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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-08-24 15:38:56 +0200 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2016-08-31 00:07:44 +0200 |
| commit | 63b77d6d5a2dad95a9fe0c0459f10f632ae70248 (patch) | |
| tree | 0292101ad1c8dcaca0c70fc9ec8f38f18ff5f2df /Documentation/devicetree/changesets.txt | |
| parent | Linux 4.8-rc3 (diff) | |
| download | linux-63b77d6d5a2dad95a9fe0c0459f10f632ae70248.tar.xz linux-63b77d6d5a2dad95a9fe0c0459f10f632ae70248.zip | |
Documentation: devicetree: changesets do locking on their own meanwhile
Since commit 183223770ae862 ("drivers/of: Export OF changeset functions"),
the mentioned functions do all necessary locking.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Fixes: 183223770ae862 ("drivers/of: Export OF changeset functions")
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'Documentation/devicetree/changesets.txt')
| -rw-r--r-- | Documentation/devicetree/changesets.txt | 19 |
1 files changed, 5 insertions, 14 deletions
diff --git a/Documentation/devicetree/changesets.txt b/Documentation/devicetree/changesets.txt index 935ba5acc34e..cb488eeb6353 100644 --- a/Documentation/devicetree/changesets.txt +++ b/Documentation/devicetree/changesets.txt @@ -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' list. -3. mutex_lock(of_mutex) - starts a changeset; The global of_mutex -ensures there can only be one editor at a time. - -4. of_changeset_apply() - Apply the changes to the tree. Either the +3. 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 -be restored to the previous state - -5. mutex_unlock(of_mutex) - All operations complete, release the mutex +be restored to the previous state. The core ensures proper serialization +through locking. An unlocked version __of_changeset_apply is available, +if needed. If a successfully applied changeset needs to be removed, it can be done -with the following sequence. - -1. mutex_lock(of_mutex) - -2. of_changeset_revert() - -3. mutex_unlock(of_mutex) +with of_changeset_revert(). |