1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/RCU/NMI-RCU.txt b/Documentation/RCU/NMI-RCU.txt
index c64158ecde43..a6d32e65d222 100644
--- a/Documentation/RCU/NMI-RCU.txt
+++ b/Documentation/RCU/NMI-RCU.txt
@@ -93,6 +93,9 @@ Since NMI handlers disable preemption, synchronize_sched() is guaranteed
 not to return until all ongoing NMI handlers exit.  It is therefore safe
 to free up the handler's data as soon as synchronize_sched() returns.
+Important note: for this to work, the architecture in question must
+invoke irq_enter() and irq_exit() on NMI entry and exit, respectively.
 Answer to Quick Quiz

diff --git a/Documentation/RCU/NMI-RCU.txt b/Documentation/RCU/NMI-RCU.txt index c64158ecde43..a6d32e65d222 100644 --- a/Documentation/RCU/NMI-RCU.txt +++ b/Documentation/RCU/NMI-RCU.txt
@@ -93,6 +93,9 @@ Since NMI handlers disable preemption, synchronize_sched() is guaranteed
93	not to return until all ongoing NMI handlers exit. It is therefore safe	93	not to return until all ongoing NMI handlers exit. It is therefore safe
94	to free up the handler's data as soon as synchronize_sched() returns.	94	to free up the handler's data as soon as synchronize_sched() returns.
95		95
		96	Important note: for this to work, the architecture in question must
		97	invoke irq_enter() and irq_exit() on NMI entry and exit, respectively.
		98
96		99
97	Answer to Quick Quiz	100	Answer to Quick Quiz
98		101