Messages in this thread | | | Date | Mon, 20 Jan 2014 19:54:01 +0100 | From | Oleg Nesterov <> | Subject | Re: [PATCH 0/5] lockdep: (Was: check && lockdep_no_validate) |
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On 01/20, Alan Stern wrote: > > On Mon, 20 Jan 2014, Oleg Nesterov wrote: > > > On 01/17, Alan Stern wrote: > > > > > > Also, take a look at commit 356c05d58af0. It's a similar situation > > > (not exactly the same). > > > > At first glance, can't __ATTR_IGNORE_LOCKDEP() use no_validate too ? > > (ignoring the fact checkpatch.pl won't be happy). This can simplify > > the code, it seems. > > Well, the macro itself doesn't specify the lockdep class. That happens > implicitly in sysfs_get_active(), in the call to rwsem_acquire_read(). > However, it ought to be possible to change the code so that when > ignore_lockdep(sd) returns nonzero, we end up using no_validate.
sysfs_dirent_init_lockdep() can check ->ignore_lockdep and do lockdep_set_novalidate_class(). This way sysfs_ignore_lockdep() can go away.
I guess we could even change __ATTR_IGNORE_LOCKDEP() to initialize ->key = __lockdep_no_validate__ and kill ->ignore_lockdep.
Oleg.
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