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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:27 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:19 +1100 |
| commit | 621e155a3591962420eacdd39f6f0aa29ceb221e (patch) | |
| tree | 387a9fb396f1bf24514b712c294182e36ba51076 /Documentation/filesystems/Locking | |
| parent | fb2d5b86aff355a27ebfc132d3c99f4a940cc3fe (diff) | |
| download | linux-621e155a3591962420eacdd39f6f0aa29ceb221e.tar.gz linux-621e155a3591962420eacdd39f6f0aa29ceb221e.tar.bz2 linux-621e155a3591962420eacdd39f6f0aa29ceb221e.zip | |
fs: change d_compare for rcu-walk
Change d_compare so it may be called from lock-free RCU lookups. This
does put significant restrictions on what may be done from the callback,
however there don't seem to have been any problems with in-tree fses.
If some strange use case pops up that _really_ cannot cope with the
rcu-walk rules, we can just add new rcu-unaware callbacks, which would
cause name lookup to drop out of rcu-walk mode.
For in-tree filesystems, this is just a mechanical change.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'Documentation/filesystems/Locking')
| -rw-r--r-- | Documentation/filesystems/Locking | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index 33fa3e5d38fd..9a76f8d8bf95 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -11,7 +11,9 @@ be able to use diff(1). prototypes: int (*d_revalidate)(struct dentry *, int); int (*d_hash) (struct dentry *, struct qstr *); - int (*d_compare) (struct dentry *, struct qstr *, struct qstr *); + int (*d_compare)(const struct dentry *, const struct inode *, + const struct dentry *, const struct inode *, + unsigned int, const char *, const struct qstr *); int (*d_delete)(struct dentry *); void (*d_release)(struct dentry *); void (*d_iput)(struct dentry *, struct inode *); |