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doc/RCU/listRCU: Update example function name 

listRCU.rst document gives an example with 'ipc_lock()', but the
function has dropped off by commit 82061c57ce ("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.

Reviewed-by: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com>
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
SeongJae Park 2020-01-06 21:07:58 +01:00 committed by Paul E. McKenney
parent c50a871409
commit 3282b04692
1 changed files with 3 additions and 3 deletions
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Documentation/RCU/listRCU.rst
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@ -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. additional RCU-induced staleness is generally not a problem.
However, there are many examples where stale data cannot be tolerated. 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() One example in the Linux kernel is the System V IPC (see the shm_lock()
function in ipc/util.c). This code checks a *deleted* flag under a 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 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 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: .. _quick_quiz: