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authorTejun Heo <htejun@gmail.com>2007-06-13 14:45:15 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-11 19:09:04 -0400
commitaecdcedaab49ca40620dc7dd70f67ee7269a66c9 (patch)
treedf1faa0302e6fb428b7ae0a14d443626fd73b121 /fs/sysfs/sysfs.h
parent3e5190380ebef77f2b015c9e7a4ca225a3d75021 (diff)
sysfs: implement kobj_sysfs_assoc_lock
kobj->dentry can go away anytime unless the user controls when the associated sysfs node is deleted. This patch implements kobj_sysfs_assoc_lock which protects kobj->dentry. This will be used to maintain kobj based API when converting sysfs to use sysfs_dirent tree instead of dentry/kobject. Note that this lock belongs to kobject/driver-model not sysfs. Once sysfs is converted to not use kobject in its interface, this can be removed from sysfs. This is in preparation of object reference simplification. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/sysfs/sysfs.h')
-rw-r--r--fs/sysfs/sysfs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 39ab0481379c..718e2e123fae 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -62,6 +62,7 @@ extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
62extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); 62extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
63 63
64extern spinlock_t sysfs_lock; 64extern spinlock_t sysfs_lock;
65extern spinlock_t kobj_sysfs_assoc_lock;
65extern struct rw_semaphore sysfs_rename_sem; 66extern struct rw_semaphore sysfs_rename_sem;
66extern struct super_block * sysfs_sb; 67extern struct super_block * sysfs_sb;
67extern const struct file_operations sysfs_dir_operations; 68extern const struct file_operations sysfs_dir_operations;