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* [PATCH] minimal alpha pt_regs fixesAl Viro2006-10-075-6/+14
| | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] m68k pt_regs fixesAl Viro2006-10-0744-169/+176
| | | | | | | | | | | | | | | m68k_handle_int() split in two functions: __m68k_handle_int() takes pt_regs * and does set_irq_regs(); m68k_handle_int() doesn't get pt_regs *. Places where we used to call m68k_handle_int() recursively with the same pt_regs have simply lost the second argument, the rest is switched to __m68k_handle_int(). The rest of patch is just dropping pt_regs * where needed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: null pointer dereferencing in reiserfs_read_bitmap_blockEric Eric Sesterhenn2006-10-071-2/+2
| | | | | | | | | null pointer dereferencing in reiserfs_read_bitmap_block. Signed-off-by: Alexander Zarochentsev <zam@namesys.com> Cc: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] swsusp: Make userland suspend work on SMP againRafael J. Wysocki2006-10-071-1/+1
| | | | | | | | | | Unfortunately one of the recent changes in swsusp has broken the userland suspend on SMP. Fix it. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: remove wrongly placed BUG_ONChristoph Lameter2006-10-071-1/+0
| | | | | | | | | | | Init list is called with a list parameter that is not equal to the cachep->nodelists entry under NUMA if more than one node exists. This is fully legitimatei. One may want to populate the list fields before switching nodelist pointers. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'irq-fixes' of git://git.parisc-linux.org/git/linux-2.6Linus Torvalds2006-10-0611-28/+29
|\ | | | | | | | | * 'irq-fixes' of git://git.parisc-linux.org/git/linux-2.6: Build fixes for struct pt_regs removal
| * Build fixes for struct pt_regs removalMatthew Wilcox2006-10-0611-28/+29
| | | | | | | | Signed-off-by: Matthew Wilcox <matthew@wil.cx>
* | [PATCH] x86_64 irq_regs fixAndrew Morton2006-10-061-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | smp_apic_timer_interrupt() needs to stack the pt_regs* for profile_tick. If any other of those APIC interrupt handlers want to run get_irq_regs() then their C entrypoint handlers will need the same treatment. Cc: Andi Kleen <ak@muc.de> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Acked-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | ARM: fix up nested irq regs usageLinus Torvalds2006-10-061-1/+2
|/ | | | | | | This should fix up the per-cpu irq register pointer if we have nested hardware interrupts. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ixp4xxdefconfig arm fixesFrederik Deweerdt2006-10-062-2/+3
| | | | | | | | With the following patch, the ixp4xxdefconfig builds correctly. I'll test some more configs if I get some time. Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fix mesh compile errors after irq changesOlaf Hering2006-10-061-2/+2
| | | | | | | | drivers/scsi/mesh.c:469: error: too many arguments to function 'mesh_interrupt' drivers/scsi/mesh.c:507: error: too many arguments to function 'mesh_interrupt' Signed-off-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsaLinus Torvalds2006-10-0613-74/+89
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: [ALSA] version 1.0.13 [ALSA] sound/pci/au88x0/au88x0.c: ioremap balanced with iounmap [ALSA] Handle file operations during snd_card disconnects using static file->f_op [ALSA] emu10k1: Fix outl() in snd_emu10k1_resume_regs() [ALSA] Repair snd-usb-usx2y for usb 2.6.18 [ALSA] Fix bug in snd-usb-usx2y's usX2Y_pcms_lock_check() [ALSA] Dereference after free in snd_hwdep_release() [ALSA] Fix memory leak in sound/isa/es18xx.c [ALSA] hda-intel - New pci id for Nvidia MCP61 [ALSA] Add new subdevice ids for hda-intel [ALSA] WM9712 fixes for ac97_patch.c [ALSA] hda/patch_si3054: new codec vendor IDs
| * [ALSA] version 1.0.13Jaroslav Kysela2006-10-061-3/+3
| | | | | | | | Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] sound/pci/au88x0/au88x0.c: ioremap balanced with iounmapAmol Lad2006-10-061-0/+1
| | | | | | | | | | | | Signed-off-by: Amol Lad <amol@verismonetworks.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] Handle file operations during snd_card disconnects using static ↵Karsten Wiese2006-10-062-42/+54
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | file->f_op Alsa used to kmalloc one file->f_op per file per disconnecting snd_card. This led to oopses sometimes when file->f_op was freed before __fput() finished. Patch adds a virtual device for disconnect: VDD. VDD consists of: LIST_HEAD(shutdown_files) protected by DEFINE_SPINLOCK(shutdown_mutex) static struct file_operations snd_shutdown_f_ops and functions assigned to it Additions to struct snd_monitor_file to specify if instance is hidden by VDD or not. A VDD's instance is created in snd_card_disconnect() under the card->files_lock. cleaned up in snd_card_file_remove() under the card->files_lock. Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] emu10k1: Fix outl() in snd_emu10k1_resume_regs()Arnaud Patard2006-10-061-2/+2
