Commit Graph

839318 Commits

Author SHA1 Message Date
Jens Axboe
004d564f90 tools/io_uring: sync with liburing
Various fixes and changes have been applied to liburing since we
copied some select bits to the kernel testing/examples part, sync
up with liburing to get those changes.

Most notable is the change that split the CQE reading into the peek
and seen event, instead of being just a single function. Also fixes
an unsigned wrap issue in io_uring_submit(), leak of 'fd' in setup
if we fail, and various other little issues.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Jens Axboe
486f069253 tools/io_uring: fix Makefile for pthread library link
Currently fails with:

io_uring-bench.o: In function `main':
/home/axboe/git/linux-block/tools/io_uring/io_uring-bench.c:560: undefined reference to `pthread_create'
/home/axboe/git/linux-block/tools/io_uring/io_uring-bench.c:588: undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
Makefile:11: recipe for target 'io_uring-bench' failed
make: *** [io_uring-bench] Error 1

Move -lpthread to the end.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Bob Liu
7996a8b551 blk-mq: fix hang caused by freeze/unfreeze sequence
The following is a description of a hang in blk_mq_freeze_queue_wait().
The hang happens on attempt to freeze a queue while another task does
queue unfreeze.

The root cause is an incorrect sequence of percpu_ref_resurrect() and
percpu_ref_kill() and as a result those two can be swapped:

 CPU#0                         CPU#1
 ----------------              -----------------
 q1 = blk_mq_init_queue(shared_tags)

                                q2 = blk_mq_init_queue(shared_tags):
                                  blk_mq_add_queue_tag_set(shared_tags):
                                    blk_mq_update_tag_set_depth(shared_tags):
				     list_for_each_entry()
                                      blk_mq_freeze_queue(q1)
                                       > percpu_ref_kill()
                                       > blk_mq_freeze_queue_wait()

 blk_cleanup_queue(q1)
  blk_mq_freeze_queue(q1)
   > percpu_ref_kill()
                 ^^^^^^ freeze_depth can't guarantee the order

                                      blk_mq_unfreeze_queue()
                                        > percpu_ref_resurrect()

   > blk_mq_freeze_queue_wait()
                 ^^^^^^ Hang here!!!!

This wrong sequence raises kernel warning:
percpu_ref_kill_and_confirm called more than once on blk_queue_usage_counter_release!
WARNING: CPU: 0 PID: 11854 at lib/percpu-refcount.c:336 percpu_ref_kill_and_confirm+0x99/0xb0

But the most unpleasant effect is a hang of a blk_mq_freeze_queue_wait(),
which waits for a zero of a q_usage_counter, which never happens
because percpu-ref was reinited (instead of being killed) and stays in
PERCPU state forever.

How to reproduce:
 - "insmod null_blk.ko shared_tags=1 nr_devices=0 queue_mode=2"
 - cpu0: python Script.py 0; taskset the corresponding process running on cpu0
 - cpu1: python Script.py 1; taskset the corresponding process running on cpu1

 Script.py:
 ------
 #!/usr/bin/python3

import os
import sys

while True:
    on = "echo 1 > /sys/kernel/config/nullb/%s/power" % sys.argv[1]
    off = "echo 0 > /sys/kernel/config/nullb/%s/power" % sys.argv[1]
    os.system(on)
    os.system(off)
------

This bug was first reported and fixed by Roman, previous discussion:
[1] Message id: 1443287365-4244-7-git-send-email-akinobu.mita@gmail.com
[2] Message id: 1443563240-29306-6-git-send-email-tj@kernel.org
[3] https://patchwork.kernel.org/patch/9268199/

Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Roman Pen <roman.penyaev@profitbricks.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Christoph Hellwig
6869875fbc block: remove the bi_seg_{front,back}_size fields in struct bio
At this point these fields aren't used for anything, so we can remove
them.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Christoph Hellwig
200a9aff7b block: remove the segment size check in bio_will_gap
We fundamentally do not have a maximum segement size for devices with a
virt boundary.  So don't bother checking it, especially given that the
existing checks didn't properly work to start with as we never fully
update the front/back segment size and miss the bi_seg_front_size that
wuld have been required for some cases.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Christoph Hellwig
09324d32d2 block: force an unlimited segment size on queues with a virt boundary
We currently fail to update the front/back segment size in the bio when
deciding to allow an otherwise gappy segement to a device with a
virt boundary.  The reason why this did not cause problems is that
devices with a virt boundary fundamentally don't use segments as we
know it and thus don't care.  Make that assumption formal by forcing
an unlimited segement size in this case.

Fixes: f6970f83ef ("block: don't check if adjacent bvecs in one bio can be mergeable")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Christoph Hellwig
eded341c08 block: don't decrement nr_phys_segments for physically contigous segments
Currently ll_merge_requests_fn, unlike all other merge functions,
reduces nr_phys_segments by one if the last segment of the previous,
and the first segment of the next segement are contigous.  While this
seems like a nice solution to avoid building smaller than possible
requests it causes a mismatch between the segments actually present
in the request and those iterated over by the bvec iterators, including
__rq_for_each_bio.  This can for example mistrigger the single segment
optimization in the nvme-pci driver, and might lead to mismatching
nr_phys_segments number when recalculating the number of request
when inserting a cloned request.

We could possibly work around this by making the bvec iterators take
the front and back segment size into account, but that would require
moving them from the bio to the bio_iter and spreading this mess
over all users of bvecs.  Or we could simply remove this optimization
under the assumption that most users already build good enough bvecs,
and that the bio merge patch never cared about this optimization
either.  The latter is what this patch does.

dff824b2aa ("nvme-pci: optimize mapping of small single segment requests").
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Andrea Parri
a0934fd2b1 sbitmap: fix improper use of smp_mb__before_atomic()
This barrier only applies to the read-modify-write operations; in
particular, it does not apply to the atomic_set() primitive.

Replace the barrier with an smp_mb().

Fixes: 6c0ca7ae29 ("sbitmap: fix wakeup hang after sbq resize")
Cc: stable@vger.kernel.org
Reported-by: "Paul E. McKenney" <paulmck@linux.ibm.com>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: linux-block@vger.kernel.org
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Andrea Parri
f381c6a4bd bio: fix improper use of smp_mb__before_atomic()
This barrier only applies to the read-modify-write operations; in
particular, it does not apply to the atomic_set() primitive.

Replace the barrier with an smp_mb().

Fixes: dac56212e8 ("bio: skip atomic inc/dec of ->bi_cnt for most use cases")
Cc: stable@vger.kernel.org
Reported-by: "Paul E. McKenney" <paulmck@linux.ibm.com>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: linux-block@vger.kernel.org
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Ed Cashin
389468e76b aoe: list new maintainer for aoe driver
Justin Sanders, who has extensive experience with ATA over Ethernet
in general and AoE SCSI and block-device drivers in particular, is
ready to take on the role of aoe maintainer.  The driver needs a more
active maintainer.

