futex: futex_wait_requeue_pi commentary corrections

From: Darren Hart <redacted>

The state machine described in the comments wasn't updated with a follow-on
fix.  Address that and cleanup the corresponding commentary in the 
function.

Signed-off-by: Darren Hart <redacted>
Cc: Thomas Gleixner <redacted>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <redacted>
---

kernel/futex.c |   23 ++++++++++-------------
1 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 0672ff8..18752ae 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c

@@ -2102,11 +2102,11 @@ int handle_early_requeue_pi_wakeup(struct 

futex_hash_bucket *hb,
 * We call schedule in futex_wait_queue_me() when we enqueue and return 
there
 * via the following:
 * 1) wakeup on uaddr2 after an atomic lock acquisition by futex_requeue()
- * 2) wakeup on uaddr2 after a requeue and subsequent unlock
- * 3) signal (before or after requeue)
- * 4) timeout (before or after requeue)
+ * 2) wakeup on uaddr2 after a requeue
+ * 3) signal
+ * 4) timeout
 *
- * If 3, we setup a restart_block with futex_wait_requeue_pi() as the 
function.
+ * If 3, we setup a restart_block and return -ERESTARTNOINTR.