/Documentation/locking/ww-mutex-design.rst b/Documentation/locking/ww-mutex-design.rst
index 54d9c17bb66b..6a4d7319f8f0 100644
--- a/Documentation/locking/ww-mutex-design.rst
+++ b/Documentation/locking/ww-mutex-design.rst
@@ -2,7 +2,7 @@
 Wound/Wait Deadlock-Proof Mutex Design
 ======================================
 
-Please read mutex-design.txt first, as it applies to wait/wound mutexes too.
+Please read mutex-design.rst first, as it applies to wait/wound mutexes too.
 
 Motivation for WW-Mutexes
 -------------------------
-- 
2.27.0