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2009-06-04[ARM] 5535/1: U300 Makefile.bootLinus Walleij
The Makefile.boot file for the U300 port. This will compile the kernel for different ZRELADDR depending on the location of physical RAM in the chosen configuration. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-06-01[ARM] 5533/1: Add U300 series defconfigLinus Walleij
This adds a defconfig for the U300 series ST-Ericsson mobile platforms. It will be maintained to enable the maximum set of drivers so as to provide a good regression testing target for these platforms. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-05-31[ARM] make U300 clk_set_rate() return a _real_ errnoRussell King
Another stupid instance of "return -1"-ism. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-05-18[ARM] 5510/1: U300 GPIO debug and init fixesLinus Walleij
This moves the GPIO driver away from using __devinit and __devexit It also removes all printk() in favor of using dev_* print macros on pdev->dev struct instead. Surplus prints are removed, and the platform_device_probe() function is used instead of putting a .probe function in the platform driver struct. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-28[ARM] 5480/1: U300-v5 integrate into the ARM architectureLinus Walleij
This hooks the U300 support into Kbuild and makes a small hook in mmu.c for supporting an odd memory alignment with shared memory on these systems. This is rebased to RMK:s GIT HEAD. This patch tries to add the Kconfig option in alphabetic order by option text and the Makefile entry after config symbol. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-28[ARM] 5473/1: U300 core machine supportLinus Walleij
This adds core support for the ST-Ericsson U300 series platforms: U300, U330, U335 and U365. Supports memory mappings, interrupt controller, system timer (clocksource and clockevents), and binds to the existing drivers for the PrimeCells used in this design: PL190 (VIC), PL180 (MMC/SD host) and PL011 (UART). This is intented to serve as starting point for our mainling work, more patches to follow. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-28[ARM] 5474/1: U300 clocking frameworkLinus Walleij
This adds the clocking framework and hooks into the clkdevice for U300 series platforms. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-28[ARM] 5471/2: U300 GPIO and PADMUX supportLinus Walleij
This adds GPIO and PADMUX headers and implementation for the U300 platform. This is an implementation in isolation that depend on later patches in this series to plug into the framework. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-28[ARM] 5470/1: U300 register definitionsLinus Walleij
This adds registers, interrupt numbers and IO mappings for the U300 series platforms core support, including basic block offsets and registers definitions for the system controller. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-27[ARM] sort machine- and plat- by CONFIG* nameRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-27[ARM] Kconfig: sort ARM machine class support choice list by option nameRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-26[ARM] 5452/1: ep93x: rtc: use ioremap'ed addressesHartley Sweeten
Update the rtc-ep93xx driver to use ioremap'ed addresses. This removes the dependency on <mach/hardware.h> and properly reports the memory addresses used by the driver in /proc/iomem. In addition, ep93xx_rtc_init() is updated to use platform_driver_probe() instead of platform_driver_register(). Also, the device_create_file() calls are now properly checked for error conditions. The created sysfs files are also now removed when the driver is removed. The version number for the driver has been bumped at the request of Alessandro Zummo. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-26[ARM] Convert pmd_page() to be highmem safeRussell King
In the long run, we may want to place page tables in highmem. However, pmd_page() has traditionally been coded to convert the physical address to a virtual one, which won't work with highmem pages. Instead, translate the physical address to a PFN, and then convert the PFN to a struct page instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-24PM/Hibernate: Fix waiting for image device to appear on resumeRafael J. Wysocki
Commit c751085943362143f84346d274e0011419c84202 ("PM/Hibernate: Wait for SCSI devices scan to complete during resume") added a call to scsi_complete_async_scans() to software_resume(), so that it waited for the SCSI scanning to complete, but the call was added at a wrong place. Namely, it should have been added after wait_for_device_probe(), which is called only if the image partition hasn't been specified yet. Also, it's reasonable to check if the image partition is present and only wait for the device probing and SCSI scanning to complete if it is not the case. Additionally, since noresume is checked right at the beginning of software_resume() and the function returns immediately if it's set, it doesn't make sense to check it once again later. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24ROMFS: Advance destination buffer pointer when reading from a blockdevDavid Howells
