Commit Graph

727803 Commits

Author SHA1 Message Date
Jeff Layton
f0e2828062 xfs: convert to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Dave Chinner <dchinner@redhat.com>
2018-01-29 06:42:21 -05:00
Jeff Layton
bb8c2d66bc ufs: use new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2018-01-29 06:42:21 -05:00
Jeff Layton
cc56c33e78 ocfs2: convert to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
2018-01-29 06:42:21 -05:00
Jeff Layton
1f15a550f5 nfsd: convert to new i_version API
Mostly just making sure we use the "get" wrappers so we know when
it is being fetched for later use.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2018-01-29 06:42:21 -05:00
Jeff Layton
1eb5d98f16 nfs: convert to new i_version API
For NFS, we just use the "raw" API since the i_version is mostly
managed by the server. The exception there is when the client
holds a write delegation, but we only need to bump it once
there anyway to handle CB_GETATTR.

Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2018-01-29 06:42:21 -05:00
Jeff Layton
ee73f9a52a ext4: convert to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Theodore Ts'o <tytso@mit.edu>
2018-01-29 06:42:21 -05:00
Jeff Layton
e1d747d9b6 ext2: convert to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
2018-01-29 06:42:20 -05:00
Jeff Layton
317bc94780 exofs: switch to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2018-01-29 06:42:20 -05:00
Jeff Layton
c7f88c4e78 btrfs: convert to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: David Sterba <dsterba@suse.com>
2018-01-29 06:42:20 -05:00
Jeff Layton
a01179e6eb afs: convert to new i_version API
For AFS, it's generally treated as an opaque value, so we use the
*_raw variants of the API here.

Note that AFS has quite a different definition for this counter. AFS
only increments it on changes to the data to the data in regular files
and contents of the directories. Inode metadata changes do not result
in a version increment.

We'll need to reconcile that somehow if we ever want to present this to
userspace via statx.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2018-01-29 06:42:20 -05:00
Jeff Layton
9dffe569d9 affs: convert to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2018-01-29 06:42:20 -05:00
Jeff Layton
2489dbabea fat: convert to new i_version API
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2018-01-29 06:42:20 -05:00
Jeff Layton
7594c46116 fs: don't take the i_lock in inode_inc_iversion
The rationale for taking the i_lock when incrementing this value is
lost in antiquity. The readers of the field don't take it (at least
not universally), so my assumption is that it was only done here to
serialize incrementors.

If that is indeed the case, then we can drop the i_lock from this
codepath and treat it as a atomic64_t for the purposes of
incrementing it. This allows us to use inode_inc_iversion without
any danger of lock inversion.

Note that the read side is not fetched atomically with this change.
The assumption here is that that is not a critical issue since the
i_version is not fully synchronized with anything else anyway.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
2018-01-29 06:42:20 -05:00
Jeff Layton
ae5e165d85 fs: new API for handling inode->i_version
Add a documentation blob that explains what the i_version field is, how
it is expected to work, and how it is currently implemented by various
filesystems.

We already have inode_inc_iversion. Add several other functions for
manipulating and accessing the i_version counter. For now, the
implementation is trivial and basically works the way that all of the
open-coded i_version accesses work today.

Future patches will convert existing users of i_version to use the new
API, and then convert the backend implementation to do things more
efficiently.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
2018-01-29 06:41:30 -05:00
Boris Brezillon
571cb17b23 Core changes:
* Fix NAND_CMD_NONE handling in nand_command[_lp]() hooks
 * Introduce the ->exec_op() infrastructure
 * Rework NAND buffers handling
 * Fix ECC requirements for K9F4G08U0D
 * Fix nand_do_read_oob() to return the number of bitflips
 * Mark K9F1G08U0E as not supporting subpage writes
 
 Driver changes:
 * MTK: Rework the driver to support new IP versions
 * OMAP OneNAND: Full rework to use new APIs (libgpio, dmaengine) and fix
   DT support
 * Marvell: Add a new driver to replace the pxa3xx one
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Merge tag 'nand/for-4.16' of git://git.infradead.org/linux-mtd into mtd/next

Pull NAND changes from Boris Brezillon:

"
  Core changes:
  * Fix NAND_CMD_NONE handling in nand_command[_lp]() hooks
  * Introduce the ->exec_op() infrastructure
  * Rework NAND buffers handling
  * Fix ECC requirements for K9F4G08U0D
  * Fix nand_do_read_oob() to return the number of bitflips
  * Mark K9F1G08U0E as not supporting subpage writes

