[PATCH] doc: Update recent SRCU API additions to whatisRCU.rst

[Zqiang]

The commit 'dab06d6f9379 ("srcutree: Add an atomic Tree SRCU")'
introduces some new APIs:

srcu_read_lock_atomic
srcu_read_unlock_atomic
synchronize_srcu_atomic
DEFINE_SRCU_ATOMIC
DEFINE_STATIC_SRCU_ATOMIC
init_srcu_struct_atomic

This commit therefore update thems to whatisRCU.rst.

Signed-off-by: Zqiang <qiang.zhang@xxxxxxxxx>
---
 Documentation/RCU/whatisRCU.rst | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/RCU/whatisRCU.rst b/Documentation/RCU/whatisRCU.rst
index e6767baff2d3..75c50f2f6d79 100644
--- a/Documentation/RCU/whatisRCU.rst
+++ b/Documentation/RCU/whatisRCU.rst
@@ -1209,11 +1209,13 @@ SRCU::
 	srcu_read_lock_nmisafe		start_poll_synchronize_srcu
 	srcu_read_unlock_nmisafe	start_poll_synchronize_srcu_expedited
 	srcu_read_lock_notrace		poll_state_synchronize_srcu
-	srcu_read_unlock_notrace
+	srcu_read_unlock_notrace	synchronize_srcu_atomic
 	srcu_down_read
 	srcu_up_read
 	srcu_down_read_fast
 	srcu_up_read_fast
+	srcu_read_lock_atomic
+	srcu_read_unlock_atomic
 	guard(srcu)()
 	scoped_guard(srcu)
 	srcu_read_lock_held
@@ -1229,8 +1231,11 @@ SRCU: Initialization/cleanup/ordering::
 	DEFINE_STATIC_SRCU
 	DEFINE_SRCU_FAST        // for srcu_read_lock_fast() and friends
 	DEFINE_STATIC_SRCU_FAST // for srcu_read_lock_fast() and friends
+	DEFINE_SRCU_ATOMIC
+	DEFINE_STATIC_SRCU_ATOMIC
 	init_srcu_struct
 	init_srcu_struct_fast
+	init_srcu_struct_atomic
 	cleanup_srcu_struct
 	smp_mb__after_srcu_read_unlock
 
-- 
2.17.1