- 08 Dec, 2019 1 commit
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git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds authored
Pull NFS client updates from Trond Myklebust: "Highlights include: Features: - NFSv4.2 now supports cross device offloaded copy (i.e. offloaded copy of a file from one source server to a different target server). - New RDMA tracepoints for debugging congestion control and Local Invalidate WRs. Bugfixes and cleanups - Drop the NFSv4.1 session slot if nfs4_delegreturn_prepare waits for layoutreturn - Handle bad/dead sessions correctly in nfs41_sequence_process() - Various bugfixes to the delegation return operation. - Various bugfixes pertaining to delegations that have been revoked. - Cleanups to the NFS timespec code to avoid unnecessary conversions between timespec and timespec64. - Fix unstable RDMA connections after a reconnect - Close race between waking an RDMA sender and posting a receive - Wake pending RDMA tasks if connection fails - Fix MR list corruption, and clean up MR usage - Fix another RPCSEC_GSS issue with MIC buffer space" * tag 'nfs-for-5.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (79 commits) SUNRPC: Capture completion of all RPC tasks SUNRPC: Fix another issue with MIC buffer space NFS4: Trace lock reclaims NFS4: Trace state recovery operation NFSv4.2 fix memory leak in nfs42_ssc_open NFSv4.2 fix kfree in __nfs42_copy_file_range NFS: remove duplicated include from nfs4file.c NFSv4: Make _nfs42_proc_copy_notify() static NFS: Fallocate should use the nfs4_fattr_bitmap NFS: Return -ETXTBSY when attempting to write to a swapfile fs: nfs: sysfs: Remove NULL check before kfree NFS: remove unneeded semicolon NFSv4: add declaration of current_stateid NFSv4.x: Drop the slot if nfs4_delegreturn_prepare waits for layoutreturn NFSv4.x: Handle bad/dead sessions correctly in nfs41_sequence_process() nfsv4: Move NFSPROC4_CLNT_COPY_NOTIFY to end of list SUNRPC: Avoid RPC delays when exiting suspend NFS: Add a tracepoint in nfs_fh_to_dentry() NFSv4: Don't retry the GETATTR on old stateid in nfs4_delegreturn_done() NFSv4: Handle NFS4ERR_OLD_STATEID in delegreturn ...
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- 07 Dec, 2019 19 commits
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git://github.com/awilliam/linux-vfioLinus Torvalds authored
Pull VFIO updates from Alex Williamson: - Remove hugepage checks for reserved pfns (Ben Luo) - Fix irq-bypass unregister ordering (Jiang Yi) * tag 'vfio-v5.5-rc1' of git://github.com/awilliam/linux-vfio: vfio/pci: call irq_bypass_unregister_producer() before freeing irq vfio/type1: remove hugepage checks in is_invalid_reserved_pfn()
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tipLinus Torvalds authored
Pull more xen updates from Juergen Gross: - a patch to fix a build warning - a cleanup of no longer needed code in the Xen event handling - a small series for the Xen grant driver avoiding high order allocations and replacing an insane global limit by a per-call one - a small series fixing Xen frontend/backend module referencing * tag 'for-linus-5.5b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen-blkback: allow module to be cleanly unloaded xen/xenbus: reference count registered modules xen/gntdev: switch from kcalloc() to kvcalloc() xen/gntdev: replace global limit of mapped pages by limit per call xen/gntdev: remove redundant non-zero check on ret xen/events: remove event handling recursion detection
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Linus Torvalds authored
Merge misc Kconfig updates from Andrew Morton: "A number of changes to Kconfig files under lib/ from Changbin Du and Krzysztof Kozlowski" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: lib/: fix Kconfig indentation kernel-hacking: move DEBUG_FS to 'Generic Kernel Debugging Instruments' kernel-hacking: move DEBUG_BUGVERBOSE to 'printk and dmesg options' kernel-hacking: create a submenu for scheduler debugging options kernel-hacking: move SCHED_STACK_END_CHECK after DEBUG_STACK_USAGE kernel-hacking: move Oops into 'Lockups and Hangs' kernel-hacking: move kernel testing and coverage options to same submenu kernel-hacking: group kernel data structures debugging together kernel-hacking: create submenu for arch special debugging options kernel-hacking: group sysrq/kgdb/ubsan into 'Generic Kernel Debugging Instruments'
