Commit Graph

20 Commits

Author SHA1 Message Date
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00
Clemens Ladisch dbf91dd47d [ALSA] ES1938: remove duplicate field initialization
Remove the duplicate and inconsistent initialization of the kcontrol
access field.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2006-09-23 10:48:21 +02:00
Takashi Iwai 0b59397268 [ALSA] Add dB information to es1938 driver
Added the dB information to ESS Solo (es1938) driver.
The new compound dB range TLVs are used for non-linear native
volume controls.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2006-09-23 10:46:18 +02:00
Takashi Iwai f40b68903c [ALSA] Fix section mismatch errors in ALSA PCI drivers
Fixed 'section mismatch' errors in ALSA PCI drivers:
- removed invalid __devinitdata from pci id tables
- fix/remove __devinit of functions called in suspend/resume

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2006-07-12 20:08:01 +02:00
Thomas Gleixner 65ca68b300 [PATCH] irq-flags: sound: Use the new IRQF_ constants
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jaroslav Kysela <perex@suse.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-02 13:58:54 -07:00
Takashi Iwai 302e4c2f9e [ALSA] Change an arugment of snd_mpu401_uart_new() to bit flags
Change the 5th argument of snd_mpu401_uart_new() to bit flags
instead of a boolean.  The argument takes bits that consist of
MPU401_INFO_XXX flags.
The callers that used the value 1 there are replaced with
MPU401_INFO_INTEGRATED.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-06-22 21:33:56 +02:00
Henrik Kretzschmar 396c9b928d [ALSA] add __devinitdata to all pci_device_id
Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-27 21:10:34 +02:00
Matthias Gehre 910638ae7e [PATCH] Replace 0xff.. with correct DMA_xBIT_MASK
Replace all occurences of 0xff..  in calls to function pci_set_dma_mask()
and pci_set_consistant_dma_mask() with the corresponding DMA_xBIT_MASK from
linux/dma-mapping.h.

Signed-off-by: Matthias Gehre <M.Gehre@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-28 09:16:07 -08:00
Takashi Iwai b34a580ec5 [ALSA] es1938 - Fix PM support
Modules: ES1938 driver

Fix PM support on ES1938 driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-01-03 12:27:31 +01:00
Takashi Iwai e571f59436 [ALSA] Remove xxx_t typedefs: PCI ES1938
Modules: ES1938 driver

Remove xxx_t typedefs from the PCI ES1938 driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-01-03 12:19:33 +01:00
Takashi Iwai c3e6f7d876 [ALSA] Remove superfluous pcm_free callbacks
Remove superflous pcm_free callbacks.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-01-03 12:16:21 +01:00
Greg Kroah-Hartman 249bb070f5 [PATCH] PCI: removed unneeded .owner field from struct pci_driver
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-11-10 16:09:17 -08:00
Takashi Iwai 99b359ba10 [ALSA] Add missing KERN_* suffix to printk
Add missing KERN_* suffix to printk.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-04 13:19:23 +01:00
Takashi Iwai 93b9f42637 [ALSA] es1938 - Clean up and fix trigger in PM
Modules: ES1938 driver

- Clean up the last PM fix
- Add TRIGGER_SUSPEND/RESUME to disable/enable DMA properly during PM

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-04 13:18:23 +01:00
Rudolf Marek c913f69b0d [ALSA] es1938 - Fix resume
Modules: ES1938 driver

This patch fixes the suspend/resume issue I'm having with ESS-Solo1
soundcard. Without this patch I might get after resume message
that kernel is disabling the IRQ5 (soundcard). If there was something
playing it wont continue after resume without this patch.

Signed-off-by: Rudolf Marek <r.marek@sh.cvut.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-04 13:18:18 +01:00
Clemens Ladisch 3bcd4649bc [ALSA] set owner field in struct pci_driver
AD1889 driver,ALS4000 driver,ATIIXP driver,ATIIXP-modem driver
AZT3328 driver,BT87x driver,CMIPCI driver,CS4281 driver
ENS1370/1+ driver,ES1938 driver,ES1968 driver,FM801 driver
Intel8x0 driver,Intel8x0-modem driver,Maestro3 driver,RME32 driver
RME96 driver,SonicVibes driver,VIA82xx driver,VIA82xx-modem driver
ALI5451 driver,au88x0 driver,CS46xx driver,EMU10K1/EMU10K2 driver
HDA Intel driver,ICE1712 driver,ICE1724 driver,KORG1212 driver
MIXART driver,NM256 driver,RME HDSP driver,RME9652 driver
Trident driver,Digigram VX222 driver,YMFPCI driver
Set the module owner field in each driver's struct pci_driver to get
the driver symlink in the sysfs device directory.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
2005-09-12 11:12:34 +02:00
Takashi Iwai e560d8d836 [ALSA] Replace with kzalloc() - pci stuff
AD1889 driver,ATIIXP driver,ATIIXP-modem driver,AZT3328 driver
BT87x driver,CMIPCI driver,CS4281 driver,ENS1370/1+ driver
ES1938 driver,ES1968 driver,FM801 driver,Intel8x0 driver
Intel8x0-modem driver,Maestro3 driver,SonicVibes driver,VIA82xx driver
VIA82xx-modem driver,AC97 Codec,AK4531 codec,au88x0 driver
CA0106 driver,CS46xx driver,EMU10K1/EMU10K2 driver,HDA Codec driver
HDA generic driver,HDA Intel driver,ICE1712 driver,ICE1724 driver
KORG1212 driver,MIXART driver,NM256 driver,Trident driver,YMFPCI driver
Replace kcalloc(1,..) with kzalloc().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-12 10:48:16 +02:00
Takashi Iwai 8cdfd2519c [ALSA] Remove superfluous PCI ID definitions
CS46xx driver,EMU10K1/EMU10K2 driver,PCM Midlevel,Trident driver
YMFPCI driver,BT87x driver,CMIPCI driver,CS4281 driver
ENS1370/1+ driver,ES1938 driver,ES1968 driver,Intel8x0 driver
Intel8x0-modem driver,Maestro3 driver,RME32 driver,RME96 driver
SonicVibes driver,VIA82xx driver,ALI5451 driver,ICE1712 driver
ICE1724 driver,NM256 driver,RME HDSP driver,RME9652 driver
Remove superfluous PCI ID definitions.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-12 10:47:02 +02:00
Takashi Iwai 01d25d460a [ALSA] Replace pci_module_init() with pci_register_driver()
Documentation,ALS4000 driver,ATIIXP driver,ATIIXP-modem driver
AZT3328 driver,BT87x driver,CMIPCI driver,CS4281 driver
ENS1370/1+ driver,ES1938 driver,ES1968 driver,FM801 driver
Intel8x0 driver,Intel8x0-modem driver,Maestro3 driver,RME32 driver
RME96 driver,SonicVibes driver,VIA82xx driver,VIA82xx-modem driver
ALI5451 driver,au88x0 driver,CA0106 driver,CS46xx driver
EMU10K1/EMU10K2 driver,HDA Intel driver,ICE1712 driver,ICE1724 driver
KORG1212 driver,MIXART driver,NM256 driver,RME HDSP driver
RME9652 driver,Trident driver,Digigram VX222 driver,YMFPCI driver
Replace the obsolete pci_module_init() with pci_register_driver().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-05-29 10:00:32 +02:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00