  Driver changes:
  * MTK: Rework the driver to support new IP versions
  * OMAP OneNAND: Full rework to use new APIs (libgpio, dmaengine) and fix
    DT support
  * Marvell: Add a new driver to replace the pxa3xx one
"
2018-01-29 09:58:36 +01:00
Boris Brezillon
c8f22b02a8 This pull-request contains the following notable changes:
Core changes:
 * Add support to new ISSI and Cypress/Spansion memory parts.
 * Fix support of Micron memories by checking error bits in the FSR.
 * Fix update of block-protection bits by reading back the SR.
 * Restore the internal state of the SPI flash memory when removing the
   device.
 
 Driver changes:
 * Maintenance for Freescale, Intel and Metiatek drivers.
 * Add support of the direct access mode for the Cadence QSPI controller.
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Merge tag 'spi-nor/for-4.16' of git://git.infradead.org/linux-mtd into mtd/next

Pull spi-nor changes from Cyrille Pitchen:

"
  This pull-request contains the following notable changes:

  Core changes:
  * Add support to new ISSI and Cypress/Spansion memory parts.
  * Fix support of Micron memories by checking error bits in the FSR.
  * Fix update of block-protection bits by reading back the SR.
  * Restore the internal state of the SPI flash memory when removing the
    device.

  Driver changes:
  * Maintenance for Freescale, Intel and Metiatek drivers.
  * Add support of the direct access mode for the Cadence QSPI controller.
"
2018-01-29 09:55:14 +01:00
Trond Myklebust
e231c6879c NFS: Fix a race between mmap() and O_DIRECT
When locking the file in order to do O_DIRECT on it, we must unmap
any mmapped ranges on the pagecache so that we can flush out the
dirty data.

Fixes: a5864c999d ("NFS: Do not serialise O_DIRECT reads and writes")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.8+
2018-01-28 22:00:15 -05:00
Linus Torvalds
d8a5b80568 Linux 4.15 2018-01-28 13:20:33 -08:00
Corentin Labbe
3356c8c0b8 IB/qib: remove qib_keys.c
qib_keys.c was left uncompilable in commit 7c2e11fe2d ("IB/qib: Remove qp and mr functionality from qib")
Since nothing need it, remove it from tree.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Corentin Labbe
57ac30c0ef IB/mthca: remove mthca_user.h
mthca_user.h is unused since commit 486f60954c ("IB/mthca: Move user vendor structures")
Remove it from tree.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Leon Romanovsky
925f7ea7a6 RDMA/cm: Fix access to uninitialized variable
The ndev will be initialized and held only for successful
ib_get_cached_gid(), otherwise it is garbage stack memory.
Calling dev_put() in failure path is wrong.

Fixes: 16c72e4028 ("IB/cm: Refactor to avoid setting path record software only fields")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Parav Pandit
3cd96fddcc RDMA/cma: Use existing netif_is_bond_master function
When checking whatever the current netdev is the bond master interface,
use kernel API netif_is_bond_master() instead of hardcoding the check.
No functionality is changed.

Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Parav Pandit
708ea056b3 IB/core: Avoid SGID attributes query while converting GID from OPA to IB
SGID attributes are not used during OPA to IB GID conversion.
Therefore don't query it.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Leon Romanovsky
b081808a66 RDMA/mlx5: Avoid memory leak in case of XRCD dealloc failure
Failure in XRCD FW deallocation command leaves memory leaked and
returns error to the user which he can't do anything about it.

This patch changes behavior to always free memory and always return
success to the user.

Fixes: e126ba97db ("mlx5: Add driver for Mellanox Connect-IB adapters")
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Jack Morgenstein
f23a5350e4 IB/umad: Fix use of unprotected device pointer
The ib_write_umad() is protected by taking the umad file mutex.
However, it accesses file->port->ib_dev -- which is protected only by the
port's mutex (field file_mutex).

The ib_umad_remove_one() calls ib_umad_kill_port() which sets
port->ib_dev to NULL under the port mutex (NOT the file mutex).
It then sets the mad agent to "dead" under the umad file mutex.

This is a race condition -- because there is a window where
port->ib_dev is NULL, while the agent is not "dead".

