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Documentation: devicetree: changesets do locking on their own meanwhile 

Since commit 183223770a ("drivers/of: Export OF changeset functions"),
the mentioned functions do all necessary locking.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Fixes: 183223770a ("drivers/of: Export OF changeset functions")
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Wolfram Sang 2016-08-24 15:38:56 +02:00 committed by Rob Herring
parent fa8410b355
commit 63b77d6d5a
1 changed files with 5 additions and 14 deletions
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19
Documentation/devicetree/changesets.txt
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@ -21,20 +21,11 @@ a set of changes. No changes to the active tree are made at this point.
All the change operations are recorded in the of_changeset 'entries' All the change operations are recorded in the of_changeset 'entries'
list. list.
3. mutex_lock(of_mutex) - starts a changeset; The global of_mutex 3. of_changeset_apply() - Apply the changes to the tree. Either the
ensures there can only be one editor at a time.
4. of_changeset_apply() - Apply the changes to the tree. Either the
entire changeset will get applied, or if there is an error the tree will entire changeset will get applied, or if there is an error the tree will
be restored to the previous state be restored to the previous state. The core ensures proper serialization
through locking. An unlocked version __of_changeset_apply is available,
5. mutex_unlock(of_mutex) - All operations complete, release the mutex if needed.
If a successfully applied changeset needs to be removed, it can be done If a successfully applied changeset needs to be removed, it can be done
with the following sequence. with of_changeset_revert().
1. mutex_lock(of_mutex)
2. of_changeset_revert()
3. mutex_unlock(of_mutex)