[issue2148] DFBSD v2.13.0.38.g09a36 - Switch to TTY panic

[Antonio Huete Jimenez (via DragonFly issue tracker)]

Antonio Huete Jimenez <tuxillo at quantumachine.net> added the comment:

>From what I've seen in the syscons code, save_kbd_state() and update_kbd_state() 
are never called with the lock held.

Furthermore, in the console path functions, specifically in sccnputc() I've 
found this:


        scp->status &= ~SLKED;
#if 0
        /* This can block, illegal in the console path */
        update_kbd_state(scp, scp->status, SLKED);
#endif

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assignedto:  -> tuxillo

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<http://bugs.dragonflybsd.org/issue2148>
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