| | | | | | | | | | | | | | | | | | | | The emu10k1 driver saves the A_IOCFG and HCFG register on suspend and restores it on resumes. Unfortunately, this doesn't work as the arguments to outl() are reversed. Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] Repair snd-usb-usx2y for usb 2.6.18Karsten Wiese2006-10-062-22/+11
| | | | | | | | | | | | | | | | | | urb->start_frame rolls over beyond MAX_INT now. This is for stable kernel and stable alsa. Signed-off-by: Karsten Wiese <annabellesgarden@yahoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] Fix bug in snd-usb-usx2y's usX2Y_pcms_lock_check()Karsten Wiese2006-10-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | Fix bug in snd-usb-usx2y's usX2Y_pcms_lock_check() substream can be NULL...... in mainline, bug was introduced by: 2006-06-22 [ALSA] Add O_APPEND flag support to PCM Signed-off-by: Karsten Wiese <annabellesgarden@yahoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] Dereference after free in snd_hwdep_release()Florin Malita2006-10-061-1/+2
| | | | | | | | | | | | | | | | | | | | snd_card_file_remove() may free hw->card so we can't dereference hw->card->module after that. Coverity ID 1420. Signed-off-by: Florin Malita <fmalita@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] Fix memory leak in sound/isa/es18xx.cEric Sesterhenn2006-10-061-0/+1
| | | | | | | | | | | | | | | | Fixed a memory leak in the error patch. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] hda-intel - New pci id for Nvidia MCP61Dan Cyr2006-10-061-0/+1
| | | | | | | | | | | | | | | | Added the new PCI id to support Nvidia MCP61 in snd-hda-intel driver. Signed-off-by: Dan Cyr <rabidfly@hotmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] Add new subdevice ids for hda-intelTobin Davis2006-10-061-0/+4
| | | | | | | | | | | | | | | | | | | | This patch adds a couple of device ids for Acer laptops. In both cases, the owners got the driver working by adding 'model=acer' to their modprobe.conf files. Signed-off-by: Tobin Davis <tdavis@dsl-only.net> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] WM9712 fixes for ac97_patch.cLuke Zhang2006-10-061-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch by Luke Zhang fixes a couple of issues with the WM9712 support in ac97_patch.c Changes:- o Fix Out3 ZC switch invert. o Extend capture volume control to 6 bits. o Change Mic 1 volume mask to 5 bits (31). o Add Mic 2 volume. Signed-off-by: Luke Zhang <lzhang@intrinsyc.com> Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * [ALSA] hda/patch_si3054: new codec vendor IDsSasha Khapyorsky2006-10-061-0/+5
| | | | | | | | | | | | | | | | | | | | There are additional IDs for Si3054 codec based HDA modems. Most of them were discovered on discuss@linmodems.org list - Thanks to MarvS and all linmodems.org folks. Signed-off-by: Sasha Khapyorsky <sashak@alsa-project.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
* | [PATCH] make kernels with CONFIG_X86_GENERIC and !CONFIG_SMP compilableJiri Kosina2006-10-061-2/+3
| | | | | | | | | | | | | | | | | | | | CONFIG_X86_GENERIC is not exclusively CONFIG_SMP, as mach-default/ could be compiled also for UP archs. The patch fixes compilation error in include/asm/mach-summit/mach_apic.h in case CONFIG_X86_GENERIC && !CONFIG_SMP Signed-off-by: Jiri Kosina <jikos@jikos.cz> Acked-by: Keith Mannthey <kmannth@us.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Merge branch 'release' of ↵Linus Torvalds2006-10-064-5/+11
|\ \ | |/ |/| | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Fix breakage from irq change
| * [IA64] Fix breakage from irq changeTony Luck2006-10-064-5/+11
| | | | | | | | | | | | | | | | A few missed spots in ia64-land from this gigantic commit: 7d12e780e003f93433d49ce78cfedf4b4c52adc5 Signed-off-by: Tony Luck <tony.luck@intel.com>
* | Initial blind fixup for arm for irq changesLinus Torvalds2006-10-06100-328/+281
| | | | | | | | | | | | | | Untested, but this should fix up the bulk of the totally mechanical issues, and should make the actual detail fixing easier. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds2006-10-0621-107/+83
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] Use CONFIG_GENERIC_TIME and define TOD clock source. [PATCH] sysrq: irq change build fix. [S390] irq change build fixes. [S390] cio: 0 is a valid chpid. [S390] monwriter buffer limit. [S390] ap bus poll thread priority.
