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2011-11-24cgroup_freezer: fix freezing groups with stopped tasksMichal Hocko
2d3cbf8b (cgroup_freezer: update_freezer_state() does incorrect state transitions) removed is_task_frozen_enough and replaced it with a simple frozen call. This, however, breaks freezing for a group with stopped tasks because those cannot be frozen and so the group remains in CGROUP_FREEZING state (update_if_frozen doesn't count stopped tasks) and never reaches CGROUP_FROZEN. Let's add is_task_frozen_enough back and use it at the original locations (update_if_frozen and try_to_freeze_cgroup). Semantically we consider stopped tasks as frozen enough so we should consider both cases when testing frozen tasks. Testcase: mkdir /dev/freezer mount -t cgroup -o freezer none /dev/freezer mkdir /dev/freezer/foo sleep 1h & pid=$! kill -STOP $pid echo $pid > /dev/freezer/foo/tasks echo FROZEN > /dev/freezer/foo/freezer.state while true do cat /dev/freezer/foo/freezer.state [ "`cat /dev/freezer/foo/freezer.state`" = "FROZEN" ] && break sleep 1 done echo OK Signed-off-by: Michal Hocko <mhocko@suse.cz> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Tomasz Buchert <tomasz.buchert@inria.fr> Cc: Paul Menage <paul@paulmenage.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@kernel.org Signed-off-by: Tejun Heo <htejun@gmail.com>
2011-11-18cgroup: Replace Paul Menage with Tejun Heo as cgroups maintainerPaul Menage
As is probably painfully obvious, I don't have time to be a cgroups maintainer. Rather than have me continue to hope that I'll magically find more spare time, instead Tejun has kindly agreed to take over the role, along with Li Zefan. -tj: added cgroup tree URL to MAINTAINERS file Signed-off-by: Paul Menage <paul@paulmenage.org> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Tejun Heo <tj@kernel.org> LKML-Reference: <1321320612-57855-1-git-send-email-paul@paulmenage.org>
2011-11-18Merge branch 'stable/for-linus-fixes-3.2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen-gntalloc: signedness bug in add_grefs() xen-gntalloc: integer overflow in gntalloc_ioctl_alloc() xen-gntdev: integer overflow in gntdev_alloc_map() xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs. xen/balloon: Avoid OOM when requesting highmem xen: Remove hanging references to CONFIG_XEN_PLATFORM_PCI xen: map foreign pages for shared rings by updating the PTEs directly
2011-11-18Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-block: block: add missed trace_block_plug paride: fix potential information leak in pg_read() bio: change some signed vars to unsigned block: avoid unnecessary plug list flush cciss: auto engage SCSI mid layer at driver load time loop: cleanup set_status interface include/linux/bio.h: use a static inline function for bio_integrity_clone() loop: prevent information leak after failed read block: Always check length of all iov entries in blk_rq_map_user_iov() The Windows driver .inf disables ASPM on all cciss devices. Do the same. backing-dev: ensure wakeup_timer is deleted block: Revert "[SCSI] genhd: add a new attribute "alias" in gendisk"
2011-11-18Merge branch 'unicore32' of git://github.com/gxt/linuxLinus Torvalds
* 'unicore32' of git://github.com/gxt/linux: unicore32, exec: remove redundant set_fs(USER_DS) unicore32: Fix typo 'PUV3_I2C' unicore32: drop unused Kconfig symbols rtc: rtc-puv3: Add __devinit and __devexit markers for probe and remove arch/unicore32: do not use EXTRA_AFLAGS or EXTRA_CFLAGS unicore32: fix build error for find bitops
2011-11-18Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/signal32: Fix sigset_t conversion when copying to user powerpc: Fix atomic_xxx_return barrier semantics powerpc: Remove buggy 9-year-old test for binutils < 2.12.1 powerpc/book3e-64: Fix debug support for userspace powerpc: Remove extraneous CONFIG_PPC_ADV_DEBUG_REGS define powerpc: Revert show_regs() define for readability powerpc/ps3: Fix SMP lockdep boot warning powerpc/ps3: Fix lost SMP IPIs powerpc: Add hvcall.h include to book3s_hv.c powerpc/trace: Add a dummy stack frame for trace_hardirqs_off powerpc: Copy down exception vectors after feature fixups powerpc: panic if we can't instantiate RTAS powerpc/4xx: Fix typos in kexec config dependencies powerpc/fsl: MCU_MPC8349EMITX wants I2C built-in, modular won't do... powerpc/fsl_udc_core: Fix dumb typo carma-fpga: Missed switch from of_register_platform_driver() powerpc: Fix build breakage in jump_label.c
2011-11-18Merge branch 'for-linus' of git://git.selinuxproject.org/~jmorris/linux-securityLinus Torvalds
* 'for-linus' of git://git.selinuxproject.org/~jmorris/linux-security: encrypted-keys: module build fixes encrypted-keys: fix error return code Smack: smackfs cipso seq read repair
2011-11-18Merge branch 'encrypted-key-fixes' of ↵James Morris
git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity into for-linus
2011-11-18Merge branch 'for-1111' of git://gitorious.org/smack-next/kernel into for-linusJames Morris
2011-11-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: [SCSI] hpsa: Disable ASPM [SCSI] aacraid: controller hangs if kernel uses non-default ASPM policy [SCSI] mpt2sas: add missing allocation. [SCSI] Silencing 'killing requests for dead queue' [SCSI] fix WARNING: at drivers/scsi/scsi_lib.c:1704
2011-11-17Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - Fix the connection selection of ADCs on Cirrus codecs ALSA: hda - Update URLs in document ALSA: hda - move eld->spk_alloc fixup to hdmi_update_eld() ALSA: hda - delayed ELD repoll ALSA: hda - fix ELD memory leak ALSA: hda/realtek: remove redundant semicolon ALSA: hda - pwr_nids cleanup for IDT codecs
2011-11-17Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Fix irqfixup, irqpoll regression
2011-11-17fix typo/thinko in get_random_bytes()Luck, Tony
If there is an architecture-specific random number generator we use it to acquire randomness one "long" at a time. We should put these random words into consecutive words in the result buffer - not just overwrite the first word again and again. Signed-off-by: Tony Luck <tony.luck@intel.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-11-17platform/x86: fix dell-laptop function prototypesRandy Dunlap
Fix build warnings: drivers/platform/x86/dell-laptop.c:592:13: warning: function declaration isn't a prototype drivers/platform/x86/dell-laptop.c:599:13: warning: function declaration isn't a prototype Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Matthew Garrett <mjg@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-11-17media/staging: fix allyesconfig build errorRandy Dunlap
Fix x86 allyesconfig builds. Builds fail due to a non-static variable named 'debug' in drivers/staging/media/as102: arch/x86/built-in.o:arch/x86/kernel/entry_32.S:1296: first defined here ld: Warning: size of symbol `debug' changed from 90 in arch/x86/built-in.o to 4 in drivers/built-in.o Thou shalt have no non-static identifiers that are named 'debug'. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Pierrick Hascoet <pierrick.hascoet@abilis.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-11-17powerpc/signal32: Fix sigset_t conversion when copying to userWill Deacon
On PPC64, put_sigset_t converts a sigset_t to a compat_sigset_t before copying it to userspace. There is a typo in the case that we have 4 words to copy, meaning that we corrupt the compat_sigset_t. It appears that _NSIG_WORDS can't be greater than 2 at the moment so this code is probably always optimised away anyway. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-17powerpc: Fix atomic_xxx_return barrier semanticsBenjamin Herrenschmidt
The Documentation/memory-barriers.txt document requires that atomic operations that return a value act as a memory barrier both before and after the actual atomic operation. Our current implementation doesn't guarantee this. More specifically, while a load following the isync can not be issued before stwcx. has completed, that completion doesn't architecturally means that the result of stwcx. is visible to other processors (or any previous stores for that matter) (typically, the other processors L1 caches can still hold the old value). This has caused an actual crash in RCU torture testing on Power 7 This fixes it by changing those atomic ops to use new macros instead of RELEASE/ACQUIRE barriers, called ATOMIC_ENTRY and ATMOIC_EXIT barriers, which are then defined respectively to lwsync and sync. I haven't had a chance to measure the performance impact (or rather what I measured with kernel compiles is in the noise, I yet have to find a more precise benchmark) Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2011-11-17powerpc: Remove buggy 9-year-old test for binutils < 2.12.1Kyle Moffett
Recent binutils refuses to assemble AltiVec opcodes when in e500/SPE mode, as some of those opcodes alias the "SPE" instructions. This triggers an ancient binutils version check even when building a kernel with CONFIG_ALTIVEC disabled. In theory, the check could be conditionalized on CONFIG_ALTIVEC, but in practice it has long outlived its utility. It is virtually impossible to find binutils older than 2.12.1 (released 2002) in the wild anymore. Even ancient RedHat Enterprise Linux 4 has binutils-2.14. To fix the kernel build when done natively on e500 systems with this new binutils, the test is simply removed. Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-17powerpc/book3e-64: Fix debug support for userspaceKumar Gala
With the introduction of CONFIG_PPC_ADV_DEBUG_REGS user space debug is broken on Book-E 64-bit parts that support delayed debug events. When switch_booke_debug_regs() sets DBCR0 we'll start getting debug events as MSR_DE is also set and we aren't able to handle debug events from kernel space. We can remove the hack that always enables MSR_DE and loads up DBCR0 and just utilize switch_booke_debug_regs() to get user space debug working again. We still need to handle critical/debug exception stacks & proper save/restore of state for those exception levles to support debug events from kernel space like we have on 32-bit. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-17powerpc: Remove extraneous CONFIG_PPC_ADV_DEBUG_REGS defineKumar Gala
All of DebugException is already protected by CONFIG_PPC_ADV_DEBUG_REGS there is no need to have another such ifdef inside the function. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-17powerpc: Revert show_regs() define for readabilityKumar Gala
We had an existing ifdef for 4xx & BOOKE processors that got changed to CONFIG_PPC_ADV_DEBUG_REGS. The define has nothing to do with CONFIG_PPC_ADV_DEBUG_REGS. The define really should be: #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE) and not #ifdef CONFIG_PPC_ADV_DEBUG_REGS Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-16encrypted-keys: module build fixesMimi Zohar
Encrypted keys are encrypted/decrypted using either a trusted or user-defined key type, which is referred to as the 'master' key. The master key may be of type trusted iff the trusted key is builtin or both the trusted key and encrypted keys are built as modules. This patch resolves the build dependency problem. - Use "masterkey-$(CONFIG_TRUSTED_KEYS)-$(CONFIG_ENCRYPTED_KEYS)" construct to encapsulate the above logic. (Suggested by Dimtry Kasatkin.) - Fixing the encrypted-keys Makefile, results in a module name change from encrypted.ko to encrypted-keys.ko. - Add module dependency for request_trusted_key() definition Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
2011-11-16encrypted-keys: fix error return codeMimi Zohar
Fix request_master_key() error return code. Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
2011-11-16xen-gntalloc: signedness bug in add_grefs()Dan Carpenter
gref->gref_id is unsigned so the error handling didn't work. gnttab_grant_foreign_access() returns an int type, so we can add a cast here, and it doesn't cause any problems. gnttab_grant_foreign_access() can return a variety of errors including -ENOSPC, -ENOSYS and -ENOMEM. CC: stable@kernel.org Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-16xen-gntalloc: integer overflow in gntalloc_ioctl_alloc()Dan Carpenter
On 32 bit systems a high value of op.count could lead to an integer overflow in the kzalloc() and gref_ids would be smaller than expected. If the you triggered another integer overflow in "if (gref_size + op.count > limit)" then you'd probably get memory corruption inside add_grefs(). CC: stable@kernel.org Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-16xen-gntdev: integer overflow in gntdev_alloc_map()Dan Carpenter
The multiplications here can overflow resulting in smaller buffer sizes than expected. "count" comes from a copy_from_user(). Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-16xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs.Zhenzhong Duan
PVHVM running with more than 32 vcpus and pv_irq/pv_time enabled need VCPU placement to work, or else it will softlockup. CC: stable@kernel.org Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-16xen/balloon: Avoid OOM when requesting highmemDaniel De Graaf