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Linus Torvalds authored
pipe_wait() may be simple, but since it relies on the pipe lock, it means that we have to do the wakeup while holding the lock. That's unfortunate, because the very first thing the waked entity will want to do is to get the pipe lock for itself. So get rid of the pipe_wait() usage by simply releasing the pipe lock, doing the wakeup (if required) and then using wait_event_interruptible() to wait on the right condition instead. wait_event_interruptible() handles races on its own by comparing the wakeup condition before and after adding itself to the wait queue, so you can use an optimistic unlocked condition for it. Cc: David Howells <dhowells@redhat.com> Signed-off-by:Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
This code is ancient, and goes back to when we only had a single page for the pipe buffers. The exact history is hidden in the mists of time (ie "before git", and in fact predates the BK repository too). At that long-ago point in time, it actually helped to try to merge big back-and-forth pipe reads and writes, and not limit pipe reads to the single pipe buffer in length just because that was all we had at a time. However, since then we've expanded the pipe buffers to multiple pages, and this logic really doesn't seem to make sense. And a lot of it is somewhat questionable (ie "hmm, the user asked for a non-blocking read, but we see that there's a writer pending, so let's wait anyway to get the extra data that the writer will have"). But more importantly, it makes the "go to sleep" logic much less obvious, and considering the wakeup issues we've had, I want to make for less of those kinds of things. Cc: David Howells <dhowells@redhat.com> Signed-off-by: -
Linus Torvalds authored
This is the read side version of the previous commit: it simplifies the logic to only wake up waiting writers when necessary, and makes sure to use a synchronous wakeup. This time not so much for GNU make jobserver reasons (that pipe never fills up), but simply to get the writer going quickly again. A bit less verbose commentary this time, if only because I assume that the write side commentary isn't going to be ignored if you touch this code. Cc: David Howells <dhowells@redhat.com> Signed-off-by: -
Linus Torvalds authored
The pipe rework ends up having been extra painful, partly becaused of actual bugs with ordering and caching of the pipe state, but also because of subtle performance issues. In particular, the pipe rework caused the kernel build to inexplicably slow down. The reason turns out to be that the GNU make jobserver (which limits the parallelism of the build) uses a pipe to implement a "token" system: a parallel submake will read a character from the pipe to get the job token before starting a new job, and will write a character back to the pipe when it is done. The overall job limit is thus easily controlled by just writing the appropriate number of initial token characters into the pipe. But to work well, that really means that the old behavior of write wakeups being synchronous (WF_SYNC) is very important - when the pipe writer wakes up a reader, we want the reader to actually get scheduled immediately. Otherwise you lose the parallelism of the build. The pipe rework lost that synchronous wakeup on write, and we had clearly all forgotten the reasons and rules for it. This rewrites the pipe write wakeup logic to do the required Wsync wakeups, but also clarifies the logic and avoids extraneous wakeups. It also ends up addign a number of comments about what oit does and why, so that we hopefully don't end up forgetting about this next time we change this code. Cc: David Howells <dhowells@redhat.com> Signed-off-by: -
Krzysztof Kozlowski authored
Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ / /' -i */Kconfig Link: http://lkml.kernel.org/r/20191120140140.19148-1-krzk@kernel.orgSigned-off-by:
Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Changbin Du authored
DEBUG_FS does not belong to 'Compile-time checks and compiler options'. Link: http://lkml.kernel.org/r/20190909144453.3520-10-changbin.du@gmail.com Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
Changbin Du <changbin.du@gmail.com> Acked-by:
Randy Dunlap <rdunlap@infradead.org> Tested-by:
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Changbin Du authored
I think DEBUG_BUGVERBOSE is a dmesg option which gives more debug info to dmesg. Link: http://lkml.kernel.org/r/20190909144453.3520-9-changbin.du@gmail.comSigned-off-by:
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Changbin Du authored
Create a submenu 'Scheduler Debugging' for scheduler debugging options. Link: http://lkml.kernel.org/r/20190909144453.3520-8-changbin.du@gmail.comSigned-off-by:
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Changbin Du authored
They are both memory debug options to debug kernel stack issues. Link: http://lkml.kernel.org/r/20190909144453.3520-7-changbin.du@gmail.comSigned-off-by:
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Changbin Du authored
They are similar options so place them together. Link: http://lkml.kernel.org/r/20190909144453.3520-6-changbin.du@gmail.comSigned-off-by:
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Changbin Du authored
Move error injection, coverage, testing options to a new top level submenu 'Kernel Testing and Coverage'. They are all for test purpose. Link: http://lkml.kernel.org/r/20190909144453.3520-5-changbin.du@gmail.comSigned-off-by:
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Changbin Du authored
Group these similar runtime data structures verification options together. Link: http://lkml.kernel.org/r/20190909144453.3520-4-changbin.du@gmail.comSigned-off-by:
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Changbin Du authored
The arch special options are a little long, so create a submenu for them. Link: http://lkml.kernel.org/r/20190909144453.3520-3-changbin.du@gmail.comSigned-off-by:
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Changbin Du authored
Patch series "hacking: make 'kernel hacking' menu better structurized", v3. This series is a trivial improvment for the layout of 'kernel hacking' configuration menu. Now we have many items in it which makes takes a little time to look up them since they are not well structurized yet. Early discussion is here: https://lkml.org/lkml/2019/9/1/39 This patch (of 9): Group generic kernel debugging instruments sysrq/kgdb/ubsan together into a new submenu. Link: http://lkml.kernel.org/r/20190909144453.3520-2-changbin.du@gmail.comSigned-off-by:
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Linus Torvalds authored
The kernel wait queues have a basic rule to them: you add yourself to the wait-queue first, and then you check the things that you're going to wait on. That avoids the races with the event you're waiting for. The same goes for poll/select logic: the "poll_wait()" goes first, and then you check the things you're polling for. Of course, if you use locking, the ordering doesn't matter since the lock will serialize with anything that changes the state you're looking at. That's not the case here, though. So move the poll_wait() first in pipe_poll(), before you start looking at the pipe state. Fixes: 8cefc107 ("pipe: Use head and tail pointers for the ring, not cursor and length") Cc: David Howells <dhowells@redhat.com> Signed-off-by:
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git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds authored
Pull ARM fixes from Russell King: - fix CPU topology setup for SCHED_MC case - fix VDSO regression * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 8947/1: Fix __arch_get_hw_counter() access to CNTVCT ARM: 8943/1: Fix topology setup in case of CPU hotplug for CONFIG_SCHED_MC
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- 06 Dec, 2019 20 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/socLinus Torvalds authored
Pull ARM SoC fixes from Olof Johansson: "A set of fixes that we've merged late, but for the most part that have been sitting in -next for a while through platform maintainer trees: - Fixes to suspend/resume on Tegra, caused by the added features this merge window - Cleanups and minor fixes to TI additions this merge window - Tee fixes queued up late before the merge window, included here. - A handful of other fixlets There's also a refresh of the shareed config files (multi_v* on 32-bit, and defconfig on 64-bit), to avoid conflicts when we get new contributions" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (32 commits) ARM: multi_v7_defconfig: Restore debugfs support ARM: defconfig: re-run savedefconfig on multi_v* configs arm64: defconfig: re-run