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* IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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)
* [PATCH] sound/mips/au1x00: Use ARRAY_SIZE macroTobias Klauser2006-09-291-1/+1
| | | | | | | | | Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] irq-flags: sound: Use the new IRQF_ constantsThomas Gleixner2006-07-021-2/+2
| | | | | | | | | | | 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>
* [ALSA] AMD Au1x00: AC'97 controller is memory mappedSergei Shtylyov2006-03-221-3/+4
| | | | | | | | | | | Modules: MIPS AU1x00 driver AMD Au1x00 ALSA driver erroneously calls request_region() for AC'97 controller registers -- the controller is actually memory mapped at addresses 0x10000000 thru 0x100FFFFF. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] AMD Au1x00: fix DMA init/cleanupSergei Shtylyov2006-03-221-13/+20
| | | | | | | | | | | Modules: MIPS AU1x00 driver AMD Au1x00 ALSA driver causes kernel oops in au1000_init() by trying to set DMA channel to -1 in yet unallocated audio streams. Here's the patch that staightens up DMA init/cleanup code. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] AMD Au1x00: make driver build after cleanupSergei Shtylylov2006-03-221-0/+2
| | | | | | | | | | | | | | | Modules: MIPS AU1x00 driver AMD Au1x00 ALSA driver doesn't build after the recent code cleanup: sound/mips/au1x00.c: In function 'au1000_setup_dma_link': sound/mips/au1x00.c:173: error: 'pointer' undeclared (first use in this function) sound/mips/au1x00.c:173: error: (Each undeclared identifier is reported only once sound/mips/au1x00.c:173: error: for each function it appears in.) sound/mips/au1x00.c: In function 'snd_au1000_hw_params': sound/mips/au1x00.c:339: warning: implicit declaration of function 'snd_mask_min' Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Remove snd_card_generic_dev()Takashi Iwai2006-01-032-6/+0
| | | | | | | Remove the obsolete snd_card_generic_dev(). CONFIG_SND_GENERIC_DRIVER is also removed from Kconfig. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Remove xxx_t typedefs: MIPS AU1x00Takashi Iwai2006-01-031-74/+74
| | | | | | | | Modules: MIPS AU1x00 driver Remove xxx_t typedefs from the MIPS AU1x00 driver. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] au1x00 - Code clean upTakashi Iwai2006-01-031-150/+150
| | | | | | | | | | | | | | Modules: MIPS AU1x00 driver Clean up snd-au1x00 driver code: - Remove global variables - Remove old compatibility codes - Fix DMA-link allocation/release functions in hw_params and hw_free callbacks (they may be called multiple times) - Fix spinlocks Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] AMD Au1x00 driver: buggy spinlocksKonstantin Baydarov2005-11-041-4/+4
| | | | | | | | | | | | Modules: MIPS AU1x00 driver AMD Au1x00 ALSA driver fails compilation with the alternate spinlock implementation because it doesn't do locking/unlocking correctly in some places (passes spinlock by value). Signed-off-by: Konstantin Baydarov <kbaidarov@ru.mvista.com> Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Remove obsolete chip_tTakashi Iwai2005-11-041-2/+0
| | | | | | | | Modules: Documentation,MIPS AU1x00 driver,PPC Beep,SPARC DBRI driver Removed the use of chip_t, which was obsoleted. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Remove vmalloc wrapper, kfree_nocheck()Takashi Iwai2005-11-041-2/+1
| | | | | | | | - Remove vmalloc wrapper - Add release_and_free_resource() to remove kfree_nocheck() from each driver and simplify the code Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Add snd_card_set_generic_dev() callTakashi Iwai2005-09-122-0/+6
| | | | | | | | | | | ARM,SA11xx UDA1341 driver,Generic drivers,MPU401 UART,MIPS MIPS AU1x00 driver,PPC,PPC PowerMac driver,SPARC,SPARC AMD7930 driver SPARC cs4231 driver,SPARC DBRI driver - Added snd_card_set_generic_dev() call. - Added SND_GENERIC_DRIVER to Kconfig. - Clean up the error path in probe if necessary. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-173-0/+709
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!
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