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CVS commit: src/sys

Module Name:    src
Committed By:   ozaki-r
Date:           Tue Jul  1 10:16:02 UTC 2014

Modified Files:
        src/sys/altq: if_altq.h
        src/sys/net: if.c if.h

Log Message:
Lock IFQ operations when NET_MPSAFE

- Introduce NET_MPSAFE
  - not defined by default
- Add ifq_lock to protect ifnet#if_snd
- Initialize ifq_lock and lock IFQ operations

When NET_MPSAFE isn't defined, this modification
doesn't change its behavior and adds trivial
performance overheads.

Discussed with matt@ on tech-net

To generate a diff of this commit:
cvs rdiff -u -r1.13 -r1.14 src/sys/altq/if_altq.h
cvs rdiff -u -r1.284 -r1.285 src/sys/net/if.c
cvs rdiff -u -r1.168 -r1.169 src/sys/net/if.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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