savedefconfig ARM: pxa: Fix resource properties soc: mediatek: cmdq: fixup wrong input order of write api soc: aspeed: Fix snoop_file_poll()'s return type MAINTAINERS: Switch to Marvell addresses MAINTAINERS: update Cavium ThunderX drivers Revert "arm64: dts: juno: add dma-ranges property" MAINTAINERS: Make Nicolas Saenz Julienne the new bcm2835 maintainer firmware: arm_scmi: Avoid double free in error flow arm64: dts: juno: Fix UART frequency ARM: dts: Fix sgx sysconfig register for omap4 arm: socfpga: execute cold reboot by default ARM: dts: Fix vcsi regulator to be always-on for droid4 to prevent hangs ARM: dts: dra7: fix cpsw mdio fck clock ARM: dts: am57xx-beagle-x15: Update pinmux name to ddr_3_3v ARM: dts: omap3-tao3530: Fix incorrect MMC card detection GPIO polarity soc/tegra: pmc: Add reset sources and levels on Tegra194 soc/tegra: pmc: Add missing IRQ callbacks on Tegra194 ... -
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds authored
Pull arm64 fixes from Catalin Marinas: - ZONE_DMA32 initialisation fix when memblocks fall entirely within the first GB (used by ZONE_DMA in 5.5 for Raspberry Pi 4). - Couple of ftrace fixes following the FTRACE_WITH_REGS patchset. - access_ok() fix for the Tagged Address ABI when called from from a kernel thread (asynchronous I/O): the kthread does not have the TIF flags of the mm owner, so untag the user address unconditionally. - KVM compute_layout() called before the alternatives code patching. - Minor clean-ups. * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: entry: refine comment of stack overflow check arm64: ftrace: fix ifdeffery arm64: KVM: Invoke compute_layout() before alternatives are applied arm64: Validate tagged addresses in access_ok() called from kernel threads arm64: mm: Fix column alignment for UXN in kernel_page_tables arm64: insn: consistently handle exit text arm64: mm: Fix initialisation of DMA zones on non-NUMA systems
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David Howells authored
Fix the iteration end check in fuse_dev_splice_write(). The iterator position can only be compared with == or != since wrappage may be involved. Fixes: 8cefc107 ("pipe: Use head and tail pointers for the ring, not cursor and length") Reported-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull more powerpc updates from Michael Ellerman: "A few commits splitting the KASAN instrumented bitops header in three, to match the split of the asm-generic bitops headers. This is needed on powerpc because we use the generic bitops for the non-atomic case only, whereas the existing KASAN instrumented bitops assume all the underlying operations are provided by the arch as arch_foo() versions. Thanks to: Daniel Axtens & Christophe Leroy" * tag 'powerpc-5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: docs/core-api: Remove possibly confusing sub-headings from Bit Operations powerpc: support KASAN instrumentation of bitops kasan: support instrumented bitops combined with generic bitops
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "One fix for a regression introduced by our recent rework of cache flushing on memory hotunplug. Like several other arches, our VDSO clock_getres() needed a fix to match the semantics of posix_get_hrtimer_res(). A fix for a boot crash on Power9 LPARs using PCI LSI interrupts. A commit disabling use of the trace_imc PMU (not the core PMU) on Power9 systems, because it can lead to checkstops, until a workaround is developed. A handful of other minor fixes. Thanks to: Aneesh Kumar K.V, Anju T Sudhakar, Ard Biesheuvel, Christophe Leroy, Cédric Le Goater, Madhavan Srinivasan, Vincenzo Frascino" * tag 'powerpc-5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/perf: Disable trace_imc pmu powerpc/powernv: Avoid re-registration of imc debugfs directory powerpc/pmem: Convert to EXPORT_SYMBOL_GPL powerpc/archrandom: fix arch_get_random_seed_int() powerpc: Fix vDSO clock_getres() powerpc/pmem: Fix kernel crash due to wrong range value usage in flush_dcache_range powerpc/xive: Skip ioremap() of ESB pages for LSI interrupts powerpc/kasan: Fix boot failure with RELOCATABLE && FSL_BOOKE
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/soundLinus Torvalds authored
