1. 21 Dec, 2006 13 commits
    • Peter Williams's avatar
      [PATCH] sched: improve efficiency of sched_fork() · bc947631
      Peter Williams authored
      Problem:
        sched_fork() has always called scheduler_tick() in some (unlikely)
        circumstances in order to update the current task in light of those
        circumstances.  It has always been the case that the work done by
        scheduler_tick() was more than was required to handle the problem in
        hand but no harm was done except for the waste of a few CPU cycles.
      
        However, the splitting of scheduler_tick() into two procedures in
        2.6.20-rc1 enables the wasted cycles to be saved as the new procedure
        task_running_tick() does all the work that is required to rectify the
        problem being handled.
      
      Solution:
        Replace the call to scheduler_tick() in sched_fork() with a call to
        task_running_tick().
      Signed-off-by: default avatarPeter Williams <pwil3058@bigpond.com.au>
      Acked-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      bc947631
    • Ingo Molnar's avatar
      [PATCH] x86_64: fix boot time hang in detect_calgary() · 136f1e7a
      Ingo Molnar authored
      if CONFIG_CALGARY_IOMMU is built into the kernel via
      CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT, or is enabled via the
      iommu=calgary boot option, then the detect_calgary() function runs to
      detect the presence of a Calgary IOMMU.
      
      detect_calgary() first searches the BIOS EBDA area for a "rio_table_hdr"
      BIOS table. It has this parsing algorithm for the EBDA:
      
      	while (offset) {
      		...
      		/* The next offset is stored in the 1st word. 0 means no more */
       		offset = *((unsigned short *)(ptr + offset));
      	}
      
      got that? Lets repeat it slowly: we've got a BIOS-supplied data
      structure, plus Linux kernel code that will only break out of an
      infinite parsing loop once the BIOS gives a zero offset. Ok?
      
      Translation: what an excellent opportunity for BIOS writers to lock up
      the Linux boot process in an utterly hard to debug place! Indeed the
      BIOS jumped on that opportunity on my box, which has the following EBDA
      chaining layout:
      
        384, 65282, 65535, 65535, 65535, 65535, 65535, 65535 ...
      
      see the pattern? So my, definitely non-Calgary system happily locks up
      in detect_calgary()!
      
      the patch below fixes the boot hang by trusting the BIOS-supplied data
      structure a bit less: the parser always has to make forward progress,
      and if it doesnt, we break out of the loop and i get the expected kernel
      message:
      
        Calgary: Unable to locate Rio Grande Table in EBDA - bailing!
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Acked-by: default avatarMuli Ben-Yehuda <muli@il.ibm.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      136f1e7a
    • Ingo Molnar's avatar
      [PATCH] x86_64: fix boot hang caused by CALGARY_IOMMU_ENABLED_BY_DEFAULT · a9622f62
      Ingo Molnar authored
      one of my boxes didnt boot the 2.6.20-rc1-rt0 kernel rpm, it hung during
      early bootup. After an hour or two of happy debugging i narrowed it down
      to the CALGARY_IOMMU_ENABLED_BY_DEFAULT option, which was freshly added
      to 2.6.20 via the x86_64 tree and /enabled by default/.
      
      commit bff6547b claims:
      
          [PATCH] Calgary: allow compiling Calgary in but not using it by default
      
          This patch makes it possible to compile Calgary in but not use it by
          default. In this mode, use 'iommu=calgary' to activate it.
      
      but the change does not actually practice it:
      
       config CALGARY_IOMMU_ENABLED_BY_DEFAULT
              bool "Should Calgary be enabled by default?"
              default y
              depends on CALGARY_IOMMU
              help
                Should Calgary be enabled by default? if you choose 'y', Calgary
                will be used (if it exists). If you choose 'n', Calgary will not be
                used even if it exists. If you choose 'n' and would like to use
                Calgary anyway, pass 'iommu=calgary' on the kernel command line.
                If unsure, say Y.
      
      it's both 'default y', and says "If unsure, say Y". Clearly not a typo.
      
