On Fri, Feb 07, 2014 at 09:47:01PM +0200, Imre Deak wrote: > We skip lockdep annotations for sysfs attributes with ignore_lockdep > set. An exception is kernfs_deactivate where we annotate even in this > case. Since the lockdep map key needed for the annotation is not > initialized whenever ignore_lockdep is set, we'll get a warning for > the uninitialized key. > > Note that this happens since, > > commit 517e64f57883bd63c5a4ab8b3d0d3ed68c55d0cf > Author: Tejun Heo <[email protected]> > Date: Thu Nov 28 14:54:29 2013 -0500 > > Before this change we had a valid key even in case of ignore_lockdep, so > the annotation in kernfs_deactivate worked, or at least didn't produce > the above warning. Fix this by skipping the annotation whenever > ignore_lockdep is set. > > The actual attribute triggering the bug was 'delete_device' in > drivers/i2c/i2c-core.c, for the backtrace see the reference below.
I think Greg already has about the same patch queued. http://lkml.kernel.org/g/[email protected] Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