| * | [S390] Use CONFIG_GENERIC_TIME and define TOD clock source.Martin Schwidefsky2006-10-063-68/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fix too slow clock by using CONFIG_GENERIC_TIME and adding a clock source for the s390 time-of-day clock. As added benefit we get rid of the s390 specific definition of do_gettimeofday and do_settimeofday. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [PATCH] sysrq: irq change build fix.Heiko Carstens2006-10-061-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | drivers/char/sysrq.c: In function `sysrq_handle_crashdump': drivers/char/sysrq.c:98: warning: implicit declaration of function `get_irq_regs' Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] irq change build fixes.Heiko Carstens2006-10-0615-24/+36
| | | | | | | | | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: 0 is a valid chpid.Cornelia Huck2006-10-061-9/+16
| | | | | | | | | | | | | | | | | | | | | | | | In order to determine chpid validity, we need to check whether the corresponding path is specified in the pim. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] monwriter buffer limit.Melissa Howland2006-10-061-5/+5
| | | | | | | | | | | | | | | | | | | | | Make max_bufs a global (per linux guest) limit. Signed-off-by: Melissa Howland <melissah@us.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] ap bus poll thread priority.Christian Borntraeger2006-10-061-1/+1
| |/ | | | | | | | | | | | | | | The ap bus is supposed to have a low priority. We must use 19 instead of -20, which is just the opposite. Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [PATCH] um: irq changes break buildPekka Enberg2006-10-062-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | Fixup broken UML build due to 7d12e780e003f93433d49ce78cfedf4b4c52adc5 "IRQ: Maintain regs pointer globally rather than passing to IRQ handlers". Cc: David Howells <dhowells@redhat.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo "Blaisorblade" Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] knfsd: tidy up up meaning of 'buffer size' in nfsd/sunrpcNeilBrown2006-10-064-23/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is some confusion about the meaning of 'bufsz' for a sunrpc server. In some cases it is the largest message that can be sent or received. In other cases it is the largest 'payload' that can be included in a NFS message. In either case, it is not possible for both the request and the reply to be this large. One of the request or reply may only be one page long, which fits nicely with NFS. So we remove 'bufsz' and replace it with two numbers: 'max_payload' and 'max_mesg'. Max_payload is the size that the server requests. It is used by the server to check the max size allowed on a particular connection: depending on the protocol a lower limit might be used. max_mesg is the largest single message that can be sent or received. It is calculated as the max_payload, rounded up to a multiple of PAGE_SIZE, and with PAGE_SIZE added to overhead. Only one of the request and reply may be this size. The other must be at most one page. Cc: Greg Banks <gnb@sgi.com> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] md: fix bug where new drives added to an md array sometimes don't ↵NeilBrown2006-10-061-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sync properly This fixes a bug introduced in 2.6.18. If a drive is added to a raid1 using older tools (mdadm-1.x or raidtools) then it will be included in the array without any resync happening. It has been submitted for 2.6.18.1. Signed-off-by: Neil Brown <neilb@suse.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] mmc: multi sector write transfersPierre Ossman2006-10-062-9/+96
| | | | | | | | | | | | | | | | | | | | | | SD cards extend the protocol by allowing the host to query a card how many blocks were successfully stored on the medium. This allows us to safely write chunks of blocks at once. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] swarm: Actually initialize the IDE driverMaciej W. Rozycki2006-10-061-0/+2
| | | | | | | | | | | | | | | | | | | | This is required for the SWARM GenBus IDE interface to be recognized. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] sched: fix a kerneldoc error on is_init()Henne2006-10-061-3/+4