Signed-off-by: Ed Cashin <ed.cashin@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-23 10:25:26 -06:00
Linus Torvalds
0ef0fd3515 * ARM: support for SVE and Pointer Authentication in guests, PMU improvements
* POWER: support for direct access to the POWER9 XIVE interrupt controller,
 memory and performance optimizations.
 
 * x86: support for accessing memory not backed by struct page, fixes and refactoring
 
 * Generic: dirty page tracking improvements
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "ARM:
   - support for SVE and Pointer Authentication in guests
   - PMU improvements

  POWER:
   - support for direct access to the POWER9 XIVE interrupt controller
   - memory and performance optimizations

  x86:
   - support for accessing memory not backed by struct page
   - fixes and refactoring

  Generic:
   - dirty page tracking improvements"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (155 commits)
  kvm: fix compilation on aarch64
  Revert "KVM: nVMX: Expose RDPMC-exiting only when guest supports PMU"
  kvm: x86: Fix L1TF mitigation for shadow MMU
  KVM: nVMX: Disable intercept for FS/GS base MSRs in vmcs02 when possible
  KVM: PPC: Book3S: Remove useless checks in 'release' method of KVM device
  KVM: PPC: Book3S HV: XIVE: Fix spelling mistake "acessing" -> "accessing"
  KVM: PPC: Book3S HV: Make sure to load LPID for radix VCPUs
  kvm: nVMX: Set nested_run_pending in vmx_set_nested_state after checks complete
  tests: kvm: Add tests for KVM_SET_NESTED_STATE
  KVM: nVMX: KVM_SET_NESTED_STATE - Tear down old EVMCS state before setting new state
  tests: kvm: Add tests for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_CPU_ID
  tests: kvm: Add tests to .gitignore
  KVM: Introduce KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2
  KVM: Fix kvm_clear_dirty_log_protect off-by-(minus-)one
  KVM: Fix the bitmap range to copy during clear dirty
  KVM: arm64: Fix ptrauth ID register masking logic
  KVM: x86: use direct accessors for RIP and RSP
  KVM: VMX: Use accessors for GPRs outside of dedicated caching logic
  KVM: x86: Omit caching logic for always-available GPRs
  kvm, x86: Properly check whether a pfn is an MMIO or not
  ...
2019-05-17 10:33:30 -07:00
Linus Torvalds
4489da7183 nds32 patches for 5.2-rc1
Here is the nds32 patchset based on 5.1
 Contained in here are
 1. Clean up codes and Makefile
 2. Fix a vDSO bug
 3. Remove useless functions/header files
 4. Update git repo path in MAINTAINERS
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Merge tag 'nds32-for-linus-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux

Pull nds32 updates from Greentime Hu:

 - Clean up codes and Makefile

 - Fix a vDSO bug

 - Remove useless functions/header files

 - Update git repo path in MAINTAINERS

* tag 'nds32-for-linus-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux:
  nds32: Fix vDSO clock_getres()
  MAINTAINERS: update nds32 git repo path
  nds32: don't export low-level cache flushing routines
  arch: nds32: Kconfig: pedantic formatting
  nds32: fix semicolon code style issue
  nds32: vdso: drop unnecessary cc-ldoption
  nds32: remove unused generic-y += cmpxchg-local.h
  nds32: Use the correct style for SPDX License Identifier
  nds32: remove __virt_to_bus and __bus_to_virt
  nds32: vdso: fix and clean-up Makefile
  nds32: add vmlinux.lds and vdso.so to .gitignore
  nds32: ex-exit: Remove unneeded need_resched() loop
  nds32/io: Remove useless definition of mmiowb()
  nds32: Removed unused thread flag TIF_USEDFPU
2019-05-17 10:17:29 -07:00
Linus Torvalds
80111bfb67 s390 updates for the 5.2 merge window #2
- Enhancements for the QDIO layer
 
  - Remove the RCP trace event
 
  - Avoid three build issues
 
  - Move the defconfig to the configs directory
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Merge tag 's390-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Martin Schwidefsky:

 - Enhancements for the QDIO layer

 - Remove the RCP trace event

 - Avoid three build issues

 - Move the defconfig to the configs directory

* tag 's390-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: move arch/s390/defconfig to arch/s390/configs/defconfig
  s390/qdio: optimize state inspection of HW-owned SBALs
  s390/qdio: use get_buf_state() in debug_get_buf_state()
  s390/qdio: allow to scan all Output SBALs in one go
  s390/cio: Remove tracing for rchp instruction
  s390/kasan: adapt disabled_wait usage to avoid build error
  latent_entropy: avoid build error when plugin cflags are not set
  s390/boot: fix compiler error due to missing awk strtonum
2019-05-17 10:08:59 -07:00
Linus Torvalds
bf8a9a4755 Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs mount updates from Al Viro:
 "Propagation of new syscalls to other architectures + cosmetic change
  from Christian (fscontext didn't follow the convention for anon inode
  names)"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  uapi: Wire up the mount API syscalls on non-x86 arches [ver #2]
  uapi, x86: Fix the syscall numbering of the mount API syscalls [ver #2]
  uapi, fsopen: use square brackets around "fscontext" [ver #2]
2019-05-17 09:46:31 -07:00
Paolo Bonzini
c011d23ba0 kvm: fix compilation on aarch64
Commit e45adf665a ("KVM: Introduce a new guest mapping API", 2019-01-31)
introduced a build failure on aarch64 defconfig:

$ make -j$(nproc) ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- O=out defconfig \
                Image.gz
...
../arch/arm64/kvm/../../../virt/kvm/kvm_main.c:
    In function '__kvm_map_gfn':
../arch/arm64/kvm/../../../virt/kvm/kvm_main.c:1763:9: error:
    implicit declaration of function 'memremap'; did you mean 'memset_p'?
../arch/arm64/kvm/../../../virt/kvm/kvm_main.c:1763:46: error:
    'MEMREMAP_WB' undeclared (first use in this function)
../arch/arm64/kvm/../../../virt/kvm/kvm_main.c:
    In function 'kvm_vcpu_unmap':
../arch/arm64/kvm/../../../virt/kvm/kvm_main.c:1795:3: error:
    implicit declaration of function 'memunmap'; did you mean 'vm_munmap'?

because these functions are declared in <linux/io.h> rather than <asm/io.h>,
and the former was being pulled in already on x86 but not on aarch64.

Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-05-17 14:08:53 +02:00
Linus Torvalds
a6a4b66bd8 for-linus-20190516
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Merge tag 'for-linus-20190516' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "A small set of fixes for io_uring.