Pull more sound updates from Takashi Iwai: "A few last-minute updates, most of them are the regression fixes: - AMD HD-audio HDMI runtime PM improvements - Fixes for HD-audio HDMI regressions wrt DP-MST - A regression fix for the previous aloop enhancement - A fix for a long-time problem in PCM OSS layer that was spotted by fuzzer now - A few HD-audio quirks" * tag 'sound-fix-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: pcm: oss: Avoid potential buffer overflows ALSA: hda: hdmi - Keep old slot assignment behavior for Intel platforms ALSA: hda: Modify stream stripe mask only when needed ALSA: hda - fixup for the bass speaker on Lenovo Carbon X1 7th gen ALSA: hda: hdmi - preserve non-MST PCM routing for Intel platforms ALSA: hda: hdmi - fix kernel oops caused by invalid PCM idx ALSA: hda/realtek - Fix inverted bass GPIO pin on Acer 8951G ALSA: hda/realtek - Dell headphone has noise on unmute for ALC236 ALSA: hda: hdmi - fix regression in connect list handling ALSA: aloop: Avoid pointer dereference before null-check ALSA: hda/hdmi - enable automatic runtime pm for AMD HDMI codecs by default ALSA: hda/hdmi - enable runtime pm for newer AMD display audio ALSA: hda/hdmi - Add new pci ids for AMD GPU display audio ALSA: hda/hdmi - fix vgaswitcheroo detection for AMD -
Linus Torvalds authored
Similarly to commit 8f868d68 ("pipe: Fix missing mask update after pipe_wait()") this fixes a case where the pipe rewrite ended up caching the pipe state incorrectly over a pipe lock drop event. It wasn't quite as obvious, because you needed to splice data from a pipe to a file, which is a fairly unusual operation, but it's completely wrong. Make sure we load the pipe head/tail/size information only after we've waited for there to be data in the pipe. While in that file, also make one of the splice helper functions use the canonical arghument order for pipe_empty(). That's syntactic - pipe emptiness is just that head and tail are equal, and thus mixing up head and tail doesn't really matter. It's still wrong, though. Reported-by:
David Sterba <dsterba@suse.cz> Cc: David Howells <dhowells@redhat.com> Signed-off-by:
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git://anongit.freedesktop.org/drm/drmLinus Torvalds authored
Pull more drm updates from Dave Airlie: "Rob pointed out I missed his pull request for msm-next, it's been in next for a while outside of my tree so shouldn't cause any unexpected issues, it has some OCMEM support in drivers/soc that is acked by other maintainers as it's outside my tree. Otherwise it's a usual fixes pull, i915, amdgpu, the main ones, with some tegra, omap, mgag200 and one core fix. Summary: msm-next: - OCMEM support for a3xx and a4xx GPUs. - a510 support + display support core: - mst payload deletion fix i915: - uapi alignment fix - fix for power usage regression due to security fixes - change default preemption timeout to 640ms from 100ms - EHL voltage level display fixes - TGL DGL PHY fix - gvt - MI_ATOMIC cmd parser fix, CFL non-priv warning - CI spotted deadlock fix - EHL port D programming fix amdgpu: - VRAM lost fixes on BACO for CI/VI - navi14 DC fixes - misc SR-IOV, gfx10 fixes - XGMI fixes for arcturus - SRIOV fixes amdkfd: - KFD on ppc64le enabled - page table optimisations radeon: - fix for r1xx/2xx register checker. tegra: - displayport regression fixes - DMA API regression fixes mgag200: - fix devices that can't scanout except at 0 addr omap: - fix dma_addr refcounting" * tag 'drm-next-2019-12-06' of git://anongit.freedesktop.org/drm/drm: (100 commits) drm/dp_mst: Correct the bug in drm_dp_update_payload_part1() drm/omap: fix dma_addr refcounting drm/tegra: Run hub cleanup on ->remove() drm/tegra: sor: Make the +5V HDMI supply optional drm/tegra: Silence expected errors on IOMMU attach drm/tegra: vic: Export module device table drm/tegra: sor: Implement system suspend/resume drm/tegra: Use proper IOVA address for cursor image drm/tegra: gem: Remove premature import restrictions drm/tegra: gem: Properly pin imported buffers drm/tegra: hub: Remove bogus connection mutex check ia64: agp: Replace empty define with do while agp: Add bridge parameter documentation agp: remove unused variable num_segments agp: move AGPGART_MINOR to include/linux/miscdevice.h agp: remove unused variable size in agp_generic_create_gatt_table drm/dp_mst: Fix build on systems with STACKTRACE_SUPPORT=n drm/radeon: fix r1xx/r2xx register checker for POT textures drm/amdgpu: fix GFX10 missing CSIB set(v3) drm/amdgpu: should stop GFX ring in hw_fini ...
