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-rw-r--r--Documentation/RCU/whatisRCU.txt5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt
index 8ed6c9f6133c..df62466da4e0 100644
--- a/Documentation/RCU/whatisRCU.txt
+++ b/Documentation/RCU/whatisRCU.txt
@@ -890,6 +890,8 @@ SRCU: Critical sections Grace period Barrier
srcu_read_lock_held
SRCU: Initialization/cleanup
+ DEFINE_SRCU
+ DEFINE_STATIC_SRCU
init_srcu_struct
cleanup_srcu_struct
@@ -913,7 +915,8 @@ a. Will readers need to block? If so, you need SRCU.
b. What about the -rt patchset? If readers would need to block
in an non-rt kernel, you need SRCU. If readers would block
in a -rt kernel, but not in a non-rt kernel, SRCU is not
- necessary.
+ necessary. (The -rt patchset turns spinlocks into sleeplocks,
+ hence this distinction.)
c. Do you need to treat NMI handlers, hardirq handlers,
and code segments with preemption disabled (whether