If highmem pages are requested from the balloon on a system without highmem, the implementation of alloc_xenballooned_pages will allocate all available memory trying to find highmem pages to return. Allow low memory to be returned when highmem pages are requested to avoid this loop. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-16xen: Remove hanging references to CONFIG_XEN_PLATFORM_PCIDaniel De Graaf
In 5fbdc10395cd500d6ff844825a918c4e6f38de37 the XEN_PLATFORM_PCI config option was removed, but references in header files remained. Clean up those references. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-16xen: map foreign pages for shared rings by updating the PTEs directlyDavid Vrabel
When mapping a foreign page with xenbus_map_ring_valloc() with the GNTTABOP_map_grant_ref hypercall, set the GNTMAP_contains_pte flag and pass a pointer to the PTE (in init_mm). After the page is mapped, the usual fault mechanism can be used to update additional MMs. This allows the vmalloc_sync_all() to be removed from alloc_vm_area(). Signed-off-by: David Vrabel <david.vrabel@citrix.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> [v1: Squashed fix by Michal for no-mmu case] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-11-16ALSA: hda - Fix the connection selection of ADCs on Cirrus codecsTakashi Iwai
spec->cur_adc isn't set until cs_capture_pcm_prepare() is called although the driver tries to select the connection at init time and at auto-mic switch. This results in the access to the widget NID 0, which is obviously invalid, also a wrong capture source. This patch fixes the issue by issuing the connect-select verb conditionally at appropriate places. Reported-and-tested-by: Dylan Reid <dgreid@chromium.org> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-11-16ALSA: hda - Update URLs in documentTakashi Iwai
Some stuff was moved from kernel.org to other places. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-11-16ALSA: hda - move eld->spk_alloc fixup to hdmi_update_eld()Wu Fengguang
It looks more natural and saves two lines of code. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-11-16ALSA: hda - delayed ELD repollWu Fengguang
The Intel HDMI chips (ironlake at least) are found to have ~250ms delay between the ELD_Valid=1 hotplug event is send and the ELD buffer becomes actually readable. During the time the ELD buffer is mysteriously all 0. Fix it by scheduling a delayed work to re-read ELD buffer after 300ms. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-11-16ALSA: hda - fix ELD memory leakWu Fengguang
memset(eld) clears eld->proc_entry which will leak the struct snd_info_entry when unloading module. Fix it by - memset only the fields before eld->eld_buffer - set eld->eld_valid to true _after_ all eld fields have been filled Cc: <stable@kernel.org> Cc: Pierre-louis Bossart <pierre-louis.bossart@intel.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-11-16Merge 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] topology: fix topology on z10 machines [S390] crypto: avoid MSA3 and MSA4 instructions in ESA mode [S390] avoid STCKF if running in ESA mode [S390] zfcpdump: Do not initialize zfcpdump in kdump mode [S390] ap: Setup processing for messages in request queue. [S390] Kconfig: Select CONFIG_KEXEC for CONFIG_CRASH_DUMP [S390] incorrect note program header [S390] pfault: ignore leftover completion interrupts [S390] fix pgste update logic [S390] wire up process_vm syscalls
2011-11-16block: add missed trace_block_plugShaohua Li
After flush plug list, the list has no request, so we need to add a trace_block_plug(). Signed-off-by: Shaohua Li <shaohua.li@intel.com> Reviewed-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16paride: fix potential information leak in pg_read()Dan Carpenter
Smatch has a new check for Rosenberg type information leaks where structs are copied to the user with uninitialized stack data in them. i In this case, the pg_write_hdr struct has a hole in it. struct pg_write_hdr { char magic; /* 0 1 */ char func; /* 1 1 */ /* XXX 2 bytes hole, try to pack */ int dlen; /* 4 4 */ Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Tim Waugh <tim@cyberelk.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16bio: change some signed vars to unsignedDan Carpenter