RomFS should advance the destination buffer pointer when reading data from a blockdev source (the data may be split over multiple blocks, each requiring its own sb_read() call). Without this, all the data is copied to the beginning of the output buffer. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24ROMFS: romfs_lookup() shouldn't be doing a partial name comparisonDavid Howells
romfs_lookup() should be using a routine akin to strcmp() on the backing store, rather than one akin to strncmp(). If it uses the latter, it's liable to match /bin/shutdown when looking up /bin/sh. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24lib: find_last_bit.o needed by a module only, move it from lib to objFred Isaman
Currently, although find_last_bit is EXPORTed, it is statically linked with the kernel and is referenced only under CONFIG_SMP. When CONFIG_SMP is undefined and find_last_bit is referenced only by modules, linking fails with: ERROR: "find_last_bit" [fs/nfs/nfs.ko] undefined! Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Fred Isaman <iisaman@citi.umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24CacheFiles: Fix the documentation to use the correct credential pointer namesMarc Dionne
Adjust the CacheFiles documentation to use the correct names of the credential pointers in task_struct. The documentation was using names from the old versions of the credentials patches. Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24virtio-rng: Remove false BUG for spurious callbacksChristian Borntraeger
The virtio-rng drivers checks for spurious callbacks. Since callbacks can be implemented via shared interrupts (e.g. PCI) this could lead to guest kernel oopses with lots of virtio devices. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24Merge branch 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds
* 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: add parameter to microblaze_read() microblaze: Use CFLAGS_KERNEL instead of CFLAGS microblaze: Add STATE_SAVE_ARG_SPACE for noMMU kernel too microblaze: Do not check use_dcache microblaze: Do not use PVR configuration for broken MB version microblaze: Fix USR1/2 pvr printing message microblaze: iowrite upon timeout microblaze: Correspond CONFIG...PCMP in Makefile/Kconfig microblaze: Remove redundant variable microblaze: Move start_thread to process.c microblaze: Add missing preadv and pwritev syscalls microblaze: Add missing declaration for die and _exception func microblaze: Remove sparse error in traps.c microblaze: Move task_pt_regs up microblaze: Rename kernel_mode to pt_mode in pt_regs microblaze: Remove uncache shadow condition microblaze: Remove while(1) loop from show_regs function microblaze: Remove unneded per cpu SYSCALL_SAVE variable
2009-04-24Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (34 commits) ACPI, i915: Register ACPI video even when not modesetting Revert "ACPICA: delete check for AML access to port 0x81-83" I/O port protection: update for windows compatibility. sony-laptop: always try to unblock rfkill on load sony-laptop: fix bogus error message display on resume ACPI: EC: Fix ACPI EC resume non-query interrupt message sony-laptop: SNC input event 38 fix sony-laptop: SNC 127 Initialization Fix sony-laptop: Duplicate SNC 127 Event Fix ACPI: prevent processor.max_cstate=0 boot crash ACPI/hpet: prevent boot hang when hpet=force used on ICH-4M ACPI: delete obsolete "bus master activity" proc field ACPI: idle: mark_tsc_unstable() at init-time, not run-time ACPI: add /sys/firmware/acpi/interrupts/sci_not counter ACPI video: fix an error when the brightness levels on AC and on Battery are same acpi-cpufreq: Do not let get_measured perf depend on internal variable acpi-cpufreq: style-only: add parens to math expression acpi-cpufreq: Cleanup: Use printk_once x86, acpi_cpufreq: Fix the NULL pointer dereference in get_measured_perf thinkpad-acpi: bump up version to 0.23 ...
2009-04-24Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68knommu: update the default config for the ColdFire 5407C3 board m68knommu: update the default config for the ColdFire 5307C3 board m68knommu: update the default config for the ColdFire 5257EVB board m68knommu: update the default config for the ColdFire 5249EVB. m68knommu: add a defconfig for the ColdFire M5272C3 board m68knommu: update the defconfig for the ColdFire 5208evb board m68knommu: fix DMA support for ColdFire m68knommu: remove unused kernel stats offsets m68knommu: fix missing .data.cacheline_aligned section m68knommu: Fixed GPIO pin initialization for CONFIG_M5271 FEC.