  This contains:

   - smp_rmb() cleanup for io_cqring_events() (Jackie)

   - io_cqring_wait() simplification (Jackie)

   - removal of dead 'ev_flags' passing (me)

   - SQ poll CPU affinity verification fix (me)

   - SQ poll wait fix (Roman)

   - SQE command prep cleanup and fix (Stefan)"

* tag 'for-linus-20190516' of git://git.kernel.dk/linux-block:
  io_uring: use wait_event_interruptible for cq_wait conditional wait
  io_uring: adjust smp_rmb inside io_cqring_events
  io_uring: fix infinite wait in khread_park() on io_finish_async()
  io_uring: remove 'ev_flags' argument
  io_uring: fix failure to verify SQ_AFF cpu
  io_uring: fix race condition reading SQE data
2019-05-16 19:10:37 -07:00
Linus Torvalds
1718de78e6 for-5.2/block-post-20190516
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Merge tag 'for-5.2/block-post-20190516' of git://git.kernel.dk/linux-block

Pull more block updates from Jens Axboe:
 "This is mainly some late lightnvm changes that came in just before the
  merge window, as well as fixes that have been queued up since the
  initial pull request was frozen.

  This contains:

   - lightnvm changes, fixing race conditions, improving memory
     utilization, and improving pblk compatability (Chansol, Igor,
     Marcin)

   - NVMe pull request with minor fixes all over the map (via Christoph)

   - remove redundant error print in sata_rcar (Geert)

   - struct_size() cleanup (Jackie)

   - dasd CONFIG_LBADF warning fix (Ming)

   - brd cond_resched() improvement (Mikulas)"

* tag 'for-5.2/block-post-20190516' of git://git.kernel.dk/linux-block: (41 commits)
  block/bio-integrity: use struct_size() in kmalloc()
  nvme: validate cntlid during controller initialisation
  nvme: change locking for the per-subsystem controller list
  nvme: trace all async notice events
  nvme: fix typos in nvme status code values
  nvme-fabrics: remove unused argument
  nvme-multipath: avoid crash on invalid subsystem cntlid enumeration
  nvme-fc: use separate work queue to avoid warning
  nvme-rdma: remove redundant reference between ib_device and tagset
  nvme-pci: mark expected switch fall-through
  nvme-pci: add known admin effects to augument admin effects log page
  nvme-pci: init shadow doorbell after each reset
  brd: add cond_resched to brd_free_pages
  sata_rcar: Remove ata_host_alloc() error printing
  s390/dasd: fix build warning in dasd_eckd_build_cp_raw
  lightnvm: pblk: use nvm_rq_to_ppa_list()
  lightnvm: pblk: simplify partial read path
  lightnvm: do not remove instance under global lock
  lightnvm: track inflight target creations
  lightnvm: pblk: recover only written metadata
  ...
2019-05-16 19:08:15 -07:00
Linus Torvalds
815d469d8c One more patch to remove io.h from clk-provider.h. We used to need this
include when we had clk_readl() and clk_writel(), but those are gone now
 so this patch pushes the dependency out to the users of clk-provider.h.
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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull more clk framework updates from Stephen Boyd:
 "One more patch to remove io.h from clk-provider.h.

  We used to need this include when we had clk_readl() and clk_writel(),
  but those are gone now so this patch pushes the dependency out to the
  users of clk-provider.h"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: Remove io.h from clk-provider.h
2019-05-16 19:05:35 -07:00
Linus Torvalds
5f3ab27b9e Merge branch 'for-5.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo:
 "The cgroup2 freezer pulled in this cycle broke strace. This pull
  request includes a workaround for the problem.

  It's not a complete fix in that it may cause spurious frozen state
  flip-flops which is fairly minor. Will push a full fix once it's
  ready"

* 'for-5.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  signal: unconditionally leave the frozen state in ptrace_stop()
2019-05-16 19:01:23 -07:00
Linus Torvalds
4c7b63a32d linux-kselftest-5.2-rc1-2
This kselftest second update for Linux 5.2-rc1 consists of
 
 Kselftest framework fixes from Shuah Khan
 
 - kselftest framework bpf build/test workflow regression fix
 - Fix to kselftest install to use default install path
 - Fix to kselftest KBUILD_OUTPUT builds to not clutter main
   KBUILD_OUTPUT directory with selftest objects
 
 - .gitignore fixes from Kelsey Skunberg
 
 - rseq selftests updates from Mathieu Desnoyers and Martin Schwidefsky:
 
   They change the per-architecture pre-abort signatures to ensure those
   are valid trap instructions.
 
   The way exit points are presented to debuggers is enhanced, ensuring
   all exit points are present, so debuggers don't have to disassemble
   rseq critical section to properly skip over them.
 
   Discussions with the glibc community is reaching a consensus of exposing
   a __rseq_handled symbol from glibc to coexist with rseq early adopters.
   Update the rseq selftest code to expose and use this symbol.
 
   Support for compiling asm goto with clang is added with the
   "-no-integrated-as" compiler switch, similarly to the top level kernel
   Makefile.
 
 - kselftest Makefile test run output refactoring and making test
   output TAP13 compliant from Kees Cook:
 
   This re-factors the selftest Makefiles to extract the test running logic
   to be reused between "run_tests" and "emit_tests", while also fixing
   up the test output to be TAP version 13 compliant:
 	- added "plan" line
 	- fixed result line syntax
 	- moved all test output to be "# "-prefixed as TAP "diagnostic"
 	  lines
 
   The prefixing code includes a fallback mode for limited execution
   environments.
 
   Additionally, the plan lines are fixed for all callers of kselftest.h.
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Merge tag 'linux-kselftest-5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull more kselftest updates from Shuah Khan:

 - kselftest framework bpf build/test workflow regression fix

 - Fix to kselftest install to use default install path

 - Fix to kselftest KBUILD_OUTPUT builds to not clutter main
   KBUILD_OUTPUT directory with selftest objects

 - .gitignore fixes (Kelsey Skunberg)

 - rseq selftests updates (Mathieu Desnoyers and Martin Schwidefsky)

   They change the per-architecture pre-abort signatures to ensure those
   are valid trap instructions.

   The way exit points are presented to debuggers is enhanced, ensuring
   all exit points are present, so debuggers don't have to disassemble
   rseq critical section to properly skip over them.

   Discussions with the glibc community is reaching a consensus of
   exposing a __rseq_handled symbol from glibc to coexist with rseq
   early adopters. Update the rseq selftest code to expose and use this
   symbol.

   Support for compiling asm goto with clang is added with the
   "-no-integrated-as" compiler switch, similarly to the top level
   kernel Makefile.

 - kselftest Makefile test run output refactoring and making test output
   TAP13 compliant from Kees Cook:

   This re-factors the selftest Makefiles to extract the test running
   logic to be reused between "run_tests" and "emit_tests", while also
   fixing up the test output to be TAP version 13 compliant:
	- added "plan" line
	- fixed result line syntax
	- moved all test output to be "# "-prefixed as TAP "diagnostic"
	  lines

   The prefixing code includes a fallback mode for limited execution
   environments.