As a result, we saw stack traces like:

[16490.678059] BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0
[16490.678246] IP: ib_umad_write+0x29c/0xa3a [ib_umad]
[16490.678333] PGD 0 P4D 0
[16490.678404] Oops: 0000 [#1] SMP PTI
[16490.678466] Modules linked in: rdma_ucm(OE) ib_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_uverbs(OE) ib_umad(OE) mlx4_en(OE) ptp pps_core mlx4_ib(OE-) ib_core(OE) mlx4_core(OE) mlx_compat
(OE) memtrack(OE) devlink mst_pciconf(OE) mst_pci(OE) netconsole nfsv3 nfs_acl nfs lockd grace fscache cfg80211 rfkill esp6_offload esp6 esp4_offload esp4 sunrpc kvm_intel kvm ppdev parport_pc irqbypass
parport joydev i2c_piix4 virtio_balloon cirrus drm_kms_helper ttm drm e1000 serio_raw virtio_pci virtio_ring virtio ata_generic pata_acpi qemu_fw_cfg [last unloaded: mlxfw]
[16490.679202] CPU: 4 PID: 3115 Comm: sminfo Tainted: G           OE   4.14.13-300.fc27.x86_64 #1
[16490.679339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu2 04/01/2014
[16490.679477] task: ffff9cf753890000 task.stack: ffffaf70c26b0000
[16490.679571] RIP: 0010:ib_umad_write+0x29c/0xa3a [ib_umad]
[16490.679664] RSP: 0018:ffffaf70c26b3d90 EFLAGS: 00010202
[16490.679747] RAX: 0000000000000010 RBX: ffff9cf75610fd80 RCX: 0000000000000000
[16490.679856] RDX: 0000000000000001 RSI: 00007ffdf2bfd714 RDI: ffff9cf6bb2a9c00

In the above trace, ib_umad_write is trying to dereference the NULL
file->port->ib_dev pointer.

Fix this by using the agent's device pointer (the device field
in struct ib_mad_agent) -- which IS protected by the umad file mutex.

Cc: <stable@vger.kernel.org> # v4.11
Fixes: 44c58487d5 ("IB/core: Define 'ib' and 'roce' rdma_ah_attr types")
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Markus Elfring
4cb24c550f IB/iser: Combine substrings for three messages
The script "checkpatch.pl" pointed information out like the following.

WARNING: quoted string split across lines

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Markus Elfring
d769e6be24 IB/iser: Delete an unnecessary variable initialisation in iser_send_data_out()
The variable "tx_desc" will be set to an appropriate pointer a bit later.
Thus omit the explicit initialisation at the beginning.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Markus Elfring
cac5141199 IB/iser: Delete an error message for a failed memory allocation in iser_send_data_out()
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-28 14:07:16 -07:00
Ingo Molnar
e4c1091cb4 perf/core improvements and fixes:
- Introduce a errno code to string facility to allow tools such as
   'perf trace' to support multi-arch perf.data decoding/beautifying,
   uses errno header files copied from the kernel, this allows
   removing the need for audit-libs in arches generating its syscall
   tables from the kernel sources, so far x86 and s/390 (Hendrik Brueckner)
 
 - Intel-PT/BTS sample synthesizing fixes (Adrian Hunter)
 
 - Intel vendor event JSON updates for the Broadwell, BroadwellDE,
   BroadwellX, Goldmont, Haswell, HaswellX, IvyBridge, IvyBridge, IvyTown,
   IvyTown, Silvermont, Skylake and SkylakeX architectures. (Andi Kleen)
 
 - Use ui__error() to have --field error handling messages not to
   disappear due to TUI exit cleanup (Arnaldo Carvalho de Melo)
 
 - Don't warn about unavailability of builtin clang in 'perf trace', just
   continue fallbacking to using the external toolchain (Arnaldo Carvalho de Melo)
 
 - Move conditional O_CLOEXEC define to util.h to keep the build
   working on older distros where that is not available now that
   this define will be used in more source files (Arnaldo Carvalho de Melo)
 
 - Using O_CLOEXEC in do_open() to avoid having too many open files when
   using 'perf script' from the 'perf report' TUI scripts browser (Wang YanQing)
 
 - Add 'perf trace --print-sample' to help in debugging the printing
   of timestamp calculations, for instance (Arnaldo Carvalho de Melo)
 