      disabling this option makes my box boot again. The patch below fixes the
      Kconfig entry. Grumble.
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      a9622f62
    • Geert Uytterhoeven's avatar
      [PATCH] __set_irq_handler bogus space · b039db8e
      Geert Uytterhoeven authored
      __set_irq_handler: Kill a bogus space
      Signed-off-by: default avatarGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      b039db8e
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block · 46040967
      Linus Torvalds authored
      * 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block:
        [PATCH] block: document io scheduler allow_merge_fn hook
        [PATCH] cfq-iosched: don't allow sync merges across queues
        [PATCH] Fixup blk_rq_unmap_user() API
        [PATCH] __blk_rq_unmap_user() fails to return error
        [PATCH] __blk_rq_map_user() doesn't need to grab the queue_lock
        [PATCH] Remove queue merging hooks
        [PATCH] ->nr_sectors and ->hard_nr_sectors are not used for BLOCK_PC requests
        [PATCH] cciss: fix XFER_READ/XFER_WRITE in do_cciss_request
        [PATCH] cciss: set default raid level when reading geometry fails
      46040967
    • Linus Torvalds's avatar
      Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev · 8df8bb4a
      Linus Torvalds authored
      * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
        [libata] sata_svw, sata_vsc: kill iomem warnings
        [PATCH] libata: take scmd->cmd_len into account when translating SCSI commands
        [PATCH] libata: kill @cdb argument from xlat methods
        [PATCH] libata: clean up variable name usage in xlat related functions
        [libata] Move some PCI IDs from sata_nv to ahci
        [libata] pata_via: suspend/resume support fix
        [libata] pata_cs5530: suspend/resume support tweak
      8df8bb4a
    • Linus Torvalds's avatar
      Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 · 28cb5ccd
      Linus Torvalds authored
      * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
        Driver core: proper prototype for drivers/base/init.c:driver_init()
        kobject: kobject_uevent() returns manageable value
        kref refcnt and false positives
      28cb5ccd
    • Linus Torvalds's avatar
      Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 · de9b2fcc
      Linus Torvalds authored
      * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (22 commits)
        acpiphp: Link-time error for PCI Hotplug
        shpchp: cleanup shpchp.h
        shpchp: remove shpchprm_get_physical_slot_number
        shpchp: cleanup struct controller
        shpchp: remove unnecessary struct php_ctlr
        PCI: ATI sb600 sata quirk
        PCI legacy resource fix
        PCI: don't export device IDs to userspace
        PCI: Be a bit defensive in quirk_nvidia_ck804() so we don't risk dereferencing a NULL pdev.
        PCI: Fix multiple problems with VIA hardware
        PCI: Only check the HT capability bits in mpic.c
        PCI: Use pci_find_ht_capability() in drivers/pci/quirks.c
        PCI: Add #defines for Hypertransport MSI fields
        PCI: Use pci_find_ht_capability() in drivers/pci/htirq.c
        PCI: Add pci_find_ht_capability() for finding Hypertransport capabilities
        PCI: Create __pci_bus_find_cap_start() from __pci_bus_find_cap()
        pci: Introduce pci_find_present
        PCI: pcieport-driver: remove invalid warning message
        rpaphp: compiler warning cleanup
        PCI quirks: remove redundant check
        ...
      de9b2fcc
    • Linus Torvalds's avatar
      Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6 · fb34d203
      Linus Torvalds authored
      * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6: (34 commits)
        USB Storage: remove duplicate Nokia entry in unusual_devs.h
        [PATCH] bluetooth: add support for another Kensington dongle
        [PATCH] usb serial: add support for Novatel S720/U720 CDMA/EV-DO modems
        [PATCH] USB: Nokia E70 is an unusual device
        USB: fix to usbfs_snoop logging of user defined control urbs
        USB: at91_udc: Additional checks
        USB: at91_udc: Cleanup variables after failure in usb_gadget_register_driver()
        USB: at91_udc: allow drivers that support high speed
        USB: u132-hcd/ftdi-elan: add support for Option GT 3G Quad card
        USB: at91_udc, misc fixes
        USB: at91 udc, support at91sam926x addresses
        USB: OHCI support for PNX8550
        USB: ohci handles hardware faults during root port resets
        USB: ohci at91 warning fix
        USB: ohci whitespace/comment fixups
        USB: MAINTAINERS update, EHCI and OHCI
        USB: gadget driver unbind() is optional; section fixes; misc
        UHCI: module parameter to ignore overcurrent changes