   Additionally, the plan lines are fixed for all callers of
   kselftest.h.

* tag 'linux-kselftest-5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (25 commits)
  selftests: avoid KBUILD_OUTPUT dir cluttering with selftest objects
  selftests: drivers: Create .gitignore to include /dma-buf/udmabuf
  selftests: pidfd: Create .gitignore to include pidfd_test
  selftests: fix bpf build/test workflow regression when KBUILD_OUTPUT is set
  selftests: fix install target to use default install path
  rseq/selftests: add -no-integrated-as for clang
  rseq/selftests: mips: use break instruction for RSEQ_SIG
  rseq/selftests: powerpc code signature: generate valid instructions
  rseq/selftests: aarch64 code signature: handle big-endian environment
  rseq/selftests: arm: use udf instruction for RSEQ_SIG
  rseq/selftests: s390: use trap4 for RSEQ_SIG
  rseq/selftests: x86: use ud1 instruction as RSEQ_SIG opcode
  rseq/selftests: s390: use jg instruction for jumps outside of the asm
  rseq/selftests: Use __rseq_handled symbol to coexist with glibc
  rseq/selftests: Introduce __rseq_cs_ptr_array, rename __rseq_table to __rseq_cs
  rseq/selftests: Add __rseq_exit_point_array section for debuggers
  rseq/selftests: x86: Work-around bogus gcc-8 optimisation
  selftests: Add test plan API to kselftest.h and adjust callers
  selftests: Remove KSFT_TAP_LEVEL
  selftests: Move test output to diagnostic lines
  ...
2019-05-16 18:57:58 -07:00
Linus Torvalds
9cbda1bddb Conversion of vendor-prefixes.txt to json-schema
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Merge tag 'devicetree-for-5.2-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull Devicetree vendor prefix conversion from Rob Herring:
 "Conversion of vendor-prefixes.txt to json-schema"

* tag 'devicetree-for-5.2-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: Convert vendor prefixes to json-schema
2019-05-16 18:54:13 -07:00
Linus Torvalds
0d74471924 AFS fixes
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Merge tag 'afs-fixes-b-20190516' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull AFS callback promise fixes from David Howells:
 "This series fixes a bunch of problems in callback promise handling,
  where a callback promise indicates a promise on the part of the server
  to notify the client in the event of some sort of change to a file or
  volume. In the event of a break, the client has to go and refetch the
  client status from the server and discard any cached permission
  information as the ACL might have changed.

  The problem in the current code is that changes made by other clients
  aren't always noticed, primarily because the file status information
  and the callback information aren't updated in the same critical
  section, even if these are carried in the same reply from an RPC
  operation, and so the AFS_VNODE_CB_PROMISED flag is unreliable.

  Arranging for them to be done in the same critical section during
  reply decoding is tricky because of the FS.InlineBulkStatus op - which
  has all the statuses in the reply arriving and then all the callbacks,
  so they have to be buffered. It simplifies things a lot to move the
  critical section out of the decode phase and do it after the RPC
  function returns.

  Also new inodes (either newly fetched or newly created) aren't
  properly managed against a callback break happening before we get the
  local inode up and running.

  Fix this by:

   - There's now a combined file status and callback record (struct
     afs_status_cb) to carry both plus some flags.

   - Each operation wrapper function allocates sufficient afs_status_cb
     records for all the vnodes it is interested in and passes them into
     RPC operations to be filled in from the reply.

   - The FileStatus and CallBack record decoders no longer apply the
     new/revised status and callback information to the inode/vnode at
     the point of decoding and instead store the information into the
     record from (2).

   - afs_vnode_commit_status() then revises the file status, detects
     deletion and notes callback information inside of a single critical
     section. It also checks the callback break counters and cancels the
     callback promise if they changed during the operation.

     [*] Note that "callback break counters" are counters of server
     events that cancel one or more callback promises that the client
     thinks it has. The client counts the events and compares the
     counters before and after an operation to see if the callback
     promise it thinks it just got evaporated before it got recorded
     under lock.

   - Volume and server callback break counters are passed into
     afs_iget() allowing callback breaks concurrent with inode set up to
     be detected and the callback promise thence to be cancelled.

   - AFS validation checks are now done under RCU conditions using a
     read lock on cb_lock. This requires vnode->cb_interest to be made
     RCU safe.

   - If the checks in (6) fail, the callback breaker is then called
     under write lock on the cb_lock - but only if the callback break
     counter didn't change from the value read before the checks were
     made.

   - Results from FS.InlineBulkStatus that correspond to inodes we
     currently have in memory are now used to update those inodes'
     status and callback information rather than being discarded. This
     requires those inodes to be looked up before the RPC op is made and
     all their callback break values saved.

  To aid in this, the following changes have also been made:

   - Don't pass the vnode into the reply delivery functions or the
     decoders. The vnode shouldn't be altered anywhere in those paths.
     The only exception, for the moment, is for the call done hook for
     file lock ops that wants access to both the vnode and the call -
     this can be fixed at a later time.

   - Get rid of the call->reply[] void* array and replace it with named
     and typed members. This avoids confusion since different ops were
     mapping different reply[] members to different things.

   - Fix an order-1 kmalloc allocation in afs_do_lookup() and replace it
     with kvcalloc().

   - Always get the reply time. Since callback, lock and fileserver
     record expiry times are calculated for several RPCs, make this
     mandatory.

   - Call afs_pages_written_back() from the operation wrapper rather
     than from the delivery function.

   - Don't store the version and type from a callback promise in a reply
     as the information in them is of very limited use"

* tag 'afs-fixes-b-20190516' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Fix application of the results of a inline bulk status fetch
  afs: Pass pre-fetch server and volume break counts into afs_iget5_set()
  afs: Fix unlink to handle YFS.RemoveFile2 better
  afs: Clear AFS_VNODE_CB_PROMISED if we detect callback expiry
  afs: Make vnode->cb_interest RCU safe
  afs: Split afs_validate() so first part can be used under LOOKUP_RCU
  afs: Don't save callback version and type fields
  afs: Fix application of status and callback to be under same lock
  afs: Always get the reply time
  afs: Fix order-1 allocation in afs_do_lookup()
  afs: Get rid of afs_call::reply[]
  afs: Don't pass the vnode pointer through into the inline bulk status op
2019-05-16 17:18:41 -07:00
Linus Torvalds
227747fb9e AFS fixes
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Merge tag 'afs-fixes-20190516' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull misc AFS fixes from David Howells:
 "This fixes a set of miscellaneous issues in the afs filesystem,
  including:

   - leak of keys on file close.