 - Do not print from time delta for interrupted syscall lines in 'perf
   trace' (those ending with '...') just print the total syscall duration
   at raw_syscalls:sys_exit time (Arnaldo Carvalho de Melo)
 
 - Beautify FUTEX_BITSET_MATCH_ANY in the futex syscall in 'perf trace'
   (Arnaldo Carvalho de Melo)
 
 - Display EXTRA features for 'make VF=1' build (Jiri Olsa)
 
 - Add support for CoreSight trace decoding by making the perf tools
   use the external openCSD (Mathieu Poirier, Tor Jeremiassen)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-4.16-20180125' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

- Introduce a errno code to string facility to allow tools such as
  'perf trace' to support multi-arch perf.data decoding/beautifying,
  uses errno header files copied from the kernel, this allows
  removing the need for audit-libs in arches generating its syscall
  tables from the kernel sources, so far x86 and s/390 (Hendrik Brueckner)

- Intel-PT/BTS sample synthesizing fixes (Adrian Hunter)

- Intel vendor event JSON updates for the Broadwell, BroadwellDE,
  BroadwellX, Goldmont, Haswell, HaswellX, IvyBridge, IvyBridge, IvyTown,
  IvyTown, Silvermont, Skylake and SkylakeX architectures. (Andi Kleen)

- Use ui__error() to have --field error handling messages not to
  disappear due to TUI exit cleanup (Arnaldo Carvalho de Melo)

- Don't warn about unavailability of builtin clang in 'perf trace', just
  continue fallbacking to using the external toolchain (Arnaldo Carvalho de Melo)

- Move conditional O_CLOEXEC define to util.h to keep the build
  working on older distros where that is not available now that
  this define will be used in more source files (Arnaldo Carvalho de Melo)

- Using O_CLOEXEC in do_open() to avoid having too many open files when
  using 'perf script' from the 'perf report' TUI scripts browser (Wang YanQing)

- Add 'perf trace --print-sample' to help in debugging the printing
  of timestamp calculations, for instance (Arnaldo Carvalho de Melo)

- Do not print from time delta for interrupted syscall lines in 'perf
  trace' (those ending with '...') just print the total syscall duration
  at raw_syscalls:sys_exit time (Arnaldo Carvalho de Melo)

- Beautify FUTEX_BITSET_MATCH_ANY in the futex syscall in 'perf trace'
  (Arnaldo Carvalho de Melo)

- Display EXTRA features for 'make VF=1' build (Jiri Olsa)

- Add support for CoreSight trace decoding by making the perf tools
  use the external openCSD (Mathieu Poirier, Tor Jeremiassen)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-01-28 21:58:18 +01:00
Linus Torvalds
24b1cccf92 Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 retpoline fixlet from Thomas Gleixner:
 "Remove the ESP/RSP thunks for retpoline as they cannot ever work.

  Get rid of them before they show up in a release"

* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/retpoline: Remove the esp/rsp thunk
2018-01-28 12:24:36 -08:00
Linus Torvalds
32c6cdf75c Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
 "A set of small fixes for 4.15:

   - Fix vmapped stack synchronization on systems with 4-level paging
     and a large amount of memory caused by a missing 5-level folding
     which made the pgd synchronization logic to fail and causing double
     faults.

   - Add a missing sanity check in the vmalloc_fault() logic on 5-level
     paging systems.

   - Bring back protection against accessing a freed initrd in the
     microcode loader which was lost by a wrong merge conflict
     resolution.

   - Extend the Broadwell micro code loading sanity check.

   - Add a missing ENDPROC annotation in ftrace assembly code which
     makes ORC unhappy.

   - Prevent loading the AMD power module on !AMD platforms. The load
     itself is uncritical, but an unload attempt results in a kernel
     crash.

   - Update Peter Anvins role in the MAINTAINERS file"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ftrace: Add one more ENDPROC annotation
  x86: Mark hpa as a "Designated Reviewer" for the time being
  x86/mm/64: Tighten up vmalloc_fault() sanity checks on 5-level kernels
  x86/mm/64: Fix vmapped stack syncing on very-large-memory 4-level systems
  x86/microcode: Fix again accessing initrd after having been freed
  x86/microcode/intel: Extend BDW late-loading further with LLC size check
  perf/x86/amd/power: Do not load AMD power module on !AMD platforms
2018-01-28 12:19:23 -08:00
Linus Torvalds
07b0137c02 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
 "A single fix for a ~10 years old problem which causes high resolution
  timers to stop after a CPU unplug/plug cycle due to a stale flag in
  the per CPU hrtimer base struct.

