- 27 10月, 2016 1 次提交
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由 Jens Axboe 提交于
If we end up sleeping due to running out of requests, we should update the hardware and software queues in the map ctx structure. Otherwise we could end up having rq->mq_ctx point to the pre-sleep context, and risk corrupting ctx->rq_list since we'll be grabbing the wrong lock when inserting the request. Reported-by: NDave Jones <davej@codemonkey.org.uk> Reported-by: NChris Mason <clm@fb.com> Tested-by: NChris Mason <clm@fb.com> Fixes: 63581af3 ("blk-mq: remove non-blocking pass in blk_mq_map_request") Signed-off-by: NJens Axboe <axboe@fb.com>
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- 26 10月, 2016 1 次提交
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由 Ming Lei 提交于
This patch fixes one issue reported by Kent, which can be triggered in bcachefs over sata disk. Actually it is a generic issue in block flush vs. blk-tag. Cc: Christoph Hellwig <hch@infradead.org> Reported-by: NKent Overstreet <kent.overstreet@gmail.com> Signed-off-by: NMing Lei <tom.leiming@gmail.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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- 25 10月, 2016 1 次提交
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由 John W. Linville 提交于
Commit 0eadf37a ("nbd: allow block mq to deal with timeouts") changed normal usage of nbd->sock_lock to use spin_lock/spin_unlock rather than the *_irq variants, but it missed this unlock in an error path. Found by Coverity, CID 1373871. Signed-off-by: NJohn W. Linville <linville@tuxdriver.com> Cc: Josef Bacik <jbacik@fb.com> Cc: Jens Axboe <axboe@fb.com> Cc: Markus Pargmann <mpa@pengutronix.de> Fixes: 0eadf37a ("nbd: allow block mq to deal with timeouts") Signed-off-by: NJens Axboe <axboe@fb.com>
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- 22 10月, 2016 6 次提交
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由 Shaohua Li 提交于
When bandblocks_set acknowledges a range or badblocks_clear a range, it's possible all badblocks are acknowledged. We should update unacked_exist if this occurs. Signed-off-by: NShaohua Li <shli@fb.com> Reviewed-by: NTomasz Majchrzak <tomasz.majchrzak@intel.com> Tested-by: NTomasz Majchrzak <tomasz.majchrzak@intel.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Sagi Grimberg 提交于
This library was moved to the generic area and was renamed to irq-poll. Hence, update proc/softirqs output accordingly. Signed-off-by: NSagi Grimberg <sagi@grimberg.me> Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi由 Linus Torvalds 提交于
Pull SCSI fixes from James Bottomley: "Five small fixes. Some of these, like the nested spinlock overwriting saved flags and the Kasan use after free look serious, but they seem not to have been picked up in testing or seen in the field. The biggest user visible issue is probably the wrong device handler for Clariion, which means that alua doesn't bind to the array like it should" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: ipr: Fix async error WARN_ON scsi: zfcp: spin_lock_irqsave() is not nestable scsi: Remove one useless stack variable scsi: Fix use-after-free scsi: Replace wrong device handler name for CLARiiON arrays
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git://git.kernel.dk/linux-block由 Linus Torvalds 提交于
Pull block fixes from Jens Axboe: "A set of fixes that missed the merge window, mostly due to me being away around that time. Nothing major here, a mix of nvme cleanups and fixes, and one fix for the badblocks handling" * 'for-linus' of git://git.kernel.dk/linux-block: nvmet: use symbolic constants for CNS values nvme: use symbolic constants for CNS values nvme.h: add an enum for cns values nvme.h: don't use uuid_be nvme.h: resync with nvme-cli nvme: Add tertiary number to NVME_VS nvme : Add sysfs entry for NVMe CMBs when appropriate nvme: don't schedule multiple resets nvme: Delete created IO queues on reset nvme: Stop probing a removed device badblocks: fix overlapping check for clearing
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci由 Linus Torvalds 提交于
