On Tue, 2010-03-16 at 13:56 +0000, James Simmons wrote: > > > The fb_ops can only be called from fbcon or the fbdev userland interface. > > > The fbcon calls should only happen when the VC is in KD_TEXT mode. Now > > > with the DRM backend we have the advantage of creating a mapping seperate > > > from the console mapping. A fb_open/fb_close could be used to cleaning up > > > the userland mmap as well as handle the console pinning. We can supply > > > your own fb_mmap hook. > > > > Again, the issue is not userspace but that fb_ops hooks can be called > > from interrupt context etc. > > This should not happen. The VT layer is protected from calling in the > interrupt context. TNor does fbcon call any fb_ops methods from a irq.
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