  Paul McKenney was hunting this for about a year, but the heisenbug
  nature made it resistant against debug attempts for quite some time"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  hrtimer: Reset hrtimer cpu base proper on CPU hotplug
2018-01-28 12:17:35 -08:00
Linus Torvalds
624441927f Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Thomas Gleixner:
 "A single bug fix to prevent a subtle deadlock in the scheduler core
  code vs cpu hotplug"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Fix cpu.max vs. cpuhotplug deadlock
2018-01-28 11:51:45 -08:00
Linus Torvalds
39e383626c Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
 "Four patches which all address lock inversions and deadlocks in the
  perf core code and the Intel debug store"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Fix perf,x86,cpuhp deadlock
  perf/core: Fix ctx::mutex deadlock
  perf/core: Fix another perf,trace,cpuhp lock inversion
  perf/core: Fix lock inversion between perf,trace,cpuhp
2018-01-28 11:48:25 -08:00
Linus Torvalds
8c76e31a6a Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
 "Two final locking fixes for 4.15:

   - Repair the OWNER_DIED logic in the futex code which got wreckaged
     with the recent fix for a subtle race condition.

   - Prevent the hard lockup detector from triggering when dumping all
     held locks in the system"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/lockdep: Avoid triggering hardlockup from debug_show_all_locks()
  futex: Fix OWNER_DEAD fixup
2018-01-28 11:20:35 -08:00
Achilles Gaikwad
36c7ce4a17 fs/cifs/cifsacl.c Fixes typo in a comment
Signed-off-by: Achilles Gaikwad <achillesgaikwad@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2018-01-28 09:19:45 -06:00
Trond Myklebust
128159f292 NFS: Remove a redundant call to unmap_mapping_range()
We don't need to call unmap_mapping_range() prior to calling
nfs_sync_mapping().

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2018-01-28 09:35:54 -05:00
Josh Poimboeuf
dd085168a7 x86/ftrace: Add one more ENDPROC annotation
When ORC support was added for the ftrace_64.S code, an ENDPROC
for function_hook() was missed. This results in the following warning:

  arch/x86/kernel/ftrace_64.o: warning: objtool: .entry.text+0x0: unreachable instruction

Fixes: e2ac83d74a ("x86/ftrace: Fix ORC unwinding from ftrace handlers")
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20180128022150.dqierscqmt3uwwsr@treble
2018-01-28 09:19:12 +01:00
Borislav Petkov
64e16720ea x86/speculation: Simplify indirect_branch_prediction_barrier()
Make it all a function which does the WRMSR instead of having a hairy
inline asm.

[dwmw2: export it, fix CONFIG_RETPOLINE issues]

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ak@linux.intel.com
Cc: dave.hansen@intel.com
Cc: karahmed@amazon.de
Cc: arjan@linux.intel.com
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Cc: bp@alien8.de
Cc: pbonzini@redhat.com
Cc: tim.c.chen@linux.intel.com
Cc: gregkh@linux-foundation.org
Link: https://lkml.kernel.org/r/1517070274-12128-4-git-send-email-dwmw@amazon.co.uk
2018-01-27 19:10:45 +01:00
Borislav Petkov
1dde7415e9 x86/retpoline: Simplify vmexit_fill_RSB()
Simplify it to call an asm-function instead of pasting 41 insn bytes at
every call site. Also, add alignment to the macro as suggested here:

  https://support.google.com/faqs/answer/7625886

[dwmw2: Clean up comments, let it clobber %ebx and just tell the compiler]

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ak@linux.intel.com
Cc: dave.hansen@intel.com
Cc: karahmed@amazon.de
Cc: arjan@linux.intel.com
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Cc: bp@alien8.de
Cc: pbonzini@redhat.com
Cc: tim.c.chen@linux.intel.com
Cc: gregkh@linux-foundation.org
Link: https://lkml.kernel.org/r/1517070274-12128-3-git-send-email-dwmw@amazon.co.uk
2018-01-27 19:10:45 +01:00
David Woodhouse
2961298efe x86/cpufeatures: Clean up Spectre v2 related CPUID flags
We want to expose the hardware features simply in /proc/cpuinfo as "ibrs",
"ibpb" and "stibp". Since AMD has separate CPUID bits for those, use them
as the user-visible bits.