Pull PCI fixes from Bjorn Helgaas: "This includes: - Fix for a Layerscape driver issue that causes a use-before-set crash - Maintainer update for the Synopsis prototyping device driver" * tag 'pci-v4.9-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: PCI: designware-plat: Update author email address PCI: layerscape: Fix drvdata usage before assignment PCI: designware-plat: Change maintainer to Jose Abreu
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git://people.freedesktop.org/~airlied/linux由 Linus Torvalds 提交于
Pull more drm fixes from Dave Airlie: "Mainly some vmwgfx fixes, but also some fixes for armada, etnaviv and fsl-dcu" * tag 'drm-fixes-for-v4.9-rc2-part2' of git://people.freedesktop.org/~airlied/linux: drm/fsl-dcu: enable pixel clock when enabling CRTC drm/fsl-dcu: do not transfer registers in mode_set_nofb drm/fsl-dcu: do not transfer registers on plane init drm/fsl-dcu: enable TCON bypass mode by default drm/vmwgfx: Adjust checks for null pointers in 13 functions drm/vmwgfx: Use memdup_user() rather than duplicating its implementation drm/vmwgfx: Use kmalloc_array() in vmw_surface_define_ioctl() drm/vmwgfx: Avoid validating views on view destruction drm/vmwgfx: Limit the user-space command buffer size drm/vmwgfx: Remove a leftover debug printout drm/vmwgfx: Allow resource relocations on byte boundaries drm/vmwgfx: Enable SVGA_3D_CMD_DX_TRANSFER_FROM_BUFFER command drm/vmwgfx: Remove call to reservation_object_test_signaled_rcu before wait drm/vmwgfx: Replace numeric parameter like 0444 with macro drm/etnaviv: block 64K of address space behind each cmdstream drm/etnaviv: ensure write caches are flushed at end of user cmdstream drm/armada: fix clock counts
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- 21 10月, 2016 9 次提交
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由 Joao Pinto 提交于
Although I am leaving Synopsys, I would like to keep working with the linux kernel community and help in what you might find useful. For that I am sending this patch to change my contact e-mail. Signed-off-by: NJoao Pinto <jpinto@synopsys.com> Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
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git://git.pengutronix.de/lst/linux由 Dave Airlie 提交于
2 more patches to stabilize the new MMUv2 support. * 'drm-etnaviv-fixes' of git://git.pengutronix.de/lst/linux: drm/etnaviv: block 64K of address space behind each cmdstream drm/etnaviv: ensure write caches are flushed at end of user cmdstream
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ssh://people.freedesktop.org/~syeh/repos_linux由 Dave Airlie 提交于
vmwgfx cleanups and fixes. * 'drm-vmwgfx-fixes' of ssh://people.freedesktop.org/~syeh/repos_linux: drm/vmwgfx: Adjust checks for null pointers in 13 functions drm/vmwgfx: Use memdup_user() rather than duplicating its implementation drm/vmwgfx: Use kmalloc_array() in vmw_surface_define_ioctl() drm/vmwgfx: Avoid validating views on view destruction drm/vmwgfx: Limit the user-space command buffer size drm/vmwgfx: Remove a leftover debug printout drm/vmwgfx: Allow resource relocations on byte boundaries drm/vmwgfx: Enable SVGA_3D_CMD_DX_TRANSFER_FROM_BUFFER command drm/vmwgfx: Remove call to reservation_object_test_signaled_rcu before wait drm/vmwgfx: Replace numeric parameter like 0444 with macro
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git://git.armlinux.org.uk/~rmk/linux-arm由 Dave Airlie 提交于
One small fix for Armada, where the clock prepare/enable counts were going awry. * 'drm-armada-fixes' of git://git.armlinux.org.uk/~rmk/linux-arm: drm/armada: fix clock counts
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http://git.agner.ch/git/linux-drm-fsl-dcu由 Dave Airlie 提交于
This are some fixes which I hoped to still get into v4.9. I used to test them here since about 2 weeks and Meng came around to test it on the second platform making use of this IP too, so they are well tested now. * 'fixes-for-v4.9-rc2' of http://git.agner.ch/git/linux-drm-fsl-dcu: drm/fsl-dcu: enable pixel clock when enabling CRTC drm/fsl-dcu: do not transfer registers in mode_set_nofb drm/fsl-dcu: do not transfer registers on plane init drm/fsl-dcu: enable TCON bypass mode by default
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm由 Linus Torvalds 提交于
