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67fdba958c
dahdi-linux/drivers/dahdi
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Shaun Ruffell 67fdba958c dahdi: Channels can have their own file_operations structure. 
If we know that an open file is associated with a channel (pseudo or
real) we can just update the file->f_ops pointer so that we can short
circuit some of the checks in read/write/poll. Trades sizeof(file_operations)
bytes for less function call overhead in the "hot" path.

On a 2.4 GHz Xeon, saves around 150 ns on each read / write.

Review: https://reviewboard.asterisk.org/r/905/

Signed-off-by: Shaun Ruffell <sruffell@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9386 a0bf4364-ded3-4de4-8d8a-66a801d63aff
2010-09-20 20:34:44 +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 vpmadt032: Remove potential endless waits when resetting. 2010-09-16 18:57:39 +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 wct4xxp: Put two DMA messages behind debug flag. 2010-09-14 02:20:49 +00:00
wctc4xxp wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
wctdm24xxp wctdm24xxp: Minor spacing change on module parameter descriptions. 2010-09-01 15:46:25 +00:00
wcte12xp wcte12xp: Remove unused 'dtmfactive', 'dtmfmask', and 'dtmfmutemask' members. 2010-09-20 18:54:47 +00:00
xpp wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +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 wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_dynamic_ethmf.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_dynamic_loc.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +00:00
dahdi_dynamic.c wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +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 dahdi, dahdi_transcode: Remove mmap interface. 2010-09-01 15:46:25 +00:00
dahdi-base.c dahdi: Channels can have their own file_operations structure. 2010-09-20 20:34:44 +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 wct4xxp: Moving the transmit short detection behind debug module param. 2010-08-27 21:59:27 +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