This is just a cleanup patch to silence a static checker warning. The problem is that we cap "nr_iovecs" so it can't be larger than "UIO_MAXIOV" but we don't check for negative values. It turns out this is prevented at other layers, but logically it doesn't make sense to have negative nr_iovecs so making it unsigned is nicer. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16block: avoid unnecessary plug list flushShaohua Li
get_request_wait() could sleep and flush the plug list. If the list is already flushed, don't flush again. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Reviewed-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16cciss: auto engage SCSI mid layer at driver load timeStephen M. Cameron
A long time ago, probably in 2002, one of the distros, or maybe more than one, loaded block drivers prior to loading the SCSI mid layer. This meant that the cciss driver, being a block driver, could not engage the SCSI mid layer at init time without panicking, and relied on being poked by a userland program after the system was up (and the SCSI mid layer was therefore present) to engage the SCSI mid layer. This is no longer the case, and cciss can safely rely on the SCSI mid layer being present at init time and engage the SCSI mid layer straight away. This means that users will see their tape drives and medium changers at driver load time without need for a script in /etc/rc.d that does this: for x in /proc/driver/cciss/cciss* do echo "engage scsi" > $x done However, if no tape drives or medium changers are detected, the SCSI mid layer will not be engaged. If a tape drive or medium change is later hot-added to the system it will then be necessary to use the above script or similar for the device(s) to be acceesible. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16loop: cleanup set_status interfaceDmitry Monakhov
1) Anyone who has read access to loopdev has permission to call set_status and may change important parameters such as lo_offset, lo_sizelimit and so on, which contradicts to read access pattern and definitely equals to write access pattern. 2) Add lo_offset over i_size check to prevent blkdev_size overflow. ##Testcase_bagin #dd if=/dev/zero of=./file bs=1k count=1 #losetup /dev/loop0 ./file /* userspace_application */ struct loop_info64 loinf; fd = open("/dev/loop0", O_RDONLY); ioctl(fd, LOOP_GET_STATUS64, &loinf); /* Set offset to any value which is bigger than i_size, and sizelimit * to nonzero value*/ loinf.lo_offset = 4096*1024; loinf.lo_sizelimit = 1024; ioctl(fd, LOOP_SET_STATUS64, &loinf); /* After this loop device will have size similar to 0x7fffffffffxxxx */ #blockdev --getsz /dev/loop0 ##OUTPUT: 36028797018955968 ##Testcase_end [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16include/linux/bio.h: use a static inline function for bio_integrity_clone()Stephen Rothwell
When CONFIG_BLK_DEV_INTEGRITY is not set, we get these warnings: drivers/md/dm.c: In function 'split_bvec': drivers/md/dm.c:1061:3: warning: statement with no effect drivers/md/dm.c: In function 'clone_bio': drivers/md/dm.c:1088:3: warning: statement with no effect Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16loop: prevent information leak after failed readDmitry Monakhov
If read was not fully successful we have to fail whole bio to prevent information leak of old pages ##Testcase_begin dd if=/dev/zero of=./file bs=1M count=1 losetup /dev/loop0 ./file -o 4096 truncate -s 0 ./file # OOps loop offset is now beyond i_size, so read will silently fail. # So bio's pages would not be cleared, may which result in information leak. hexdump -C /dev/loop0 ##testcase_end Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-11-16powerpc/ps3: Fix SMP lockdep boot warningGeoff Levand
Move the PS3 IPI message setup from ps3_smp_setup_cpu() to ps3_smp_probe(). Fixes startup warnings like these: ------------[ cut here ]------------ WARNING: at kernel/lockdep.c:2649 Modules linked in: ... ---[ end trace 31fd0ba7d8756001 ]--- Signed-off-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-16powerpc/ps3: Fix lost SMP IPIsGeoff Levand