Pull power management fix from Rafael Wysocki: "This fixes the pointer arithmetics mess-up in the cpufreq core introduced by one of recent commits and leading to all kinds of breakage from kernel crashes to incorrect governor decisions (Sergey Senozhatsky)" * tag 'pm-4.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: fix overflow in cpufreq_table_find_index_dl()
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由 Rafael J. Wysocki 提交于
* pm-cpufreq: cpufreq: fix overflow in cpufreq_table_find_index_dl()
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux由 Linus Torvalds 提交于
Pull arm64 fixes from Will Deacon: "Most of these are CC'd for stable, but there are a few fixing issues introduced during the recent merge window too. There's also a fix for the xgene PMU driver, but it seemed daft to send as a separate pull request, so I've included it here with the rest of the fixes. - Fix ACPI boot due to recent broken NUMA changes - Fix remote enabling of CPU features requiring PSTATE bit manipulation - Add address range check when emulating user cache maintenance - Fix LL/SC loops that allow compiler to introduce memory accesses - Fix recently added write_sysreg_s macro - Ensure MDCR_EL2 is initialised on qemu targets without a PMU - Avoid kaslr breakage due to MODVERSIONs and DYNAMIC_FTRACE - Correctly drive recent ld when building relocatable Image - Remove junk IS_ERR check from xgene PMU driver added during merge window - pr_cont fixes after core changes in the merge window" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: remove pr_cont abuse from mem_init arm64: fix show_regs fallout from KERN_CONT changes arm64: kernel: force ET_DYN ELF type for CONFIG_RELOCATABLE=y arm64: suspend: Reconfigure PSTATE after resume from idle arm64: mm: Set PSTATE.PAN from the cpu_enable_pan() call arm64: cpufeature: Schedule enable() calls instead of calling them via IPI arm64: Cortex-A53 errata workaround: check for kernel addresses arm64: percpu: rewrite ll/sc loops in assembly arm64: swp emulation: bound LL/SC retries before rescheduling arm64: sysreg: Fix use of XZR in write_sysreg_s arm64: kaslr: keep modules close to the kernel when DYNAMIC_FTRACE=y arm64: kernel: Init MDCR_EL2 even in the absence of a PMU perf: xgene: Remove bogus IS_ERR() check arm64: kernel: numa: fix ACPI boot cpu numa node mapping arm64: kaslr: fix breakage with CONFIG_MODVERSIONS=y
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git://github.com/ceph/ceph-client由 Linus Torvalds 提交于
Pull Ceph fixes from Ilya Dryomov: "An rbd exclusive-lock edge case fix and several filesystem fixups. Nikolay's error path patch is tagged for stable, everything else but readdir vs frags race was introduced in this merge window" * tag 'ceph-for-4.9-rc2' of git://github.com/ceph/ceph-client: ceph: fix non static symbol warning ceph: fix uninitialized dentry pointer in ceph_real_mount() ceph: fix readdir vs fragmentation race ceph: fix error handling in ceph_read_iter rbd: don't retry watch reregistration if header object is gone rbd: don't wait for the lock forever if blacklisted
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- 20 10月, 2016 22 次提交
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc由 Linus Torvalds 提交于
Pull MMC fixes from Ulf Hansson: "Here are some mmc fixes intended for v4.9 rc2. This time I have also included a few changes for a memstick driver which has a corresponding mmc driver. They use the same USB device as parent, hence both needs to play nice with runtime PM, which they didn't. MMC core: - Update MAINTAINERS as the mmc tree moved to kernel.org - A few fixes for HS400es mode - A few other minor fixes MMC host: - sdhci: Fix an issue when dealing with stop commands - sdhci-pci: Fix a bus power failure issue - sdhci-esdhc-imx: Correct two register accesses - sdhci-of-arasan: Fix the 1.8V I/O signal switch behaviour - rtsx_usb_sdmmc: Fix runtime PM issues Other: (Because of no maintainer) - memstick: rtsx_usb_ms: Fix runtime PM issues" * tag 'mmc-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: MAINTAINERS: mmc: Move the mmc tree to kernel.org memstick: rtsx_usb_ms: Manage runtime PM when accessing the device memstick: rtsx_usb_ms: Runtime resume the device when polling for cards mmc: rtsx_usb_sdmmc: Handle runtime PM while changing the led mmc: rtsx_usb_sdmmc: Avoid keeping the device runtime resumed when unused mmc: sdhci: cast unsigned int to unsigned long long to avoid unexpeted error mmc: sdhci-esdhc-imx: Correct two register accesses mmc: sdhci-pci: Fix bus power failing to enable for some Intel controllers mmc: sdhci-pci: Let devices define their own sdhci_ops mmc: sdhci: Rename sdhci_set_power() to sdhci_set_power_noreg() mmc: sdhci: Fix SDHCI_QUIRK2_STOP_WITH_TC mmc: core: Annotate cmd_hdr as __le32 mmc: sdhci-of-arasan: add sdhci_arasan_voltage_switch for arasan, 5.1 mmc: core: changes frequency to hs_max_dtr when selecting hs400es mmc: core: switch to 1V8 or 1V2 for hs400es mode mmc: block: add missing header dependencies mmc: sdhci-of-arasan: Fix non static symbol warning
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs由 Linus Torvalds 提交于
Pull misc filesystem fixes from Jan Kara: "A fix for an isofs change apparently breaking mount(8) in some cases and one ext2 warning fix" * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: ext2: avoid bogus -Wmaybe-uninitialized warning isofs: Do not return EACCES for unknown filesystems
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由 Sergey Senozhatsky 提交于
'best' is always less or equals to 'pos', so `best - pos' returns a negative value which is then getting casted to `unsigned int' and passed to __cpufreq_driver_target()->acpi_cpufreq_target() for policy->freq_table selection. This results in BUG: unable to handle kernel paging request at ffff881019b469f8 IP: [<ffffffffa00356c1>] acpi_cpufreq_target+0x4f/0x190 [acpi_cpufreq] PGD 267f067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 6 PID: 70 Comm: kworker/6:1 Not tainted 4.9.0-rc1-next-20161017-dbg-dirty Workqueue: events dbs_work_handler task: ffff88041b808000 task.stack: ffff88041b810000 RIP: 0010:[<ffffffffa00356c1>] [<ffffffffa00356c1>] acpi_cpufreq_target+0x4f/0x190 [acpi_cpufreq] RSP: 0018:ffff88041b813c60 EFLAGS: 00010282 RAX: ffff880419b46a00 RBX: ffff88041b848400 RCX: ffff880419b20f80 RDX: 00000000001dff38 RSI: 00000000ffffffff RDI: ffff88041b848400 RBP: ffff88041b813cb0 R08: 0000000000000006 R09: 0000000000000040 R10: ffffffff8207f9e0 R11: ffffffff8173595b R12: 0000000000000000 R13: ffff88041f1dff38 R14: 0000000000262900 R15: 0000000bfffffff4 FS: 0000000000000000(0000) GS:ffff88041f000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff881019b469f8 CR3: 000000041a2d3000 CR4: 00000000001406e0 Stack: ffff88041b813cb0 ffffffff813347f9 ffff88041b813ca0 ffffffff81334663 ffff88041f1d4bc0 ffff88041b848400 0000000000000000 0000000000000000 0000000000262900 0000000000000000 ffff88041b813d00 ffffffff813355dc Call Trace: [<ffffffff813347f9>] ? cpufreq_freq_transition_begin+0xf1/0xfc [<ffffffff81334663>] ? get_cpu_idle_time+0x97/0xa6 [<ffffffff813355dc>] __cpufreq_driver_target+0x3b6/0x44e [<ffffffff81336ca3>] cs_dbs_timer+0x11a/0x135 [<ffffffff81336fda>] dbs_work_handler+0x39/0x62 [<ffffffff81057823>] process_one_work+0x280/0x4a5 [<ffffffff81058719>] worker_thread+0x24f/0x397 [<ffffffff810584ca>] ? rescuer_thread+0x30b/0x30b [<ffffffff81418380>] ? nl80211_get_key+0x29/0x36a [<ffffffff8105d2b7>] kthread+0xfc/0x104 [<ffffffff8107ceea>] ? put_lock_stats.isra.9+0xe/0x20 [<ffffffff8105d1bb>] ? kthread_create_on_node+0x3f/0x3f [<ffffffff814b2092>] ret_from_fork+0x22/0x30 Code: 56 4d 6b ff 0c 41 55 41 54 53 48 83 ec 28 48 8b 15 ad 1e 00 00 44 8b 41 08 48 8b 87 c8 00 00 00 49 89 d5 4e 03 2c c5 80 b2 78 81 <46> 8b 74 38 04 45 3b 75 00 75 11 31 c0 83 39 00 0f 84 1c 01 00 RIP [<ffffffffa00356c1>] acpi_cpufreq_target+0x4f/0x190 [acpi_cpufreq] RSP <ffff88041b813c60> CR2: ffff881019b469f8 ---[ end trace 16d9fc7a17897d37 ]--- [ rjw: In some cases this bug may also cause incorrect frequencies to be selected by cpufreq governors. ] Fixes: 899bb664 (cpufreq: skip invalid entries when searching the frequency) Link: http://marc.info/?l=linux-kernel&m=147672030714331&w=2Reported-and-tested-by: NSedat Dilek <sedat.dilek@gmail.com> Reported-and-tested-by: NJörg Otte <jrg.otte@gmail.com> Signed-off-by: NSergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Cc: 4.8+ <stable@vger.kernel.org> # 4.8+ Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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由 Mark Rutland 提交于
