[PATCH 3/7] doc/RCU/listRCU: Update example function name

[sj38 . park]

From: SeongJae Park <sjpark@xxxxxxxxx>

listRCU.rst document gives an example with 'ipc_lock()', but the
function has dropped off by commit 82061c57ce93 ("ipc: drop
ipc_lock()").  Because the main logic of 'ipc_lock()' has melded in
'shm_lock()' by the commit, this commit updates the document to use
'shm_lock()' instead.

Signed-off-by: SeongJae Park <sjpark@xxxxxxxxx>
---
 Documentation/RCU/listRCU.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/RCU/listRCU.rst b/Documentation/RCU/listRCU.rst
index e768f56e8fa3..2a643e293fb4 100644
--- a/Documentation/RCU/listRCU.rst
+++ b/Documentation/RCU/listRCU.rst
@@ -286,11 +286,11 @@ time the external state changes before Linux becomes aware of the change,
 additional RCU-induced staleness is generally not a problem.
 
 However, there are many examples where stale data cannot be tolerated.
-One example in the Linux kernel is the System V IPC (see the ipc_lock()
-function in ipc/util.c).  This code checks a *deleted* flag under a
+One example in the Linux kernel is the System V IPC (see the shm_lock()
+function in ipc/shm.c).  This code checks a *deleted* flag under a
 per-entry spinlock, and, if the *deleted* flag is set, pretends that the
 entry does not exist.  For this to be helpful, the search function must
-return holding the per-entry lock, as ipc_lock() does in fact do.
+return holding the per-entry spinlock, as shm_lock() does in fact do.
 
 .. _quick_quiz:
 
-- 
2.17.1