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1c462653e7
dahdi-linux/drivers/dahdi
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Shaun Ruffell 1c462653e7 dahdi: Remove bigzaplock by converting chan_lock to spinlock_t. 
The bigzaplock was used to prevent changes to all the channels during
masterspan processing while conference parameters were changing.  The
master span processing also took a global lock out on the chan_lock to
prevent new channels from being registered or unregistered during
processing.  Instead of grabbing both those locks, just changing the
semantics of chan_lock to those of bigzaplock seems to fit the bill and
removes another lock from the driver (and saves ~10 ns on a 2.40 GHz
Xeon in prcocess_masterspan)

chan_lock is a candidate for conversion to RCU but usage in conferencing
(bigzaplock type usage) needs to be audited carefully before conversion.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
Acked-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Review: https://reviewboard.asterisk.org/r/940/

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9414 a0bf4364-ded3-4de4-8d8a-66a801d63aff
2010-09-24 22:45:07 +00:00
..
datamods wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
firmware wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
hpec wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
oct612x wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
voicebus wcte12xp, wctdm24xxp: Convert vbb cache from kmem_cache to dma_pool. 2010-09-23 21:38:52 +00:00
vpmadt032_loader wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wcb4xxp wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wct4xxp Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
wctc4xxp wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wctdm24xxp wcte12xp, wctdm24xxp: Convert vbb cache from kmem_cache to dma_pool. 2010-09-23 21:38:52 +00:00
wcte12xp Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
xpp Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
adt_lec.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
adt_lec.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
arith.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
biquad.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_dummy.c dahdi_dummy: #include <linux/slab.h> for kzalloc and friends. 2010-09-07 13:47:24 +00:00
dahdi_dynamic_eth.c Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
dahdi_dynamic_ethmf.c Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
dahdi_dynamic_loc.c Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
dahdi_dynamic.c Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
dahdi_echocan_jpah.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_echocan_kb1.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_echocan_mg2.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_echocan_oslec.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_echocan_sec2.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_echocan_sec.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_transcode.c Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
dahdi-base.c dahdi: Remove bigzaplock by converting chan_lock to spinlock_t. 2010-09-24 22:45:07 +00:00
digits.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
ecdis.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
fir.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
fxo_modes.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
Kbuild wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
Kconfig wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
Makefile wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
makefw.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
pciradio.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
pciradio.rbt wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
proslic.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
tor2-hw.h wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
tor2.c Move test for DEFINE_SPINLOCK into include/dahdi/kernel.h 2010-09-24 22:44:53 +00:00
tormenta2.rbt wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wcfxo.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wct1xxp.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wctdm.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wcte11xp.c wcte11xp, wcte12xp: Fix a long-standing issue with shutdown 2010-09-10 15:54:35 +00:00