All the lines printed by mem_init are independent, with each ending with a newline. While they logically form a large block, none are actually continuations of previous lines. The kernel-side printk code and the userspace demsg tool differ in their handling of KERN_CONT following a newline, and while this isn't always a problem kernel-side, it does cause difficulty for userspace. Using pr_cont causes the userspace tool to not print line prefix (e.g. timestamps) even when following a newline, mis-aligning the output and making it harder to read, e.g. [ 0.000000] Virtual kernel memory layout: [ 0.000000] modules : 0xffff000000000000 - 0xffff000008000000 ( 128 MB) vmalloc : 0xffff000008000000 - 0xffff7dffbfff0000 (129022 GB) .text : 0xffff000008080000 - 0xffff0000088b0000 ( 8384 KB) .rodata : 0xffff0000088b0000 - 0xffff000008c50000 ( 3712 KB) .init : 0xffff000008c50000 - 0xffff000008d50000 ( 1024 KB) .data : 0xffff000008d50000 - 0xffff000008e25200 ( 853 KB) .bss : 0xffff000008e25200 - 0xffff000008e6bec0 ( 284 KB) fixed : 0xffff7dfffe7fd000 - 0xffff7dfffec00000 ( 4108 KB) PCI I/O : 0xffff7dfffee00000 - 0xffff7dffffe00000 ( 16 MB) vmemmap : 0xffff7e0000000000 - 0xffff800000000000 ( 2048 GB maximum) 0xffff7e0000000000 - 0xffff7e0026000000 ( 608 MB actual) memory : 0xffff800000000000 - 0xffff800980000000 ( 38912 MB) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=6, Nodes=1 Fix this by using pr_notice consistently for all lines, which both the kernel and userspace are happy with. Signed-off-by: NMark Rutland <mark.rutland@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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由 Mark Rutland 提交于
Recently in commit 4bcc595c ("printk: reinstate KERN_CONT for printing continuation lines"), the behaviour of printk changed w.r.t. KERN_CONT. Now, KERN_CONT is mandatory to continue existing lines. Without this, prefixes are inserted, making output illegible, e.g. [ 1007.069010] pc : [<ffff00000871898c>] lr : [<ffff000008718948>] pstate: 40000145 [ 1007.076329] sp : ffff000008d53ec0 [ 1007.079606] x29: ffff000008d53ec0 [ 1007.082797] x28: 0000000080c50018 [ 1007.086160] [ 1007.087630] x27: ffff000008e0c7f8 [ 1007.090820] x26: ffff80097631ca00 [ 1007.094183] [ 1007.095653] x25: 0000000000000001 [ 1007.098843] x24: 000000ea68b61cac [ 1007.102206] ... or when dumped with the userpace dmesg tool, which has slightly different implicit newline behaviour. e.g. [ 1007.069010] pc : [<ffff00000871898c>] lr : [<ffff000008718948>] pstate: 40000145 [ 1007.076329] sp : ffff000008d53ec0 [ 1007.079606] x29: ffff000008d53ec0 [ 1007.082797] x28: 0000000080c50018 [ 1007.086160] [ 1007.087630] x27: ffff000008e0c7f8 [ 1007.090820] x26: ffff80097631ca00 [ 1007.094183] [ 1007.095653] x25: 0000000000000001 [ 1007.098843] x24: 000000ea68b61cac [ 1007.102206] We can't simply always use KERN_CONT for lines which may or may not be continuations. That causes line prefixes (e.g. timestamps) to be supressed, and the alignment of all but the first line will be broken. For even more fun, we can't simply insert some dummy empty-string printk calls, as GCC warns for an empty printk string, and even if we pass KERN_DEFAULT explcitly to silence the warning, the prefix gets swallowed unless there is an additional part to the string. Instead, we must manually iterate over pairs of registers, which gives us the legible output we want in either case, e.g. [ 169.771790] pc : [<ffff00000871898c>] lr : [<ffff000008718948>] pstate: 40000145 [ 169.779109] sp : ffff000008d53ec0 [ 169.782386] x29: ffff000008d53ec0 x28: 0000000080c50018 [ 169.787650] x27: ffff000008e0c7f8 x26: ffff80097631de00 [ 169.792913] x25: 0000000000000001 x24: 00000027827b2cf4 Signed-off-by: NMark Rutland <mark.rutland@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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由 Ard Biesheuvel 提交于
