CVS commit: src/sys

["Ryota Ozaki" <ozaki-r%netbsd.org@localhost>]

Module Name:    src
Committed By:   ozaki-r
Date:           Wed Dec 28 07:32:16 UTC 2016

Modified Files:
        src/sys/arch/x86/pci: if_vmx.c
        src/sys/dev/pci: if_vioif.c if_wm.c
        src/sys/net: if_ether.h if_ethersubr.c

Log Message:
Protect ec_multi* with mutex

The data can be accessed from sysctl, ioctl, interface watchdog
(if_slowtimo) and interrupt handlers. We need to protect the data against
parallel accesses from them.

Currently the mutex is applied to some drivers, we need to apply it to all
drivers in the future.

Note that the mutex is adaptive one for ease of implementation but some
drivers access the data in interrupt context so we cannot apply the mutex
to every drivers as is. We have two options: one is to replace the mutex
with a spin one, which requires some additional works (see
ether_multicast_sysctl), and the other is to modify the drivers to access
the data not in interrupt context somehow.


To generate a diff of this commit:
cvs rdiff -u -r1.14 -r1.15 src/sys/arch/x86/pci/if_vmx.c
cvs rdiff -u -r1.29 -r1.30 src/sys/dev/pci/if_vioif.c
cvs rdiff -u -r1.459 -r1.460 src/sys/dev/pci/if_wm.c
cvs rdiff -u -r1.65 -r1.66 src/sys/net/if_ether.h
cvs rdiff -u -r1.230 -r1.231 src/sys/net/if_ethersubr.c

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