   - broken error handling in xattr functions.

   - missing locking when updating VL server list.

   - volume location server DNS lookup whereby preloaded cells may not
     ever get a lookup and regular DNS lookups to maintain server lists
     consume power unnecessarily.

   - incorrect error propagation and handling in the fileserver
     iteration code causes operations to sometimes apparently succeed.

   - interruption of server record check/update side op during
     fileserver iteration causes uninterruptible main operations to fail
     unexpectedly.

   - callback promise expiry time miscalculation.

   - over invalidation of the callback promise on directories.

   - double locking on callback break waking up file locking waiters.

   - double increment of the vnode callback break counter.

  Note that it makes some changes outside of the afs code, including:

   - an extra parameter to dns_query() to allow the dns_resolver key
     just accessed to be immediately invalidated. AFS is caching the
     results itself, so the key can be discarded.

   - an interruptible version of wait_var_event().

   - an rxrpc function to allow the maximum lifespan to be set on a
     call.

   - a way for an rxrpc call to be marked as non-interruptible"

* tag 'afs-fixes-20190516' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Fix double inc of vnode->cb_break
  afs: Fix lock-wait/callback-break double locking
  afs: Don't invalidate callback if AFS_VNODE_DIR_VALID not set
  afs: Fix calculation of callback expiry time
  afs: Make dynamic root population wait uninterruptibly for proc_cells_lock
  afs: Make some RPC operations non-interruptible
  rxrpc: Allow the kernel to mark a call as being non-interruptible
  afs: Fix error propagation from server record check/update
  afs: Fix the maximum lifespan of VL and probe calls
  rxrpc: Provide kernel interface to set max lifespan on a call
  afs: Fix "kAFS: AFS vnode with undefined type 0"
  afs: Fix cell DNS lookup
  Add wait_var_event_interruptible()
  dns_resolver: Allow used keys to be invalidated
  afs: Fix afs_cell records to always have a VL server list record
  afs: Fix missing lock when replacing VL server list
  afs: Fix afs_xattr_get_yfs() to not try freeing an error value
  afs: Fix incorrect error handling in afs_xattr_get_acl()
  afs: Fix key leak in afs_release() and afs_evict_inode()
2019-05-16 17:00:13 -07:00
Linus Torvalds
1d9d7cbf28 On the filesystem side we have:
- a fix to enforce quotas set above the mount point (Luis Henriques)
 
 - support for exporting snapshots through NFS (Zheng Yan)
 
 - proper statx implementation (Jeff Layton).  statx flags are mapped
   to MDS caps, with AT_STATX_{DONT,FORCE}_SYNC taken into account.
 
 - some follow-up dentry name handling fixes, in particular elimination
   of our hand-rolled helper and the switch to __getname() as suggested
   by Al (Jeff Layton)
 
 - a set of MDS client cleanups in preparation for async MDS requests
   in the future (Jeff Layton)
 
 - a fix to sync the filesystem before remounting (Jeff Layton)
 
 On the rbd side, work is on-going on object-map and fast-diff image
 features.
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Merge tag 'ceph-for-5.2-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "On the filesystem side we have:

   - a fix to enforce quotas set above the mount point (Luis Henriques)

   - support for exporting snapshots through NFS (Zheng Yan)

   - proper statx implementation (Jeff Layton). statx flags are mapped
     to MDS caps, with AT_STATX_{DONT,FORCE}_SYNC taken into account.

   - some follow-up dentry name handling fixes, in particular
     elimination of our hand-rolled helper and the switch to __getname()
     as suggested by Al (Jeff Layton)

   - a set of MDS client cleanups in preparation for async MDS requests
     in the future (Jeff Layton)

   - a fix to sync the filesystem before remounting (Jeff Layton)

  On the rbd side, work is on-going on object-map and fast-diff image
  features"

* tag 'ceph-for-5.2-rc1' of git://github.com/ceph/ceph-client: (29 commits)
  ceph: flush dirty inodes before proceeding with remount
  ceph: fix unaligned access in ceph_send_cap_releases
  libceph: make ceph_pr_addr take an struct ceph_entity_addr pointer
  libceph: fix unaligned accesses in ceph_entity_addr handling
  rbd: don't assert on writes to snapshots
  rbd: client_mutex is never nested
  ceph: print inode number in __caps_issued_mask debugging messages
  ceph: just call get_session in __ceph_lookup_mds_session
  ceph: simplify arguments and return semantics of try_get_cap_refs
  ceph: fix comment over ceph_drop_caps_for_unlink
  ceph: move wait for mds request into helper function
  ceph: have ceph_mdsc_do_request call ceph_mdsc_submit_request
  ceph: after an MDS request, do callback and completions
  ceph: use pathlen values returned by set_request_path_attr
  ceph: use __getname/__putname in ceph_mdsc_build_path
  ceph: use ceph_mdsc_build_path instead of clone_dentry_name
  ceph: fix potential use-after-free in ceph_mdsc_build_path
  ceph: dump granular cap info in "caps" debugfs file
  ceph: make iterate_session_caps a public symbol
  ceph: fix NULL pointer deref when debugging is enabled
  ...
2019-05-16 16:24:01 -07:00
Linus Torvalds
2c45e7fbc9 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management updates from Zhang Rui:

 - Remove the 'module' Kconfig option for thermal subsystem framework
   because the thermal framework are required to be ready as early as
   possible to avoid overheat at boot time (Daniel Lezcano)

 - Fix a bug that thermal framework pokes disabled thermal zones upon
   resume (Wei Wang)

  - A couple of cleanups and trivial fixes on int340x thermal drivers
    (Srinivas Pandruvada, Zhang Rui, Sumeet Pawnikar)

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  drivers: thermal: processor_thermal: Downgrade error message
  mlxsw: Remove obsolete dependency on THERMAL=m
  hwmon/drivers/core: Simplify complex dependency
  thermal/drivers/core: Fix typo in the option name
  thermal/drivers/core: Remove depends on THERMAL in Kconfig
  thermal/drivers/core: Remove module unload code
  thermal/drivers/core: Remove the module Kconfig's option
  thermal: core: skip update disabled thermal zones after suspend
  thermal: make device_register's type argument const
  thermal: intel: int340x: processor_thermal_device: simplify to get driver data
  thermal/int3403_thermal: favor _TMP instead of PTYP
2019-05-16 16:16:18 -07:00
Linus Torvalds
311f71281f - Improve DM snapshot target's scalability by using finer grained
locking.  Requires some list_bl interface improvements.
 
 - Add ability for DM integrity to use a bitmap mode, that tracks regions
   where data and metadata are out of sync, instead of using a journal.
 
