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| author | Tejun Heo <tj@kernel.org> | 2014-01-10 14:57:20 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-10 22:44:25 +0100 |
| commit | a69d001cfc712b96ec9d7ba44d6285702a38dabf (patch) | |
| tree | 295a4f2c57a883d45596078a28278cb054bf9a02 /fs/sysfs | |
| parent | kernfs: replace kernfs_node->u.completion with kernfs_root->deactivate_waitq (diff) | |
| download | linux-a69d001cfc712b96ec9d7ba44d6285702a38dabf.tar.xz linux-a69d001cfc712b96ec9d7ba44d6285702a38dabf.zip | |
kernfs: remove KERNFS_ACTIVE_REF and add kernfs_lockdep()
There currently are two mechanisms gating active ref lockdep
annotations - KERNFS_LOCKDEP flag and KERNFS_ACTIVE_REF type mask.
The former disables lockdep annotations in kernfs_get/put_active()
while the latter disables all of kernfs_deactivate().
While KERNFS_ACTIVE_REF also behaves as an optimization to skip the
deactivation step for non-file nodes, the benefit is marginal and it
needlessly diverges code paths. Let's drop KERNFS_ACTIVE_REF and use
KERNFS_LOCKDEP in kernfs_deactivate() too.
While at it, add a test helper kernfs_lockdep() to test KERNFS_LOCKDEP
flag so that it's more convenient and the related code can be compiled
out when not enabled.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs')
0 files changed, 0 insertions, 0 deletions