2009-04-24Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: Fix potential inode allocation soft lockup in Orlov allocator ext4: Make the extent validity check more paranoid jbd: use SWRITE_SYNC_PLUG when writing synchronous revoke records jbd2: use SWRITE_SYNC_PLUG when writing synchronous revoke records ext4: really print the find_group_flex fallback warning only once
2009-04-24Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 5460/1: Orion: reduce namespace pollution [ARM] 5458/1: pcmcia: pxa2xx-sharpsl: check if we do have Scoop config [ARM] 5457/1: mach-imx gpio buildfix [ARM] 5456/1: add sys_preadv and sys_pwritev [ARM] pxa/pcm990: start external GPIOs immediately after built-in ones [ARM] pxa/palm27x: General fix for Palm27x aSoC driver [ARM] pxa/mioa701: use GPIO95 as AC97 reset line [ARM] pxa: merge AC97 platform data structures [ARM] pxa/magician: remove un-necessary #include of pxa-regs.h and hardware.h
2009-04-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: USB: pwc : do not pass stack allocated buffers to USB core. USB: otg: Fix bug on remove path without transceiver USB: correct error handling in cdc-wdm USB: removal of tty->low_latency hack dating back to the old serial code USB: serial: sierra driver bug fix for composite interface USB: gadget: omap_udc uses platform_driver_probe() USB: ci13xxx_udc: fix build error USB: musb: Prevent multiple includes of musb.h USB: pass mem_flags to dma_alloc_coherent USB: g_file_storage: fix use-after-free bug when closing files USB: ehci-sched.c: EHCI SITD scheduling bugfix USB: fix mos7840 problem with minor numbers USB: mos7840: add new device id USB: musb: fix build when !CONFIG_PM USB: musb: Remove my email address from few musb related drivers USB: Gadget: MIPS CI13xxx UDC bugfixes USB: Unusual Device support for Gold MP3 Player Energy USB: serial: fix lifetime and locking problems
2009-04-24Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6: eCryptfs: Larger buffer for encrypted symlink targets eCryptfs: Lock lower directory inode mutex during lookup eCryptfs: Remove ecryptfs_unlink_sigs warnings eCryptfs: Fix data corruption when using ecryptfs_passthrough eCryptfs: Print FNEK sig properly in /proc/mounts eCryptfs: NULL pointer dereference in ecryptfs_send_miscdev() eCryptfs: Copy lower inode attrs before dentry instantiation
2009-04-24Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: Update defconfigs for 2.6.30-rc3 m68k,m68knommu: Wire up preadv and pwritev scsi: a4000 - Correct driver unregistration in case of failure
2009-04-24Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: [S390] update default configuration. [S390] omit frame pointers on s390 when possible [S390] Use tape_generic_offline directly. [S390] /proc/stat idle field for idle cpus [S390] appldata: avoid deadlock with appldata_mem [S390] ipl: fix compile breakage
2009-04-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixesLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes: GFS2: Ensure that the inode goal block settings are updated GFS2: Fix bug in block allocation bitops: Add __ffs64 bitop
2009-04-24Merge branch 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: Unregister cpufreq notifier on unload KVM: x86: release time_page on vcpu destruction KVM: Fix overlapping check for memory slots KVM: MMU: disable global page optimization KVM: ia64: fix locking order entering guest KVM: MMU: Fix off-by-one calculating large page count
2009-04-24Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: MAINTAINERS: update IDE entry palm_bk3710: palm_bk3710_udmatimings[] CodingStyle fixup palm_bk3710: those registers/bitfields don't exist mediabay: fix build for CONFIG_BLOCK=n ide: Stop disks on reboot for laptop which cuts power ide-cd: fix kernel crash on hppa regression palm_bk3710: UDMA performance fix