 - Improve DM thin provisioning target to not write metadata changes to
   disk if the thin-pool and associated thin devices are merely
   activated but not used.  This avoids metadata corruption due to
   concurrent activation of thin devices across different OS instances
   (e.g. split brain scenarios, which ultimately would be avoided if
   proper device filters were used -- but not having proper filtering has
   proven a very common configuration mistake)
 
 - Fix missing call to path selector type->end_io in DM multipath.  This
   fixes reported performance problems due to inaccurate path selector IO
   accounting causing an imbalance of IO (e.g. avoiding issuing IO to
   particular path due to it seemingly being heavily used).
 
 - Fix bug in DM cache metadata's loading of its discard bitset that
   could lead to all cache blocks being discarded if the very first cache
   block was discarded (thankfully in practice the first cache block is
   generally in use; be it FS superblock, partition table, disk label,
   etc).
 
 - Add testing-only DM dust target which simulates a device that has
   failing sectors and/or read failures.
 
 - Fix a DM init error path reference count hang that caused boot hangs
   if user supplied malformed input on kernel commandline.
 
 - Fix a couple issues with DM crypt target's logging being overly
   verbose or lacking context.
 
 - Various other small fixes to DM init, DM multipath, DM zoned, and DM
   crypt.
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Merge tag 'for-5.2/dm-changes-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper updates from Mike Snitzer:

 - Improve DM snapshot target's scalability by using finer grained
   locking. Requires some list_bl interface improvements.

 - Add ability for DM integrity to use a bitmap mode, that tracks
   regions where data and metadata are out of sync, instead of using a
   journal.

 - Improve DM thin provisioning target to not write metadata changes to
   disk if the thin-pool and associated thin devices are merely
   activated but not used. This avoids metadata corruption due to
   concurrent activation of thin devices across different OS instances
   (e.g. split brain scenarios, which ultimately would be avoided if
   proper device filters were used -- but not having proper filtering
   has proven a very common configuration mistake)

 - Fix missing call to path selector type->end_io in DM multipath. This
   fixes reported performance problems due to inaccurate path selector
   IO accounting causing an imbalance of IO (e.g. avoiding issuing IO to
   particular path due to it seemingly being heavily used).

 - Fix bug in DM cache metadata's loading of its discard bitset that
   could lead to all cache blocks being discarded if the very first
   cache block was discarded (thankfully in practice the first cache
   block is generally in use; be it FS superblock, partition table, disk
   label, etc).

 - Add testing-only DM dust target which simulates a device that has
   failing sectors and/or read failures.

 - Fix a DM init error path reference count hang that caused boot hangs
   if user supplied malformed input on kernel commandline.

 - Fix a couple issues with DM crypt target's logging being overly
   verbose or lacking context.

 - Various other small fixes to DM init, DM multipath, DM zoned, and DM
   crypt.

* tag 'for-5.2/dm-changes-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (42 commits)
  dm: fix a couple brace coding style issues
  dm crypt: print device name in integrity error message
  dm crypt: move detailed message into debug level
  dm ioctl: fix hang in early create error condition
  dm integrity: whitespace, coding style and dead code cleanup
  dm integrity: implement synchronous mode for reboot handling
  dm integrity: handle machine reboot in bitmap mode
  dm integrity: add a bitmap mode
  dm integrity: introduce a function add_new_range_and_wait()
  dm integrity: allow large ranges to be described
  dm ingerity: pass size to dm_integrity_alloc_page_list()
  dm integrity: introduce rw_journal_sectors()
  dm integrity: update documentation
  dm integrity: don't report unused options
  dm integrity: don't check null pointer before kvfree and vfree
  dm integrity: correctly calculate the size of metadata area
  dm dust: Make dm_dust_init and dm_dust_exit static
  dm dust: remove redundant unsigned comparison to less than zero
  dm mpath: always free attached_handler_name in parse_path()
  dm init: fix max devices/targets checks
  ...
2019-05-16 15:55:48 -07:00
Qian Cai
7878c231da slab: remove /proc/slab_allocators
It turned out that DEBUG_SLAB_LEAK is still broken even after recent
recue efforts that when there is a large number of objects like
kmemleak_object which is normal on a debug kernel,

  # grep kmemleak /proc/slabinfo
  kmemleak_object   2243606 3436210 ...

reading /proc/slab_allocators could easily loop forever while processing
the kmemleak_object cache and any additional freeing or allocating
objects will trigger a reprocessing. To make a situation worse,
soft-lockups could easily happen in this sitatuion which will call
printk() to allocate more kmemleak objects to guarantee an infinite
loop.

Also, since it seems no one had noticed when it was totally broken
more than 2-year ago - see the commit fcf88917dd ("slab: fix a crash
by reading /proc/slab_allocators"), probably nobody cares about it
anymore due to the decline of the SLAB. Just remove it entirely.

Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-16 15:51:55 -07:00
David Howells
39db9815da afs: Fix application of the results of a inline bulk status fetch
Fix afs_do_lookup() such that when it does an inline bulk status fetch op,
it will update inodes that are already extant (something that afs_iget()
doesn't do) and to cache permits for each inode created (thereby avoiding a
follow up FS.FetchStatus call to determine this).

Extant inodes need looking up in advance so that their cb_break counters
before and after the operation can be compared.  To this end, the inode
pointers are cached so that they don't need looking up again after the op.

Fixes: 5cf9dd55a0 ("afs: Prospectively look up extra files when doing a single lookup")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 22:23:21 +01:00
David Howells
b835915325 afs: Pass pre-fetch server and volume break counts into afs_iget5_set()
Pass the server and volume break counts from before the status fetch
operation that queried the attributes of a file into afs_iget5_set() so
that the new vnode's break counters can be initialised appropriately.

This allows detection of a volume or server break that happened whilst we
were fetching the status or setting up the vnode.

Fixes: c435ee3455 ("afs: Overhaul the callback handling")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 22:23:21 +01:00
David Howells
a38a75581e afs: Fix unlink to handle YFS.RemoveFile2 better
Make use of the status update for the target file that the YFS.RemoveFile2
RPC op returns to correctly update the vnode as to whether the file was
actually deleted or just had nlink reduced.

Fixes: 30062bd13e ("afs: Implement YFS support in the fs client")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 22:23:21 +01:00
David Howells
61c347ba55 afs: Clear AFS_VNODE_CB_PROMISED if we detect callback expiry
Fix afs_validate() to clear AFS_VNODE_CB_PROMISED on a vnode if we detect
any condition that causes the callback promise to be broken implicitly,
including server break (cb_s_break), volume break (cb_v_break) or callback
expiry.

Fixes: ae3b7361dc ("afs: Fix validation/callback interaction")
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 22:23:21 +01:00
David Howells
f642404a04 afs: Make vnode->cb_interest RCU safe
Use RCU-based freeing for afs_cb_interest struct objects and use RCU on
vnode->cb_interest.  Use that change to allow afs_check_validity() to use
read_seqbegin_or_lock() instead of read_seqlock_excl().

