thread-unsafety problems as spl*() ones are NOP

[Slawa Olhovchenkov]

On Sat, Jan 30, 2016 at 09:25:21PM +0300, Slawa Olhovchenkov wrote:

> On Sat, Jan 30, 2016 at 09:42:13PM +0330, mokhi wrote:
> 
> > i currently only wanna do patch on kbd.c (because i'm sure there is a
> > thread-unsafety)
> > and i don't want to add anything to spltty() nor splx(), i just wanna
> > add things under where they've been used.
> > isn't problem with using mutex/spin/lock/unlock etc there?
> 
> yes.
> currenly spltty act as mutex_lock(&spltty_mutex), like global lock for
> all used files. this is also inter-files lock, not only lock inside
> only kbd.c.
> you need patch all files. all using spltty need to remove
> simultaneously.
> 

oh, sorry.
i am see now all splXXX is nop.
may be incorretly -- for example, in digi.c i am don't see any lockind
instead spltty().