When the Intel SPEC_CTRL bit is set which indicates both IBRS and IBPB
capability, set those (AMD) bits accordingly. Likewise if the Intel STIBP
bit is set, set the AMD STIBP that's used for the generic hardware
capability.

Hide the rest from /proc/cpuinfo by putting "" in the comments. Including
RETPOLINE and RETPOLINE_AMD which shouldn't be visible there. There are
patches to make the sysfs vulnerabilities information non-readable by
non-root, and the same should apply to all information about which
mitigations are actually in use. Those *shouldn't* appear in /proc/cpuinfo.

The feature bit for whether IBPB is actually used, which is needed for
ALTERNATIVEs, is renamed to X86_FEATURE_USE_IBPB.

Originally-by: Borislav Petkov <bp@suse.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ak@linux.intel.com
Cc: dave.hansen@intel.com
Cc: karahmed@amazon.de
Cc: arjan@linux.intel.com
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Cc: bp@alien8.de
Cc: pbonzini@redhat.com
Cc: tim.c.chen@linux.intel.com
Cc: gregkh@linux-foundation.org
Link: https://lkml.kernel.org/r/1517070274-12128-2-git-send-email-dwmw@amazon.co.uk
2018-01-27 19:10:44 +01:00
Oleksandr Natalenko
6fbc4232a5 hwmon: (dell-smm) Disable fan support for Dell Vostro 3360
Calling fan related SMM functions implemented by Dell BIOS firmware on Dell
Vostro 3360 freeze kernel for about 500ms.

Unfortunately, it is unlikely for Dell to fix this since the machine
is pretty old, so this commit just disables fan support to make the
system usable again.

Via "force" module param fan support can be enabled.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=195751
Link: http://lkml.iu.edu/hypermail/linux/kernel/1711.2/06083.html
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-01-27 09:34:22 -08:00
Pali Rohár
f480ea90b9 hwmon: (dell-smm) Disable fan support for Dell Inspiron 7720
Calling fan related SMM functions implemented by Dell BIOS firmware on Dell
Inspiron 7720 freeze kernel for about 500ms. Until Dell fixes it we need to
disable fan support for Dell Inspiron 7720 as it makes system unusable.

Via "force" module param fan support can be enabled.

Reported-by: vova7890@mail.ru
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=195751
Cc: stable@vger.kernel.org # v4.0+, will need backport
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-01-27 09:34:03 -08:00
Pali Rohár
836ad11235 hwmon: (dell-smm) Enable broken functionality via "force" module param
Some Dell machines are broken and some functionality is disabled. Show
warning into dmesg about this fact and allow user via "force" module param
to override brokenness and enable broken functionality.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-01-27 09:33:38 -08:00
Thomas Gleixner
e383095c7f x86/cpu/bugs: Make retpoline module warning conditional
If sysfs is disabled and RETPOLINE not defined:

arch/x86/kernel/cpu/bugs.c:97:13: warning: ‘spectre_v2_bad_module’ defined but not used
[-Wunused-variable]
 static bool spectre_v2_bad_module;

Hide it.

Fixes: caf7501a1b ("module/retpoline: Warn about missing retpoline in module")
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
2018-01-27 15:45:14 +01:00
Thomas Gleixner
303c146df1 Merge branch 'timers/urgent' into timers/core
Pick up urgent bug fix and resolve the conflict.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2018-01-27 15:35:29 +01:00
Thomas Gleixner
d5421ea43d hrtimer: Reset hrtimer cpu base proper on CPU hotplug
The hrtimer interrupt code contains a hang detection and mitigation
mechanism, which prevents that a long delayed hrtimer interrupt causes a
continous retriggering of interrupts which prevent the system from making
progress. If a hang is detected then the timer hardware is programmed with
a certain delay into the future and a flag is set in the hrtimer cpu base
which prevents newly enqueued timers from reprogramming the timer hardware
prior to the chosen delay. The subsequent hrtimer interrupt after the delay
clears the flag and resumes normal operation.

If such a hang happens in the last hrtimer interrupt before a CPU is
unplugged then the hang_detected flag is set and stays that way when the
CPU is plugged in again. At that point the timer hardware is not armed and
it cannot be armed because the hang_detected flag is still active, so
nothing clears that flag. As a consequence the CPU does not receive hrtimer
interrupts and no timers expire on that CPU which results in RCU stalls and
other malfunctions.