This also requires the caller of afs_check_validity() to hold the RCU read
lock across the call.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 22:23:21 +01:00
David Howells
c925bd0ac4 afs: Split afs_validate() so first part can be used under LOOKUP_RCU
Split afs_validate() so that the part that decides if the vnode is still
valid can be used under LOOKUP_RCU conditions from afs_d_revalidate().

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 22:23:21 +01:00
David Howells
7c71245866 afs: Don't save callback version and type fields
Don't save callback version and type fields as the version is about the
format of the callback information and the type is relative to the
particular RPC call.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 22:23:21 +01:00
Rob Herring
8122de5460 dt-bindings: Convert vendor prefixes to json-schema
Convert the vendor prefix registry to a schema. This will enable checking
that new vendor prefixes are added (in addition to the less than perfect
checkpatch.pl check) and will also check against adding other prefixes
which are not vendors.

Converted vendor-prefixes.txt using the following sed script:

sed -e 's/\([a-zA-Z0-9\-]*\)[[:space:]]*\([a-zA-Z0-9].*\)/  "^\1,\.\*\":\n    description: \2/'

Signed-off-by: Rob Herring <robh@kernel.org>
2019-05-16 15:27:21 -05:00
Linus Torvalds
01be377c62 media updates for v5.2-rc1
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Merge tag 'media/v5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:
 "Some fixes for some platform drivers (rockchip, atmel, omap, daVinci,
  tegra-cec, coda and rcar).

  Also includes a fix on one of the V4L2 uAPI doc, explaining a border
  case"

* tag 'media/v5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: rockchip/vpu: Fix/re-order probe-error/remove path
  media: rockchip/vpu: Initialize mdev->bus_info
  media: rockchip/vpu: Get vdev from the file arg in vidioc_querycap()
  media: rockchip/vpu: Add missing dont_use_autosuspend() calls
  media: rockchip/vpu: Do not request id 0 for our video device
  media: tegra-cec: fix cec_notifier_parse_hdmi_phandle return check
  media: davinci/vpbe: array underflow in vpbe_enum_outputs()
  media: field-order.rst: clarify FIELD_ANY and FIELD_NONE
  media: staging/imx: add media device to capture register
  media: rcar-csi2: Propagate the FLD signal for NTSC and PAL
  media: rcar-csi2: restart CSI-2 link if error is detected
  media: omap_vout: potential buffer overflow in vidioc_dqbuf()
  media: coda: fix unset field and fail on invalid field in buf_prepare
  media: atmel: atmel-isc: fix asd memory allocation
  media: atmel: atmel-isc: fix INIT_WORK misplacement
  media: atmel: atmel-isc: limit incoming pixels per frame
2019-05-16 11:57:16 -07:00
Linus Torvalds
11b1177399 * Do not build mpc85_edac as a module (Michael Ellerman)
* Correct edac_mc_find()'s return value on error	(Robert Richter)
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Merge tag 'edac_fixes_for_5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

Pull EDAC fixes from Borislav Petkov:

 - Do not build mpc85_edac as a module (Michael Ellerman)

 - Correct edac_mc_find()'s return value on error (Robert Richter)

* tag 'edac_fixes_for_5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  EDAC/mc: Fix edac_mc_find() in case no device is found
  EDAC/mpc85xx: Prevent building as a module
2019-05-16 11:55:35 -07:00
Linus Torvalds
4e785e8d99 configs updates for Linux 5.2:
- a fix for an error path use after free (YueHaibing)
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Merge tag 'configfs-for-5.2' of git://git.infradead.org/users/hch/configfs

Pull configfs update from Christoph Hellwig:

 - a fix for an error path use after free (YueHaibing)

* tag 'configfs-for-5.2' of git://git.infradead.org/users/hch/configfs:
  configfs: fix possible use-after-free in configfs_register_group
2019-05-16 11:46:58 -07:00
Linus Torvalds
27ebbf9d5b asm-generic: kill <asm/segment.h> and improve nommu generic uaccess helpers
Christoph Hellwig writes:
 
   This is a series doing two somewhat interwinded things.  It improves
   the asm-generic nommu uaccess helper to optionally be entirely generic
   and not require any arch helpers for the actual uaccess.  For the
   generic uaccess.h to actually be generically useful I also had to kill
   off the mess we made of <asm/segment.h>, which really shouldn't exist
   on most architectures.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'asm-generic-nommu' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull nommu generic uaccess updates from Arnd Bergmann:
 "asm-generic: kill <asm/segment.h> and improve nommu generic uaccess helpers

  Christoph Hellwig writes:

     This is a series doing two somewhat interwinded things. It improves
     the asm-generic nommu uaccess helper to optionally be entirely
     generic and not require any arch helpers for the actual uaccess.
     For the generic uaccess.h to actually be generically useful I also
     had to kill off the mess we made of <asm/segment.h>, which really
     shouldn't exist on most architectures"

* tag 'asm-generic-nommu' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: optimize generic uaccess for 8-byte loads and stores
  asm-generic: provide entirely generic nommu uaccess
  arch: mostly remove <asm/segment.h>
  asm-generic: don't include <asm/segment.h> from <asm/uaccess.h>
2019-05-16 11:26:37 -07:00
Linus Torvalds
d396360acd Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Misc fixes and updates:

   - a handful of MDS documentation/comment updates

   - a cleanup related to hweight interfaces

   - a SEV guest fix for large pages

   - a kprobes LTO fix

   - and a final cleanup commit for vDSO HPET support removal"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/speculation/mds: Improve CPU buffer clear documentation
  x86/speculation/mds: Revert CPU buffer clear on double fault exit
  x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT
  x86/mm: Do not use set_{pud, pmd}_safe() when splitting a large page
  x86/kprobes: Make trampoline_handler() global and visible
  x86/vdso: Remove hpet_page from vDSO
2019-05-16 11:02:27 -07:00
Linus Torvalds
b2c3dda6f8 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull time fixes from Ingo Molnar:
 "A TIA adjtimex interface extension, and a POSIX compliance ABI fix for
  timespec64 users"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  ntp: Allow TAI-UTC offset to be set to zero
  y2038: Make CONFIG_64BIT_TIME unconditional
2019-05-16 11:00:20 -07:00
Linus Torvalds
c77ee64f8a Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "An x86 PMU constraint fix, an interface fix, and a Sparse fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Allow PEBS multi-entry in watermark mode
  perf/x86/intel: Fix INTEL_FLAGS_EVENT_CONSTRAINT* masking
  perf/x86/amd/iommu: Make the 'amd_iommu_attr_groups' symbol static
2019-05-16 10:58:54 -07:00
Linus Torvalds
f57d7715d7 Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fix from Ingo Molnar:
 "A single rwsem fix"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rwsem: Prevent decrement of reader count before increment
2019-05-16 10:54:19 -07:00
Roman Gushchin
05b2892637 signal: unconditionally leave the frozen state in ptrace_stop()
Alex Xu reported a regression in strace, caused by the introduction of
the cgroup v2 freezer. The regression can be reproduced by stracing
the following simple program:

  #include <unistd.h>

  int main() {
      write(1, "a", 1);
      return 0;
  }

An attempt to run strace ./a.out leads to the infinite loop:
  [ pre-main omitted ]
  write(1, "a", 1)                        = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
  write(1, "a", 1)                        = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
  write(1, "a", 1)                        = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
  write(1, "a", 1)                        = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
  write(1, "a", 1)                        = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
  write(1, "a", 1)                        = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
  [ repeats forever ]

The problem occurs because the traced task leaves ptrace_stop()
(and the signal handling loop) with the frozen bit set. So let's
call cgroup_leave_frozen(true) unconditionally after sleeping
in ptrace_stop().