        USB: Nokia E70 is an unusual device
        USB AUERSWALD: replace kmalloc+memset with kzalloc
        ...
      fb34d203
    • Linus Torvalds's avatar
      Merge branch 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc · 5576d187
      Linus Torvalds authored
      * 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc:
        [POWERPC] Fix register save area alignment for swapcontext syscall
        [POWERPC] Fix PCI device channel state initialization
        [POWERPC] Update MTD OF documentation
        [POWERPC] Probe Efika platform before CHRP.
        [POWERPC] Fix build of cell zImage.initrd
        [POWERPC] iSeries: fix CONFIG_VIOPATH dependency
        [POWERPC] iSeries: fix viocons init
        [POWERPC] iSeries: fix viocd init
        [POWERPC] iSeries: fix iseries_veth init
        [POWERPC] iSeries: fix viotape init
        [POWERPC] iSeries: fix viodasd init
        [POWERPC] Workaround oldworld OF bug with IRQs & P2P bridges
        [POWERPC] powerpc: add scanning of ebc bus to of_platform
        [POWERPC] spufs: fix assignment of node numbers
        [POWERPC] cell: Fix spufs with "new style" device-tree
        [POWERPC] cell: Enable spider workarounds on all PCI buses
        [POWERPC] cell: add forward struct declarations to spu.h
        [POWERPC] cell: update cell_defconfig
      5576d187
    • Linus Torvalds's avatar
      Merge branch 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/drm-2.6 · ee2fae03
      Linus Torvalds authored
      * 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/drm-2.6:
        drm: Stop defining pci_pretty_name
        drm: r128: comment aligment with drm git
        drm: make kernel context switch same as for drm git tree.
        drm: fixup comment header style
        drm: savage: compat fix from drm git.
        drm: Unify radeon offset checking.
        i915_vblank_tasklet: Try harder to avoid tearing.
        DRM: handle pci_enable_device failure
        drm: fix return value check
      ee2fae03
    • Linus Torvalds's avatar
      Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa · e4ddc9cc
      Linus Torvalds authored
      * 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: (30 commits)
        [ALSA] version 1.0.14rc1
        [ALSA] ac97: Identify CMI9761 chips.
        [ALSA] ac97_codec - trivial fix for bit update functions
        [ALSA] snd-ca0106: Fix typos.
        [ALSA] snd-ca0106: Add new card variant.
        [ALSA] sound: fix PCM substream list
        [ALSA] sound: initialize rawmidi substream list
        [ALSA] snd_hda_intel 3stack mode for ASUS P5P-L2
        [ALSA] Remove IRQF_DISABLED for shared PCI irqs
        [ALSA] Fix invalid assignment of PCI revision
        [ALSA] Fix races in PCM OSS emulation
        [ALSA] hda-codec - fix typo in PCI IDs
        [ALSA] ac97 - Fix potential negative array index
        [ALSA] hda-codec - Verbose proc output for PCM parameters
        [ALSA] hda-codec - Fix detection of supported sample rates
        [ALSA] hda-codec - Fix model for ASUS V1j laptop
        [ALSA] sound/core/control.c: remove dead code
        [ALSA] hda-codec - Add model for HP q965
        [ALSA] pcm core: fix silence_start calculations
        [ALSA] hda-codec - Fix a typo
        ...
      e4ddc9cc
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm · eb2112fb
      Linus Torvalds authored
      * 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (29 commits)
        [ARM] 4062/1: S3C24XX: Anubis and Osiris shuld have CONFIG_PM_SIMTEC
        [ARM] 4060/1: update several ARM defconfigs
        [ARM] 4061/1: xsc3: change of maintainer
        [ARM] 4059/1: VR1000: fix LED3's platform device number
        [ARM] 4022/1: iop13xx: generic irq fixups
        [ARM] 4015/1: s3c2410 cpu ifdefs
        [ARM] 4057/1: ixp23xx: unconditionally enable hardware coherency
        [ARM] 4056/1: iop13xx: fix resource.end off-by-one in flash setup
        [ARM] 4055/1: iop13xx: fix phys_io/io_pg_offst for iq81340mc/sc
        [ARM] 4054/1: ep93xx: add HWCAP_CRUNCH
        [ARM] 4052/1: S3C24XX: Fix PM in arch/arm/mach-s3c2410/Kconfig
        [ARM] Fix warnings from asm/system.h
        [ARM] 4051/1: S3C24XX: clean includes in S3C2440 and S3C2442 support
        [ARM] 4050/1: S3C24XX: remove old changelogs in arch/arm/mach-s3c2410
        [ARM] 4049/1: S3C24XX: fix sparse warning due to upf_t in regs-serial.h
        [ARM] 4048/1: S3C24XX: make s3c2410_pm_resume() static
        [ARM] 4046/1: S3C24XX: fix sparse errors arch/arm/mach-s3c2410
        [ARM] 4045/1: S3C24XX: remove old VA for non-shared areas
        [ARM] 4044/1: S3C24XX: fix sparse warnings in arch/arm/mach-s3c2410/s3c2442-clock.c
        [ARM] 4043/1: S3C24XX: fix sparse warnings in arch/arm/mach-s3c2410/s3c2440-clock.c
        ...
      eb2112fb
  2. 20 Dec, 2006 27 commits