Clear the flag along with some other less critical members of the hrtimer
cpu base to ensure starting from a clean state when a CPU is plugged in.

Thanks to Paul, Sebastian and Anna-Maria for their help to get down to the
root cause of that hard to reproduce heisenbug. Once understood it's
trivial and certainly justifies a brown paperbag.

Fixes: 41d2e49493 ("hrtimer: Tune hrtimer_interrupt hang logic")
Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Sewior <bigeasy@linutronix.de>
Cc: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801261447590.2067@nanos
2018-01-27 15:12:22 +01:00
H. Peter Anvin
8a95b74d50 x86: Mark hpa as a "Designated Reviewer" for the time being
Due to some unfortunate events, I have not been directly involved in
the x86 kernel patch flow for a while now.  I have also not been able
to ramp back up by now like I had hoped to, and after reviewing what I
will need to work on both internally at Intel and elsewhere in the near
term, it is clear that I am not going to be able to ramp back up until
late 2018 at the very earliest.

It is not acceptable to not recognize that this load is currently
taken by Ingo and Thomas without my direct participation, so I mark
myself as R: (designated reviewer) rather than M: (maintainer) until
further notice.  This is in fact recognizing the de facto situation
for the past few years.

I have obviously no intention of going away, and I will do everything
within my power to improve Linux on x86 and x86 for Linux.  This,
however, puts credit where it is due and reflects a change of focus.

This patch also removes stale entries for portions of the x86
architecture which have not been maintained separately from arch/x86
for a long time.  If there is a reason to re-introduce them then that
can happen later.

Signed-off-by: H. Peter Anvin <h.peter.anvin@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Bruce Schlobohm <bruce.schlobohm@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180125195934.5253-1-hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-01-27 10:11:00 +01:00
Linus Torvalds
c4e0ca7fa2 RISC-V: We have a new mailing list and git repo!
Sorry to send something essentially as late as possible (Friday after an
 rc9), but we managed to get a mailing list for the RISC-V Linux port.
 We've been using patches@groups.riscv.org for a while, but that list has
 some problems (it's Google Groups and it's shared over all RISC-V
 software projects).  The new infaread.org list is much better.   We just
 got it on Wednesday but I used it a bit on Thursday to shake out all the
 configuration problems and it appears to be in working order.
 
 When I updated the mailing list I noticed that the MAINTAINERS file was
 pointing to our github repo, but now that we have a kernel.org repo I'd
 like to point to that instead so I changed that as well.  We'll be
 centralizing all RISC-V Linux related development here as that seems to
 be the saner way to go about it.
 
 I can understand if it's too late to get this into 4.15, but given that
 it's not a code change I was hoping it'd still be OK.  It would be nice
 to have the new mailing list and git repo in the release tarballs so
 when people start to find bugs they'll get to the right place.
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Merge tag 'riscv-for-linus-4.15-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux

Pull RISC-V update from Palmer Dabbelt:
 "RISC-V: We have a new mailing list and git repo!

  Sorry to send something essentially as late as possible (Friday after
  an rc9), but we managed to get a mailing list for the RISC-V Linux
  port. We've been using patches@groups.riscv.org for a while, but that
  list has some problems (it's Google Groups and it's shared over all
  RISC-V software projects). The new infaread.org list is much better.
  We just got it on Wednesday but I used it a bit on Thursday to shake
  out all the configuration problems and it appears to be in working
  order.

  When I updated the mailing list I noticed that the MAINTAINERS file
  was pointing to our github repo, but now that we have a kernel.org
  repo I'd like to point to that instead so I changed that as well.
  We'll be centralizing all RISC-V Linux related development here as
  that seems to be the saner way to go about it.

  I can understand if it's too late to get this into 4.15, but given
  that it's not a code change I was hoping it'd still be OK. It would be
  nice to have the new mailing list and git repo in the release tarballs
  so when people start to find bugs they'll get to the right place"

* tag 'riscv-for-linus-4.15-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
  Update the RISC-V MAINTAINERS file
2018-01-26 15:10:50 -08:00
Steve French
ab2c643309 update internal version number for cifs.ko
To version 2.11

Signed-off-by: Steve French <smfrench@gmail.com>
2018-01-26 17:03:01 -06:00