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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)
* [SOUND] sparc/amd7930: Use __devinit and __devinitdata as needed.David S. Miller2006-09-251-10/+10
| | | | | | Fixes section-mismatch errors. Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] sparc: resource warning fixAndrew Morton2006-07-031-2/+2
| | | | | | | | | | | | | sound/sparc/amd7930.c: In function 'amd7930_attach_common': sound/sparc/amd7930.c:1040: warning: format '%08lx' expects type 'long unsigned int', but argument 5 has type 'resource_size_t' sound/sparc/cs4231.c:2043: warning: format '%016lx' expects type 'long unsigned int', but argument 5 has type 'resource_size_t' sound/sparc/dbri.c: In function 'dbri_attach': sound/sparc/dbri.c:2650: warning: format '%016lx' expects type 'long unsigned int', but argument 5 has type 'resource_size_t' 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 Gleixner2006-07-021-1/+1
| | | | | | | | | | | 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>
* [SOUND] sparc: Port amd7930 to new SBUS device layer.David S. Miller2006-06-231-61/+77
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Kill __irq_itoa().David S. Miller2006-06-201-4/+4
| | | | | | | | | | | | | | | | | | This ugly hack was long overdue to die. It was a way to print out Sparc interrupts in a more freindly format, since IRQ numbers were arbitrary opaque 32-bit integers which vectored into PIL levels. These 32-bit integers were not necessarily in the 0-->NR_IRQS range, but the PILs they vectored to were. The idea now is that we will increase NR_IRQS a little bit and use a virtual<-->real IRQ number mapping scheme similar to PowerPC. That makes this IRQ printing hack irrelevant, and furthermore only a handful of drivers actually used __irq_itoa() making it even less useful. Signed-off-by: David S. Miller <davem@davemloft.net>
* [ALSA] Remove snd_card_generic_dev()Takashi Iwai2006-01-031-3/+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: SPARC AMD7930Takashi Iwai2006-01-031-65/+65
| | | | | | | | Modules: SPARC AMD7930 driver Remove xxx_t typedefs from the SPARC AMD7930 driver. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Remove superfluous pcm_free callbacksTakashi Iwai2006-01-031-9/+0
| | | | | | Remove superflous pcm_free callbacks. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Replace with kzalloc() - othersTakashi Iwai2005-09-121-1/+1
| | | | | | | | | | | Documentation,SA11xx UDA1341 driver,Generic drivers,MPU401 UART,OPL3 OPL4,Digigram VX core,I2C cs8427,I2C lib core,I2C tea6330t,L3 drivers AK4114 receiver,AK4117 receiver,PDAudioCF driver,PPC PMAC driver SPARC AMD7930 driver,SPARC cs4231 driver,Synth,Common EMU synth USB generic driver,USB USX2Y Replace kcalloc(1,..) with kzalloc(). Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Add snd_card_set_generic_dev() callTakashi Iwai2005-09-121-0/+3
| | | | | | | | | | | 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 Torvalds2005-04-161-0/+1146
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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