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| author | David M. Richter <richterd@citi.umich.edu> | 2008-04-23 16:29:00 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2008-04-25 12:58:22 -0400 |
| commit | 288b2fd8251cb0bcb14b8a93755ef9c78de70e0f (patch) | |
| tree | 65ab67c528ad063f8e2103e1bb916bcb6981bd66 /fs/locks.c | |
| parent | 5fcc60c3a05bf417229fba715e7aec52bf6717fb (diff) | |
| download | lwn-288b2fd8251cb0bcb14b8a93755ef9c78de70e0f.tar.gz lwn-288b2fd8251cb0bcb14b8a93755ef9c78de70e0f.zip | |
leases: when unlocking, skip locking-related steps
In generic_setlease(), we don't need to allocate a new struct file_lock
or check for readers or writers when called with F_UNLCK.
Signed-off-by: David M. Richter <richterd@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/locks.c')
| -rw-r--r-- | fs/locks.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/fs/locks.c b/fs/locks.c index b9f3a0bed300..da1d0ddb4abd 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1367,18 +1367,20 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) lease = *flp; - error = -EAGAIN; - if ((arg == F_RDLCK) && (atomic_read(&inode->i_writecount) > 0)) - goto out; - if ((arg == F_WRLCK) - && ((atomic_read(&dentry->d_count) > 1) - || (atomic_read(&inode->i_count) > 1))) - goto out; + if (arg != F_UNLCK) { + error = -EAGAIN; + if ((arg == F_RDLCK) && (atomic_read(&inode->i_writecount) > 0)) + goto out; + if ((arg == F_WRLCK) + && ((atomic_read(&dentry->d_count) > 1) + || (atomic_read(&inode->i_count) > 1))) + goto out; - error = -ENOMEM; - new_fl = locks_alloc_lock(); - if (new_fl == NULL) - goto out; + error = -ENOMEM; + new_fl = locks_alloc_lock(); + if (new_fl == NULL) + goto out; + } /* * At this point, we know that if there is an exclusive |