With this patch applied, strace works as expected:
  [ pre-main omitted ]
  write(1, "a", 1)                        = 1
  exit_group(0)                           = ?
  +++ exited with 0 +++

Reported-by: Alex Xu <alex_y_xu@yahoo.ca>
Fixes: 76f969e894 ("cgroup: cgroup v2 freezer")
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
2019-05-16 10:43:58 -07:00
Linus Torvalds
b2ca74d32b Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core fixes from Ingo Molnar:
 "A handful of objtool updates, plus a documentation addition for
  __ab_c_size()"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Fix whitelist documentation typo
  objtool: Fix function fallthrough detection
  objtool: Don't use ignore flag for fake jumps
  overflow.h: Add comment documenting __ab_c_size()
2019-05-16 10:29:00 -07:00
Linus Torvalds
8c05f3b965 ARM development updates:
- more unified assembly conversions for clang
 - drop obsolete -mauto-it assembler option
 - remove arm_memory_present in preference to the generic version
 - remove unused asm/limits.h header
 - vdso linker update
 
 We tried to make the assembler warn if unified syntax was not used,
 but unfortunately older versions of GCC warn, so the commit had to
 be reverted.
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:
 "ARM development updates:

   - more unified assembly conversions for clang

   - drop obsolete -mauto-it assembler option

   - remove arm_memory_present in preference to the generic version

   - remove unused asm/limits.h header

   - vdso linker update

  We tried to make the assembler warn if unified syntax was not used,
  but unfortunately older versions of GCC warn, so the commit had to be
  reverted"

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  Revert "ARM: 8846/1: warn if divided syntax assembler is used"
  ARM: 8858/1: vdso: use $(LD) instead of $(CC) to link VDSO
  ARM: 8855/1: remove unused <asm/limits.h>
  ARM: 8850/1: use memblocks_present
  ARM: 8854/1: drop -mauto-it
  ARM: 8846/1: warn if divided syntax assembler is used
  ARM: 8853/1: drop WASM to work around LLVM issue
  ARM: 8852/1: uaccess: use unified assembler language syntax
  ARM: 8851/1: add TUSERCOND() macro for conditional postfix
2019-05-16 09:41:54 -07:00
Linus Torvalds
ab02888e39 ARM: SoC defconfig updates
- Mostly the usual churn due to options being reordered or not added
    in the right locations.
  - Some various enabling of new drivers, etc.
 
 ... i.e. the usual updates, nothing particularly sticks out.
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Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC defconfig updates from Olof Johansson:
 "Mostly the usual churn due to options being reordered or not added in
  the right locations.

  Some various enabling of new drivers, etc.

  ... i.e. the usual updates, nothing particularly sticks out"

* tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (23 commits)
  arm64: defconfig: Update UFSHCD for Hi3660 soc
  ARM: multi_v7_defconfig: Enable support for STPMIC1
  ARM: multi_v7_defconfig: Enable missing drivers for supported Chromebooks
  arm64: defconfig: enable mv-xor driver
  ARM: Enable Trusted Foundations for multiplatform ARM v7
  ARM: tegra: Enable Trusted Foundations by default
  ARM: tegra: Update default configuration for v5.1-rc1
  ARM: multi_v7_defconfig: Update for moved options
  ARM: multi_v7_defconfig: Update for dropped options
  ARM: shmobile: Enable USB [EO]HCI HCD PLATFORM support in shmobile_defconfig
  ARM: shmobile: Enable PHY_RCAR_GEN3_USB2 in shmobile_defconfig
  ARM: qcom_defconfig: add options for LG Nexus 5 phone
  arm64: defconfig: include the Agilex platform to the arm64 defconfig
  arm64: defconfig: Add PWM Fan support
  arm64: defconfig: Enable Tegra HDA support
  ARM: multi_v7_defconfig: Enable support for CFI NOR FLASH
  ARM: shmobile: defconfig: Enable support for CFI NOR FLASH
  ARM: shmobile: defconfig: Refresh for v5.1-rc1
  ARM: multi_v7_defconfig: enable the Amlogic Meson ADC and eFuse drivers
  arm64: defconfig: enable fpga and service layer
  ...
2019-05-16 09:35:26 -07:00
David Howells
d8076bdb56 uapi: Wire up the mount API syscalls on non-x86 arches [ver #2]
Wire up the mount API syscalls on non-x86 arches.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-16 12:23:45 -04:00
David Howells
9c8ad7a2ff uapi, x86: Fix the syscall numbering of the mount API syscalls [ver #2]
Fix the syscall numbering of the mount API syscalls so that the numbers
match between i386 and x86_64 and that they're in the common numbering
scheme space.

Fixes: a07b200047 ("vfs: syscall: Add open_tree(2) to reference or clone a mount")
Fixes: 2db154b3ea ("vfs: syscall: Add move_mount(2) to move mounts around")
Fixes: 24dcb3d90a ("vfs: syscall: Add fsopen() to prepare for superblock creation")
Fixes: ecdab150fd ("vfs: syscall: Add fsconfig() for configuring and managing a context")
Fixes: 93766fbd26 ("vfs: syscall: Add fsmount() to create a mount for a superblock")
Fixes: cf3cba4a42 ("vfs: syscall: Add fspick() to select a superblock for reconfiguration")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-16 12:23:45 -04:00
Christian Brauner
1cdc415f10 uapi, fsopen: use square brackets around "fscontext" [ver #2]
Make the name of the anon inode fd "[fscontext]" instead of "fscontext".
This is minor but most core-kernel anon inode fds already carry square
brackets around their name:

[eventfd]
[eventpoll]
[fanotify]
[io_uring]
[pidfd]
[signalfd]
[timerfd]
[userfaultfd]

For the sake of consistency lets do the same for the fscontext anon inode
fd that comes with the new mount api.

Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-16 12:23:45 -04:00