cvs commit: src/sys/dev/fxp if_fxp.c if_fxpvar.h

[Nate Lawson]

On Fri, 25 Apr 2003, Nate Lawson wrote:
> njl         2003/04/25 02:01:54 PDT
> 
>   Modified files:
>     sys/dev/fxp          if_fxp.c if_fxpvar.h 
>   Log:
>   Make fxp(4) INTR_MPSAFE (but do not enable MPSAFE just yet):

As the comment in the code says, MPSAFE is not enabled because ifnet is
not locked yet.  I was informed of this by hsu at .  However, the driver was
very stable for me (no crashes or increased packet loss) so I am
committing this code so others can test it.  If you do enable MPSAFE, be
aware of potential data loss or crashes.

For developers, note that the locking in the code path only protects the
various fxp routines (fxp_start, fxp_intr, fxp_tick, ...) and is not
intended to serialize access to ANY external structures.  This is how it
should be.  Please do not copy the exact approach taken here for a little
while until ifnet locking is finished as there may need to be some changes
made to this model.

-Nate