GNU ld used to set the ELF file type to ET_DYN for PIE executables, which is the same file type used for shared libraries. However, this was changed recently, and now PIE executables are emitted as ET_EXEC instead. The distinction is only relevant for ELF loaders, and so there is little reason to care about the difference when building the kernel, which is why the change has gone unnoticed until now. However, debuggers do use the ELF binary, and expect ET_EXEC type files to appear in memory at the exact offset described in the ELF metadata. This means source level debugging is no longer possible when KASLR is in effect or when executing the stub. So add the -shared LD option when building with CONFIG_RELOCATABLE=y. This forces the ELF file type to be set to ET_DYN (which is what you get when building with binutils 2.24 and earlier anyway), and has no other ill effects. Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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由 James Morse 提交于
The suspend/resume path in kernel/sleep.S, as used by cpu-idle, does not save/restore PSTATE. As a result of this cpufeatures that were detected and have bits in PSTATE get lost when we resume from idle. UAO gets set appropriately on the next context switch. PAN will be re-enabled next time we return from user-space, but on a preemptible kernel we may run work accessing user space before this point. Add code to re-enable theses two features in __cpu_suspend_exit(). We re-use uao_thread_switch() passing current. Signed-off-by: NJames Morse <james.morse@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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由 James Morse 提交于
Commit 338d4f49 ("arm64: kernel: Add support for Privileged Access Never") enabled PAN by enabling the 'SPAN' feature-bit in SCTLR_EL1. This means the PSTATE.PAN bit won't be set until the next return to the kernel from userspace. On a preemptible kernel we may schedule work that accesses userspace on a CPU before it has done this. Now that cpufeature enable() calls are scheduled via stop_machine(), we can set PSTATE.PAN from the cpu_enable_pan() call. Add WARN_ON_ONCE(in_interrupt()) to check the PSTATE value we updated is not immediately discarded. Reported-by: NTony Thompson <anthony.thompson@arm.com> Reported-by: NVladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: NJames Morse <james.morse@arm.com> [will: fixed typo in comment] Signed-off-by: NWill Deacon <will.deacon@arm.com>
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由 James Morse 提交于
The enable() call for a cpufeature/errata is called using on_each_cpu(). This issues a cross-call IPI to get the work done. Implicitly, this stashes the running PSTATE in SPSR when the CPU receives the IPI, and restores it when we return. This means an enable() call can never modify PSTATE. To allow PAN to do this, change the on_each_cpu() call to use stop_machine(). This schedules the work on each CPU which allows us to modify PSTATE. This involves changing the protype of all the enable() functions. enable_cpu_capabilities() is called during boot and enables the feature on all online CPUs. This path now uses stop_machine(). CPU features for hotplug'd CPUs are enabled by verify_local_cpu_features() which only acts on the local CPU, and can already modify the running PSTATE as it is called from secondary_start_kernel(). Reported-by: NTony Thompson <anthony.thompson@arm.com> Reported-by: NVladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: NJames Morse <james.morse@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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由 Andre Przywara 提交于
Commit 7dd01aef ("arm64: trap userspace "dc cvau" cache operation on errata-affected core") adds code to execute cache maintenance instructions in the kernel on behalf of userland on CPUs with certain ARM CPU errata. It turns out that the address hasn't been checked to be a valid user space address, allowing userland to clean cache lines in kernel space. Fix this by introducing an address check before executing the instructions on behalf of userland. Since the address doesn't come via a syscall parameter, we can't just reject tagged pointers and instead have to remove the tag when checking against the user address limit. Cc: <stable@vger.kernel.org> Fixes: 7dd01aef ("arm64: trap userspace "dc cvau" cache operation on errata-affected core") Reported-by: NKristina Martsenko <kristina.martsenko@arm.com> Signed-off-by: NAndre Przywara <andre.przywara@arm.com> [will: rework commit message + replace access_ok with max_user_addr()] Signed-off-by: NWill Deacon <will.deacon@arm.com>
