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* IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-052-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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)
* [ALSA] Add dB scale information to pcxhr driverTakashi Iwai2006-09-231-0/+16
| | | | | | | Added the dB scale information to pcxhr driver. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
* [ALSA] Fix section mismatch errors in ALSA PCI driversTakashi Iwai2006-07-121-1/+1
| | | | | | | | | 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>
* [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>
* [ALSA] Remove unneeded read/write_size fields in proc text opsTakashi Iwai2006-06-221-2/+2
| | | | | | | Remove unneeded read/write_size fields in proc text ops. snd_info_set_text_ops() is fixed, too. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] add __devinitdata to all pci_device_idHenrik Kretzschmar2006-04-271-1/+1
| | | | | Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] pcxhr - Fix a compiler warning on 64bit architecturesHenrik Kretzschmar2006-04-271-2/+2
| | | | | | | | | The patch fixes a conpile warning on 64bit architectures, caused by different sizes of size_t . Since size_t is unsigned I permited myself to cange the format, too. Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] sound/pci/: remove duplicate #include'sAdrian Bunk2006-04-271-1/+0
| | | | | | | There's no reason for #include'ing linux/dma-mapping.h more than once. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] pcxhr - Fix the crash with REV01 boardMarkus Bollinger2006-03-311-6/+3
| | | | | | | | | | | | | | | On a new board revision for pcxhr boards, the PCXHR_CHIPSC_GPI_USERI bit is no more supported. The cards concerned have a REV01 in their PCI ID. As the current driver tests this bit and does not load the first Xilinx binary when it's 1, the card will crash on Xilinx access over PCI. (the PCI will freeze ....) The fix (fix to version 1.0.11rc4) works for both REV00 and REV01 cards. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [PATCH] Replace 0xff.. with correct DMA_xBIT_MASKMatthias Gehre2006-03-281-0/+1
| | | | | | | | | | 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>
* [PATCH] Intruduce DMA_28BIT_MASKTobias Klauser2006-03-221-1/+2
| | | | | | | | | This patch introduces the DMA_28BIT_MASK constant in dma-mapping.h ALSA drivers using this mask are changed to use the new constant. Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Acked-by: Takashi Iwai <tiwai@suse.de> Acked-by: Jaroslav Kysela <perex@suse.cz>
* [ALSA] semaphore -> mutex (PCI part)Ingo Molnar2006-03-223-56/+60
| | | | | | | | | | | Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] pcxhr - Suppress debug messagesTakashi Iwai2006-03-221-1/+1
| | | | | | | | Modules: Digigram PCXHR driver Suppress debug messages. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] pcxhr - Fix printk warningAndrew Morton2006-01-221-1/+1
| | | | | | | | | | Modules: Digigram PCXHR driver sound/pci/pcxhr/pcxhr.c: In function 'pcxhr_update_r_buffer': sound/pci/pcxhr/pcxhr.c:460: warning: unsigned int format, different type arg (arg 7) Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] pcxhr - Fix the sample rate changesTakashi Iwai2006-01-221-3/+4
| | | | | | | | Modules: Digigram PCXHR driver Fix the hardware set up when the sample rate is changed multiple times. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [ALSA] Add PCXHR driverMarkus Bollinger2006-01-039-0/+4498
Modules: Documentation,PCI drivers,Digigram PCXHR driver Add Digigram PCXHR driver. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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