| | | | | | | | | | | | | | | | | | Fix a kerneldoc warning and reorderd the description for is_init(). Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] MAINTAINERS: take over scx200-* and pc8736* driversJim Cromie2006-10-061-4/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add MAINTAINERS entries for new scx200_hrt and pc8736x_gpio drivers, and take over maintenance of scx200_gpio, authored by Christer Weinigel (which I've hacked at), who no longer has the hardware. Also take over hwmon/pc87360, authored by Jean Delvare, who's dropped maintenance to dedicate more time to hwmon subsystem. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Christer Weinigel <christer@weinigel.se> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] Fix typo in "syntax error if percpu macros are incorrectly used" patchJan Blunck2006-10-064-7/+7
| | | | | | | | | | | | | | | | | | | | | | Trivial typo fix in the "syntax error if percpu macros are incorrectly used" patch. I misspelled "identifier" in all places. D'Oh! Thanks to Dirk Mueller to point this out. Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] m68k: dma_alloc_coherent() has gfp_t as the last argumentAl Viro2006-10-062-3/+3
| | | | | | | | | | | | | | | | | | annotate, fix the bogus argument of vmap() in it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] m68k: fix NBPG defineRoman Zippel2006-10-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | The recent header cleanup removed PAGE_SIZE from the exported information as it depends on the configuration. BTW This has possibly other consequences, as the core dump code is using PAGE_SIZE directly, which may need fixing as well. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] m68k: small system.h cleanupRoman Zippel2006-10-061-3/+3
| | | | | | | | | | | | | | | | avoid unnecessary xchg() use in set_mb() Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] m68k: fix typo in __generic_copy_to_userRoman Zippel2006-10-061-1/+1
| | | | | | | | | | | | | | | | Jump to the correct exit label after exception Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] m68k: cleanup string functionsRoman Zippel2006-10-063-115/+102
| | | | | | | | | | | | | | | | | | | | - cleanup asm of string functions - deinline strncat()/strncmp() - provide non-inlined strcpy() Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] provide tickadj defineRoman Zippel2006-10-061-0/+3
| | | | | | | | | | | | | | | | Provide a tickadj compatibility define for archs still using it. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] page fault retry with NOPAGE_REFAULTBenjamin Herrenschmidt2006-10-062-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a way for a no_page() handler to request a retry of the faulting instruction. It goes back to userland on page faults and just tries again in get_user_pages(). I added a cond_resched() in the loop in that later case. The problem I have with signal and spufs is an actual bug affecting apps and I don't see other ways of fixing it. In addition, we are having issues with infiniband and 64k pages (related to the way the hypervisor deals with some HV cards) that will require us to muck around with the MMU from within the IB driver's no_page() (it's a pSeries specific driver) and return to the caller the same way using NOPAGE_REFAULT. And to add to this, the graphics folks have been following a new approach of memory management that involves transparently swapping objects between video ram and main meory. To do that, they need installing PTEs from a no_page() handler as well and that also requires returning with NOPAGE_REFAULT. (For the later, they are currently using io_remap_pfn_range to install one PTE from no_page() which is a bit racy, we need to add a check for the PTE having already been installed afer taking the lock, but that's ok, they are only at the proof-of-concept stage. I'll send a patch adding a "clean" function to do that, we can use that from spufs too and get rid of the sparsemem hacks we do to create struct page for SPEs. Basically, that provides a generic solution for being able to have no_page() map hardware devices, which is something that I think sound driver folks have been asking for some time too). All of these things depend on having the NOPAGE_REFAULT exit path from no_page() handlers. Signed-off-by: Benjamin Herrenchmidt <benh@kernel.crashing.org> Cc: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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