[PATCH 08/14] sysfs: Perform renames under sysfs_mutex

Tejun Heo teheo at suse.de
Tue Jul 31 04:10:59 PDT 2007

Tejun Heo wrote:
> Eric W. Biederman wrote:
>> This modifies sysfs_rename_dir to use sysfs_addrm_start/sysfs_addrm_finish
>> making it more like the rest of the sysfs directory manipulation functions.
>> This moves the entire rename operation inside of sysfs_mutex removing
>> the need to grab i_mutex, and incidentally this kills one s_dentry use.
>> Signed-off-by: Eric W. Biederman <ebiederm at xmission.com>
> Looks good.
> Acked-by: Tejun Heo <htejun at gmail.com>

Just one afterthought.  addrm_start/finish are basically used as wrapper
to lock both sysfs_mutex and i_mutex.  It might be better to just open
code them.  sysfs_move_dir() has to open code locking anyway and IMHO
it's better to keep rename and move look similar.



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