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由 Stefan Agner 提交于
The pixel clock should not be on if the CRTC is not in use, hence move clock enable/disable calls into CRTC callbacks. Signed-off-by: NStefan Agner <stefan@agner.ch> Tested-By: NMeng Yi <meng.yi@nxp.com>
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由 Stefan Agner 提交于
Do not schedule a transfer of mode settings early. Modes should get applied on on CRTC enable where we also enable the pixel clock. Signed-off-by: NStefan Agner <stefan@agner.ch> Tested-By: NMeng Yi <meng.yi@nxp.com>
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由 Stefan Agner 提交于
There is no need to explicitly initiate a register transfer and turn off the DCU after initializing the plane registers. In fact, this is harmful and leads to unnecessary flickers if the DCU has been left on by the bootloader. Signed-off-by: NStefan Agner <stefan@agner.ch> Tested-By: NMeng Yi <meng.yi@nxp.com>
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由 Stefan Agner 提交于
Do not use encoder disable/enable callbacks to control bypass mode as this seems to mess with the signals not liked by displays. This also makes more sense since the encoder is already defined to be parallel RGB/LVDS at creation time. Signed-off-by: NStefan Agner <stefan@agner.ch> Tested-By: NMeng Yi <meng.yi@nxp.com>
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由 Linus Torvalds 提交于
Merge tag 'platform-drivers-x86-v4.9-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86 Pull x86 platform driver fixes from Darren Hart: "Fix a Kconfig issue leading potential link failure, and add a DMI match for an existing quirk. asus-wmi: - add SERIO_I8042 dependency ideapad-laptop: - Add Lenovo Yoga 910-13IKB to no_hw_rfkill dmi list" * tag 'platform-drivers-x86-v4.9-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: platform/x86: asus-wmi: add SERIO_I8042 dependency platform/x86: ideapad-laptop: Add Lenovo Yoga 910-13IKB to no_hw_rfkill dmi list
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git://git.libc.org/linux-sh由 Linus Torvalds 提交于
Pull arch/sh updates from Rich Felker: "Minor changes to improve J2 support and match Kconfig expectations of other subsystems" * tag 'sh-for-4.9' of git://git.libc.org/linux-sh: sh: add earlycon support to j2_defconfig sh: add Kconfig option for J-Core SoC core drivers sh: support CPU_J2 when compiler lacks -mj2
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Reviewed-by: NJay Freyensee <james_p_freyensee@linux.intel.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Reviewed-by: NKeith Busch <keith.busch@intel.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
Ported over from nvme-cli. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Reviewed-by: NKeith Busch <keith.busch@intel.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
This makes life easier for nvme-cli and we don't really need the uuid type anyway to start with. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Reviewed-by: NJay Freyensee <james_p_freyensee@linux.intel.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
Import a few updates to nvme.h from nvme-cli. This mostly includes a few new fields and error codes, but also a few renames that so far are only used in user space. Also one field is moved from an array of two le64 values to one of 16 u8 values so that we can more easily access it. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NKeith Busch <keith.busch@intel.com> Reviewed-by: NGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Gabriel Krisman Bertazi 提交于
NVMe 1.2.1 specification adds a tertiary element to the version number. This updates the macro and its callers to include the final number and fixup a single place in nvmet where the version was generated manually. Signed-off-by: NGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Reviewed-by: NSagi Grimberg <sagi@grimberg.me> Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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