Fixes the PS3 bootup hang introduced in 3.0-rc1 by: commit 317f394160e9beb97d19a84c39b7e5eb3d7815a sched: Move the second half of ttwu() to the remote cpu Move the PS3's LV1 EOI call lv1_end_of_interrupt_ext() from ps3_chip_eoi() to ps3_get_irq() for IPI messages. If lv1_send_event_locally() is called between a previous call to lv1_send_event_locally() and the coresponding call to lv1_end_of_interrupt_ext() the second event will not be delivered to the target cpu. The PS3's SMP IPIs are implemented using lv1_send_event_locally(), so if two IPI messages of the same type are sent to the same target in a relatively short period of time the second IPI event can become lost when lv1_end_of_interrupt_ext() is called from ps3_chip_eoi(). CC: stable@kernel.org Signed-off-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-16powerpc: Add hvcall.h include to book3s_hv.cMichael Neuling
If you build with KVM and UP it fails with the following due to a missing include. /arch/powerpc/kvm/book3s_hv.c: In function 'do_h_register_vpa': arch/powerpc/kvm/book3s_hv.c:156:10: error: 'H_PARAMETER' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c:156:10: note: each undeclared identifier is reported only once for each function it appears in arch/powerpc/kvm/book3s_hv.c:192:12: error: 'H_RESOURCE' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c:222:9: error: 'H_SUCCESS' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c: In function 'kvmppc_pseries_do_hcall': arch/powerpc/kvm/book3s_hv.c:228:30: error: 'H_SUCCESS' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c:232:7: error: 'H_CEDE' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c:234:7: error: 'H_PROD' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c:238:10: error: 'H_PARAMETER' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c:250:7: error: 'H_CONFER' undeclared (first use in this function) arch/powerpc/kvm/book3s_hv.c:252:7: error: 'H_REGISTER_VPA' undeclared (first use in this function) make[2]: *** [arch/powerpc/kvm/book3s_hv.o] Error 1 Signed-off-by: Michael Neuling <mikey@neuling.org> cc: stable@kernel.org (3.1 only) Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-16powerpc/trace: Add a dummy stack frame for trace_hardirqs_offKevin Hao
The trace_hardirqs_off will use CALLER_ADDR0 and CALLER_ADDR1. If an exception occurs in user mode, there is only one stack frame on the stack and accessing the CALLER_ADDR1 will causes the following call trace. So we create a dummy stack frame to make trace_hardirqs_off happy. WARNING: at kernel/smp.c:459 Modules linked in: NIP: c0093280 LR: c00930a0 CTR: c0010780 REGS: edb87ae0 TRAP: 0700 Not tainted (3.1.0) MSR: 00021002 <ME,CE> CR: 28002888 XER: 00000000 TASK = edce2ac0[17658] 'mthread-lock-on' THREAD: edb86000 CPU: 5 GPR00: 00000001 edb87b90 edce2ac0 00000005 c0019594 edb87bd8 00000001 00000fe3 GPR08: 00041000 c084138c 4e20120d edb87b90 48002888 1001aa7c 00000000 00000000 GPR16: 48830000 10012a8c 00000000 10000af4 00000001 c0810000 00000000 00000000 GPR24: ee9aa920 c0816a18 00000000 00000005 c0019594 edb87bd8 ee20178c edb87b90 NIP [c0093280] smp_call_function_many+0x214/0x2b4 LR [c00930a0] smp_call_function_many+0x34/0x2b4 Call Trace: [edb87b90] [c00930a0] smp_call_function_many+0x34/0x2b4 (unreliable) [edb87bd0] [c00194ec] __flush_tlb_page+0xac/0x100 [edb87c00] [c001957c] flush_tlb_page+0x3c/0x54 [edb87c10] [c00180ac] ptep_set_access_flags+0x74/0x12c [edb87c40] [c0128068] handle_pte_fault+0x2f0/0x9ac [edb87cb0] [c0128c3c] handle_mm_fault+0x104/0x1dc [edb87ce0] [c05f40f4] do_page_fault+0x2dc/0x630 [edb87e50] [c001078c] handle_page_fault+0xc/0x80 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-16powerpc: Copy down exception vectors after feature fixupsAnton Blanchard
kdump fails because we try to execute an HV only instruction. Feature fixups are being applied after we copy the exception vectors down to 0 so they miss out on any updates. We have always had this issue but it only became critical in v3.0 when we added CFAR support (breaks POWER5) and v3.1 when we added POWERNV (breaks everyone). Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> [v3.0+] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-16powerpc: panic if we can't instantiate RTASAnton Blanchard
I had to debug a strange situation where all manner of things were failing. SMT threads, storage and network were all completely broken. The root cause was we couldn't find enough memory to instantiate RTAS - this was a network install so the initrd was huge. Instead of limping along and failing in mysterious ways we should just panic up front if RTAS exists and we can't allocate space for it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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