2009-04-24Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ALSA: hda - Add quirk for Packard Bell RS65 [ALSA] intel8x0: another attempt to fix ac97_clock measure routine [ALSA] ac97_codec: increase timeout for analog subsections ALSA: hda - Add quirks for Realtek codecs ALSA: hda - Fix alc662_init_verbs ALSA: keywest: Convert to new-style i2c driver ALSA: AOA: Convert onyx and tas codecs to new-style i2c drivers ALSA: Atiixp: Add SSID for mute_led quirk (unknown HP model) ALSA: us122l: add snd_us122l_free() ASoC: Fix warning in wm9705 ASoC: OMAP: Update contact addresses ASoC: pxa-ssp: Don't use SSCR0_SerClkDiv and SSCR0_SCR ALSA: us122l: Fix signedness in comparisions
2009-04-24radio_si470x: Fix free memory corruptionAlan Cox
The release path for a disconnected device frees the object then unlocks the mutex in the freed object... Found by Dan Carpenter using Smatch Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24serial: remove contact dataNiels de Vos
Remove my name and emailaddress from note in the source. Wincor Nixdorf only has some ITE-chips on their mainboards, other chips are not available for me for testing. Signed-off-by: Niels de Vos <niels.devos@wincor-nixdorf.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24cafe_nand: Fix warningAlan Cox
Wrong types on IRQ handler Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: cfq-iosched: cache prio_tree root in cfqq->p_root cfq-iosched: fix bug with aliased request and cooperation detection cfq-iosched: clear ->prio_trees[] on cfqd alloc block: fix intermittent dm timeout based oops umem: fix request_queue lock warning block: simplify I/O stat accounting pktcdvd.h should include mempool.h cfq-iosched: use the default seek distance when there aren't enough seek samples cfq-iosched: make seek_mean converge more quickly block: make blk_abort_queue() ignore non-request based devices block: include empty disks in /proc/diskstats bio: use bio_kmalloc() in copy/map functions bio: fix bio_kmalloc() block: fix queue bounce limit setting block: fix SG_IO vector request data length handling scatterlist: make sure sg_miter_next() doesn't return 0 sized mappings
2009-04-24MN10300: Update the ASB2303 defconfigDavid Howells
Update the defconfig for the ASB2303 evaluation board. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24Delete slow-work timers properlyJonathan Corbet
Slow-work appears to delete its timer as soon as the first user unregisters, even though other users could be active. At the same time, it never seems to delete slow_work_oom_timer. Arrange for both to happen in the shutdown path. Signed-off-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (94 commits) netfilter: ctnetlink: fix gcc warning during compilation net/netrom: Fix socket locking netlabel: Always remove the correct address selector ucc_geth.c: Fix upsmr setting in RMII mode 8139too: fix HW initial flow af_iucv: Fix race when queuing incoming iucv messages af_iucv: Test additional sk states in iucv_sock_shutdown af_iucv: Reject incoming msgs if RECV_SHUTDOWN is set af_iucv: fix oops in iucv_sock_recvmsg() for MSG_PEEK flag af_iucv: consider state IUCV_CLOSING when closing a socket iwlwifi: DMA fixes iwlwifi: add debugging for TX path mwl8: fix build warning. mac80211: fix alignment calculation bug mac80211: do not print WARN if config interface iwl3945: use cancel_delayed_work_sync to cancel rfkill_poll iwlwifi: fix EEPROM validation mask to include OTP only devices atmel: fix netdev ops conversion pcnet_cs: add cis(firmware) of the Allied Telesis LA-PCM mlx4_en: Fix cleanup if workqueue create in mlx4_en_add() fails ...
2009-04-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc: Fix bus type probing for ESP and LE devices. sparc32: Update defconfig. sparc64: Update defconfig.
