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authorTejun Heo <htejun@gmail.com>2007-06-14 03:45:14 +0900
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-11 16:09:04 -0700
commit13b3086d2ea483cbcae5a4236446cecc082a72cf (patch)
treef6932aaf486a302aa7b03857d780bafda33db2d6 /.mailmap
parenta26cd7226c24c3be5dd5f48a74832fe64beb8489 (diff)
sysfs: add sysfs_dirent->s_parent
Add sysfs_dirent->s_parent. With this patch, each sd points to and holds a reference to its parent. This allows walking sysfs tree without referencing sd->s_dentry which can go away anytime if the user doesn't control when it's deleted. sd->s_parent is initialized and parent is referenced in sysfs_attach_dirent(). Reference to parent is released when the sd is released, so as long as reference to a sd is held, s_parent can be followed. dentry walk in sysfs_readdir() is convereted to s_parent walk. This will be used to reimplement symlink such that it uses only sysfs_dirent tree. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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