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull more block and io_uring updates from Jens Axboe: "I wasn't expecting this to be so big, and if I was, I would have used separate branches for this. Going forward I'll be doing separate branches for the current tree, just like for the next kernel version tree. In any case, this contains: - Series from Christoph that fixes an inherent race condition with zoned devices and revalidation. - null_blk zone size fix (Damien) - Fix for a regression in this merge window that caused busy spins by sending empty disk uevents (Eric) - Fix for a regression in this merge window for bfq stats (Hou) - Fix for io_uring creds allocation failure handling (me) - io_uring -ERESTARTSYS send/recvmsg fix (me) - Series that fixes the need for applications to retain state across async request punts for io_uring. This one is a bit larger than I would have hoped, but I think it's important we get this fixed for 5.5. - connect(2) improvement for io_uring, handling EINPROGRESS instead of having applications needing to poll for it (me) - Have io_uring use a hash for poll requests instead of an rbtree. This turned out to work much better in practice, so I think we should make the switch now. For some workloads, even with a fair amount of cancellations, the insertion sort is just too expensive. (me) - Various little io_uring fixes (me, Jackie, Pavel, LimingWu) - Fix for brd unaligned IO, and a warning for the future (Ming) - Fix for a bio integrity data leak (Justin) - bvec_iter_advance() improvement (Pavel) - Xen blkback page unmap fix (SeongJae) The major items in here are all well tested, and on the liburing side we continue to add regression and feature test cases. We're up to 50 topic cases now, each with anywhere from 1 to more than 10 cases in each" * tag 'for-linus-20191205' of git://git.kernel.dk/linux-block: (33 commits) block: fix memleak of bio integrity data io_uring: fix a typo in a comment bfq-iosched: Ensure bio->bi_blkg is valid before using it io_uring: hook all linked requests via link_list io_uring: fix error handling in io_queue_link_head io_uring: use hash table for poll command lookups io-wq: clear node->next on list deletion io_uring: ensure deferred timeouts copy necessary data io_uring: allow IO_SQE_* flags on IORING_OP_TIMEOUT null_blk: remove unused variable warning on !CONFIG_BLK_DEV_ZONED brd: warn on un-aligned buffer brd: remove max_hw_sectors queue limit xen/blkback: Avoid unmapping unmapped grant pages io_uring: handle connect -EINPROGRESS like -EAGAIN block: set the zone size in blk_revalidate_disk_zones atomically block: don't handle bio based drivers in blk_revalidate_disk_zones block: allocate the zone bitmaps lazily block: replace seq_zones_bitmap with conv_zones_bitmap block: simplify blkdev_nr_zones block: remove the empty line at the end of blk-zoned.c ... -
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull vfs d_inode/d_flags memory ordering fixes from Al Viro: "Fallout from tree-wide audit for ->d_inode/->d_flags barriers use. Basically, the problem is that negative pinned dentries require careful treatment - unless ->d_lock is locked or parent is held at least shared, another thread can make them positive right under us. Most of the uses turned out to be safe - the main surprises as far as filesystems are concerned were - race in dget_parent() fastpath, that might end up with the caller observing the returned dentry _negative_, due to insufficient barriers. It is positive in memory, but we could end up seeing the wrong value of ->d_inode in CPU cache. Fixed. - manual checks that result of lookup_one_len_unlocked() is positive (and rejection of negatives). Again, insufficient barriers (we might end up with inconsistent observed values of ->d_inode and ->d_flags). Fixed by switching to a new primitive that does the checks itself and returns ERR_PTR(-ENOENT) instead of a negative dentry. That way we get rid of boilerplate converting negatives into ERR_PTR(-ENOENT) in the callers and have a single place to deal with the barrier-related mess - inside fs/namei.c rather than in every caller out there. The guts of pathname resolution *do* need to be careful - the race found by Ritesh is real, as well as several similar races. Fortunately, it turns out that we can take care of that with fairly local changes in there. The tree-wide audit had not been fun, and I hate the idea of repeating it. I think the right approach would be to annotate the places where we are _not_ guaranteed ->d_inode/->d_flags stability and have sparse catch regressions. But I'm still not sure what would be the least invasive way of doing that and it's clearly the next cycle fodder" * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs/namei.c: fix missing barriers when checking positivity fix dget_parent() fastpath race new helper: lookup_positive_unlocked() fs/namei.c: pull positivity check into follow_managed() -
