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| author | Tejun Heo <tj@kernel.org> | 2014-02-03 14:02:59 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-07 15:42:40 -0800 |
| commit | 182fd64b66342219d6fcf2b84d337529d120d95c (patch) | |
| tree | f8e0377fa5cdf90ea11245fd4f028c07ada4a5cd /include/linux/kernfs.h | |
| parent | 988cd7afb3f37598891ca70b4c6eb914c338c46a (diff) | |
| download | op-kernel-dev-182fd64b66342219d6fcf2b84d337529d120d95c.zip op-kernel-dev-182fd64b66342219d6fcf2b84d337529d120d95c.tar.gz | |
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.
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.
v2: Refreshed on top of ("kernfs: make kernfs_deactivate() honor
KERNFS_LOCKDEP flag"). As the earlier patch already added
KERNFS_LOCKDEP tests to kernfs_deactivate(), those additions are
dropped from this patch and the existing ones are simply converted
to kernfs_lockdep().
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/kernfs.h')
| -rw-r--r-- | include/linux/kernfs.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index 38646f6..dc4cd6c 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -35,7 +35,6 @@ enum kernfs_node_type { }; #define KERNFS_TYPE_MASK 0x000f -#define KERNFS_ACTIVE_REF KERNFS_FILE #define KERNFS_FLAG_MASK ~KERNFS_TYPE_MASK enum kernfs_node_flag { |