2009-04-24Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: Fix modular build of ide-pmac when mediabay is built in powerpc/pasemi: Fix build error on UP powerpc: Make macintosh/mediabay driver depend on CONFIG_BLOCK maintainers: Fix PS3 patterns powerpc/ps3: Fix CONFIG_PS3_FLASH=n build warning powerpc/32: Don't clobber personality flags on exec powerpc: Fix crash on CPU hotplug powerpc/85xx: Remove defconfigs that mpc85xx_{smp_}defconfig cover powerpc/85xx: Added SMP defconfig powerpc/85xx: Enabled a bunch of FSL specific drivers/options powerpc/85xx: Updated generic mpc85xx_defconfig powerpc: don't disable SATA interrupts on Freescale MPC8610 HPCD fsl_rio: Pass the proper device to dma mapping routines powerpc: Fix of_node_put() exit path in of_irq_map_one() powerpc/5200: defconfig updates powerpc/5200: Add FLASH nodes to lite5200 device tree powerpc/device-tree: Document MTD nodes with multiple "reg" tuples powerpc/of-device-tree: Factor MTD physmap bindings out of booting-without-of powerpc/5200: Bring the legacy fsl_spi_platform_data hooks back
2009-04-24Merge branch 'bjorn.button' into releaseLen Brown
2009-04-24Merge branch 'bugzilla-13036' into releaseLen Brown
2009-04-24Merge branch 'bugzilla-13048' into releaseLen Brown
2009-04-24Merge branch 'bugzilla-13142' into releaseLen Brown
2009-04-24Merge branch 'hpet' into releaseLen Brown
2009-04-24check_unsafe_exec: s/lock_task_sighand/rcu_read_lock/Oleg Nesterov
write_lock(&current->fs->lock) guarantees we can't wrongly miss LSM_UNSAFE_SHARE, this is what we care about. Use rcu_read_lock() instead of ->siglock to iterate over the sub-threads. We must see all CLONE_THREAD|CLONE_FS threads which didn't pass exit_fs(), it takes fs->lock too. With or without this patch we can miss the freshly cloned thread and set LSM_UNSAFE_SHARE, we don't care. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> [ Fixed lock/unlock typo - Hugh ] Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24do_execve() must not clear fs->in_exec if it was set by another threadOleg Nesterov
If do_execve() fails after check_unsafe_exec(), it clears fs->in_exec unconditionally. This is wrong if we race with our sub-thread which also does do_execve: Two threads T1 and T2 and another process P, all share the same ->fs. T1 starts do_execve(BAD_FILE). It calls check_unsafe_exec(), since ->fs is shared, we set LSM_UNSAFE but not ->in_exec. P exits and decrements fs->users. T2 starts do_execve(), calls check_unsafe_exec(), now ->fs is not shared, we set fs->in_exec. T1 continues, open_exec(BAD_FILE) fails, we clear ->in_exec and return to the user-space. T1 does clone(CLONE_FS /* without CLONE_THREAD */). T2 continues without LSM_UNSAFE_SHARE while ->fs is shared with another process. Change check_unsafe_exec() to return res = 1 if we set ->in_exec, and change do_execve() to clear ->in_exec depending on res. When do_execve() suceeds, it is safe to clear ->in_exec unconditionally. It can be set only if we don't share ->fs with another process, and since we already killed all sub-threads either ->in_exec == 0 or we are the only user of this ->fs. Also, we do not need fs->lock to clear fs->in_exec. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24cfq-iosched: cache prio_tree root in cfqq->p_rootJens Axboe
Currently we look it up from ->ioprio, but ->ioprio can change if either the process gets its IO priority changed explicitly, or if cfq decides to temporarily boost it. So if we are unlucky, we can end up attempting to remove a node from a different rbtree root than where it was added. Fix this by using ->org_ioprio as the prio_tree index, since that will only change for explicit IO priority settings (not for a boost). Additionally cache the rbtree root inside the cfqq, then we don't have to add code to reinsert the cfqq in the prio_tree if IO priority changes. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-24cfq-iosched: fix bug with aliased request and cooperation detectionJens Axboe
cfq_prio_tree_lookup() should return the direct match, yet it always returns zero. Fix that. cfq_prio_tree_add() assumes that we don't get a direct match, while it is very possible that we do. Using O_DIRECT, you can have different cfqq with matching requests, since you don't have the page cache to serialize things for you. Fix this bug by only adding the cfqq if there isn't an existing match. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>