https://github.com/Broadcom/stblinuxOlof Johansson authored
This pull request contains the second batch of changes for Broadcom ARM-based SoCs, please pull the following: - Nicolas declares a CMA area within the first 1GB of DRAM in order for it to be guaranteed to reside there, otherwise ARM64's memory initialization will pick up a CMA area within ZONE_DMA32 - Stefan adds the Device Tree node for the built-in Ethernet controller (GENET) on the Raspberry Pi 4 model B board * tag 'arm-soc/for-5.5/devicetree-part2' of https://github.com/Broadcom/stblinux: ARM: dts: bcm2711-rpi-4: Enable GENET support ARM: dts: bcm2711: force CMA into first GB of memory Link: https://lore.kernel.org/r/20191118182931.11884-1-f.fainelli@gmail.comSigned-off-by:
Olof Johansson <olof@lixom.net>
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Olof Johansson authored
Merge tag 'tegra-for-5.5-memory-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/fixes memory: tegra: Fixes for v5.5-rc1 This contains a fix for a kernel panic that can occur on suspend if EMC timings are not available in device tree. * tag 'tegra-for-5.5-memory-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: memory: tegra30-emc: Fix panic on suspend Link: https://lore.kernel.org/r/20191204130753.3614278-1-thierry.reding@gmail.comSigned-off-by:
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Olof Johansson authored
Merge tag 'tegra-for-5.5-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/fixes soc/tegra: Fixes for v5.5-rc1 Fixes a regression for wake events on Tegra194 caused by the Tegra210 support that was added in v5.5-rc1 as well as wrong reset sources and levels on Tegra194. * tag 'tegra-for-5.5-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: soc/tegra: pmc: Add reset sources and levels on Tegra194 soc/tegra: pmc: Add missing IRQ callbacks on Tegra194 soc/tegra: pmc: Use lower-case for hexadecimal literals Link: https://lore.kernel.org/r/20191204130753.3614278-2-thierry.reding@gmail.comSigned-off-by:
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Olof Johansson authored
Merge tag 'tegra-for-5.5-cpufreq' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/fixes cpufreq: tegra: Changes for v5.5-rc1 Implements support for suspend/resume on Tegra124. * tag 'tegra-for-5.5-cpufreq' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: cpufreq: tegra124: Add suspend and resume support Link: https://lore.kernel.org/r/20191204130753.3614278-3-thierry.reding@gmail.comSigned-off-by:
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Olof Johansson authored
Merge tag 'socfpga_update_for_v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux into arm/fixes SoCFPGA updates for v5.5 - Issue COLD reboot by default for SoCFPGA platforms * tag 'socfpga_update_for_v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux: arm: socfpga: execute cold reboot by default Link: https://lore.kernel.org/r/20191122182106.822-1-dinguyen@kernel.orgSigned-off-by:
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Olof Johansson authored
Merge tag 'omap-for-v5.5/dt-fixes-merge-window-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes Device tree fixes for omap variants for for v5.5 merge window This series of changes contains fixes for few SoC and board specific issues that would be good to have merged for v5.5-rc1: - Fix incorrect MMC card detection polarity for omap3-tao3530 - Fix wrong am57xx-beagle-x15 pinmux named states for eMMC - Fix dra7 cpsw mdio clock that causes wrong speed - Fix vcsi for droid4 so it won't get turned off after init - Fix rev and sysconfig register offsets for omap4 sgx so it can idle Then there are also two minor late changes to logicpd-torpedo-baseboard to configure 1-wire HDQ for battery stats, and remove out of date workaround comments no longer needed. * tag 'omap-for-v5.5/dt-fixes-merge-window-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: dts: Fix sgx sysconfig register for omap4 ARM: dts: Fix vcsi regulator to be always-on for droid4 to prevent hangs ARM: dts: dra7: fix cpsw mdio fck clock ARM: dts: am57xx-beagle-x15: Update pinmux name to ddr_3_3v ARM: dts: omap3-tao3530: Fix incorrect MMC card detection GPIO polarity ARM: dts: logicpd-torpedo: Remove unnecessary notes/comments ARM: dts: logicpd-torpedo-baseboard: Enable HDQ Link: https://lore.kernel.org/r/pull-1574870758-237468@atomide.comSigned-off-by:
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Olof Johansson authored
Merge tag 'omap-for-v5.5/ti-sysc-late-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes Few ti-sysc related fixes for v5.5 merge window Just few minor changes that can be merged when suitable, but would be good to have these in v5.5-rc1 to remove dependencies between branches for more changes later on in v5.6: - Add quirk handling for AESS (Audio Engine Sub System) - We want to drop the useless gptimer option for omap4 as there are local timers - A minor error path handling improvment for sysc_child_add_named_clock() that will make further patching a bit easier * tag 'omap-for-v5.5/ti-sysc-late-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: bus: ti-sysc: Adjust exception handling in sysc_child_add_named_clock() ARM: OMAP2+: Drop useless gptimer option for omap4 bus: ti-sysc: Add module enable quirk for audio AESS Link: https://lore.kernel.org/r/pull-1574273726-31367@atomide.comSigned-off-by:
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Commit fd7d58f0 ("ARM: multi_v7_defconfig: renormalize based on recent additions") removed explicit enable line for CONFIG_DEBUG_FS, because that feature has been selected by other enabled options: CONFIG_TRACING, which were enabled by CONFIG_PERF_EVENTS. In meantime, commit 0e4a459f ("tracing: Remove unnecessary DEBUG_FS dependency") removed the dependency between CONFIG_DEBUG_FS and CONFIG_TRACING, so CONFIG_DEBUG_FS is no longer enabled in default builds. Enable it again explicitly, as debugfs support is essential for various automated testing tools. Link: https://lore.kernel.org/r/20191206125112.11006-1-m.szyprowski@samsung.comSigned-off-by:
Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by:
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Heyi Guo authored
Stack overflow checking can be done by testing sp & (1 << THREAD_SHIFT) only for the stacks are aligned to (2 << THREAD_SHIFT) with size of (1 << THREAD_SIZE), and this is the case when CONFIG_VMAP_STACK is set. Fix the code comment to avoid confusion. Cc: Will Deacon <will@kernel.org> Acked-by:
Mark Rutland <mark.rutland@arm.com> Signed-off-by:
Heyi Guo <guoheyi@huawei.com> [catalin.marinas@arm.com: Updated comment following Mark's suggestion] Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com>
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Mark Rutland authored
When I tweaked the ftrace entry assembly in commit: 3b23e499 ("arm64: implement ftrace with regs") ... my ifdeffery tweaks left ftrace_graph_caller undefined for CONFIG_DYNAMIC_FTRACE && CONFIG_FUNCTION_GRAPH_TRACER when ftrace is based on mcount. The kbuild test robot reported that this issue is detected at link time: | arch/arm64/kernel/entry-ftrace.o: In function `skip_ftrace_call': | arch/arm64/kernel/entry-ftrace.S:238: undefined reference to `ftrace_graph_caller' | arch/arm64/kernel/entry-ftrace.S:238:(.text+0x3c): relocation truncated to fit: R_AARCH64_CONDBR19 against undefined symbol | `ftrace_graph_caller' | arch/arm64/kernel/entry-ftrace.S:243: undefined reference to `ftrace_graph_caller' | arch/arm64/kernel/entry-ftrace.S:243:(.text+0x54): relocation truncated to fit: R_AARCH64_CONDBR19 against undefined symbol | `ftrace_graph_caller' This patch fixes the ifdeffery so that the mcount version of ftrace_graph_caller doesn't depend on CONFIG_DYNAMIC_FTRACE. At the same time, a redundant #else is removed from the ifdeffery for the patchable-function-entry version of ftrace_graph_caller. Fixes: 3b23e499 ("arm64: implement ftrace with regs") Reported-by:
kbuild test robot <lkp@intel.com> Signed-off-by:
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