We should prefer accessing CSRs using their CSR numbers because:
1. It compiles fine with older toolchains.
2. We can use latest CSR names in #define macro names of CSR numbers
as-per RISC-V spec.
3. We can access newly added CSRs even if toolchain does not recognize
newly addes CSRs by name.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This patch adds SCAUSE interrupt flag and SCAUSE interrupt related
defines to asm/csr.h. We also use these defines in kernel/irq.c and
express SIE/SIP flags in-terms of SCAUSE interrupt causes.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
The spacing between macro name and value is not consistent in
asm/csr.h. This patch beautifies asm/csr.h by using tabs to align
macro values instead of spaces.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
While working on the patches, I found some minor checkpatch issues.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
If nr_cpus command line option is set, maximum possible cpu should be
set to that value.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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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
...
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
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()
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
...
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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
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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()
- 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
...
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
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
...
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>
We've introduced power management logics for the Spreadtrum serial
controller by commit 062ec2774c8a ("serial: sprd: Add power management
for the Spreadtrum serial controller"), thus add related clock properties
to support this feature.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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>
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>
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>
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>
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>
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>
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>
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>
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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
* 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
- 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
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>
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
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
- ov2640 driver as module
- selecting HAVE_FB_ATMEL for SAMA5 SoCs is useless
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Merge tag 'at91-5.2-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into arm/late
AT91 defconfig for 5.2
- ov2640 driver as module
- selecting HAVE_FB_ATMEL for SAMA5 SoCs is useless
* tag 'at91-5.2-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
ARM: at91: sama5: make ov2640 as a module
ARM: at91: remove HAVE_FB_ATMEL for sama5 SoC as they use DRM
Signed-off-by: Olof Johansson <olof@lixom.net>
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
This contains one patch to disable the recently added XUSB support on
Jetson TX2 which is reported to cause boot and CPU hotplug failures in
some cases and doesn't allow the core power rail to be switched off.
Furthermore there are some changes to enable IOMMU support on more
devices. This is needed in order to prevent these devices from breaking
with the policy change in the ARM SMMU driver to break insecure devices
that is currently headed for v5.2.
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Merge tag 'tegra-for-5.2-arm64-dt-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/late
arm64: tegra: Device tree fixes for v5.2-rc1
This contains one patch to disable the recently added XUSB support on
Jetson TX2 which is reported to cause boot and CPU hotplug failures in
some cases and doesn't allow the core power rail to be switched off.
Furthermore there are some changes to enable IOMMU support on more
devices. This is needed in order to prevent these devices from breaking
with the policy change in the ARM SMMU driver to break insecure devices
that is currently headed for v5.2.
* tag 'tegra-for-5.2-arm64-dt-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
arm64: tegra: Disable XUSB support on Jetson TX2
arm64: tegra: Enable SMMU translation for PCI on Tegra186
arm64: tegra: Fix insecure SMMU users for Tegra186
Signed-off-by: Olof Johansson <olof@lixom.net>
This enables the ARM_GIC_PM driver by default for Tegra in order to
increase build coverage.
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Merge tag 'tegra-for-5.2-arm64-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/late
arm64: tegra: Core fixes for v5.2-rc1
This enables the ARM_GIC_PM driver by default for Tegra in order to
increase build coverage.
* tag 'tegra-for-5.2-arm64-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
arm64: tegra: Select ARM_GIC_PM
Signed-off-by: Olof Johansson <olof@lixom.net>
This contains a single fix for a potential PM-related build issue.
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Merge tag 'tegra-for-5.2-bus-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/late
bus/tegra: Fixes for v5.2-rc1
This contains a single fix for a potential PM-related build issue.
* tag 'tegra-for-5.2-bus-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
amba: tegra-ahb: Mark PM functions as __maybe_unused
Signed-off-by: Olof Johansson <olof@lixom.net>
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
A few months ago, I submitted a trivial arm64 defconfig update.
get_maintainer.pl now outputs my address for every defconfig tweak.
Add me to .get_maintainer.ignore to opt out of these notifications.
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Olof Johansson <olof@lixom.net>
arm32 socfpga_defconfig updates for v5.2
- Enable LTC2497 driver
- Enable support for large block devices
* tag 'socfpga_arm32_defconfig_for_v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux:
ARM: socfpga_defconfig: enable LTC2497
ARM: socfpga_defconfig: enable support for large block devices
Signed-off-by: Olof Johansson <olof@lixom.net>
NXP/FSL soc driver fixes for v5.1
QE drivers
- Fix an error path in qe_pin_request()
* tag 'soc-fsl-fix-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/leo/linux:
soc/fsl/qe: Fix an error code in qe_pin_request()
Signed-off-by: Olof Johansson <olof@lixom.net>
mvebu arm for 5.2 (part 1)
- remove improper error message on kirkwood
- a couple a clean-up patch generated from automatic tools
- clean-up in assembly code allowing using LLVM
* tag 'mvebu-arm-5.2-1' of git://git.infradead.org/linux-mvebu:
ARM: mvebu: drop return from void function
ARM: mvebu: prefix coprocessor operand with p
ARM: mvebu: drop unnecessary label
ARM: mvebu: fix a leaked reference by adding missing of_node_put
ARM: mvebu: kirkwood: remove error message when retrieving mac address
Signed-off-by: Olof Johansson <olof@lixom.net>
Two regression fixes for omaps
Two one-liners to fix board-ams-delta booting regression and
logicpd-som-lv MMC card detect to use GPIO_ACTIVE_LOW instead of
IRQ_TYPE_LEVEL_LOW. Note that the board-ams-delta regression has
been in there already since v5.0, so if necessary these can wait
for the merge window.
* tag 'omap-for-v5.1/fixes-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: logicpd-som-lv: Fix MMC1 card detect
ARM: OMAP1: ams-delta: fix early boot crash when LED support is disabled
Signed-off-by: Olof Johansson <olof@lixom.net>
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>
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()
With this patch, we can use the 'percore' event qualifier in perf-stat.
root@skl:/tmp# perf stat -e cpu/event=0,umask=0x3,percore=1/,cpu/event=0,umask=0x3/ -a -A -I1000
1.000773050 S0-C0 98,352,832 cpu/event=0,umask=0x3,percore=1/ (50.01%)
1.000773050 S0-C1 103,763,057 cpu/event=0,umask=0x3,percore=1/ (50.02%)
1.000773050 S0-C2 196,776,995 cpu/event=0,umask=0x3,percore=1/ (50.02%)
1.000773050 S0-C3 176,493,779 cpu/event=0,umask=0x3,percore=1/ (50.02%)
1.000773050 CPU0 47,699,641 cpu/event=0,umask=0x3/ (50.02%)
1.000773050 CPU1 49,052,451 cpu/event=0,umask=0x3/ (49.98%)
1.000773050 CPU2 102,771,422 cpu/event=0,umask=0x3/ (49.98%)
1.000773050 CPU3 100,784,662 cpu/event=0,umask=0x3/ (49.98%)
1.000773050 CPU4 43,171,342 cpu/event=0,umask=0x3/ (49.98%)
1.000773050 CPU5 54,152,158 cpu/event=0,umask=0x3/ (49.98%)
1.000773050 CPU6 93,618,410 cpu/event=0,umask=0x3/ (49.98%)
1.000773050 CPU7 74,477,589 cpu/event=0,umask=0x3/ (49.99%)
In this example, we count the event 'ref-cycles' per-core and per-CPU in
one perf stat command-line. From the output, we can see:
S0-C0 = CPU0 + CPU4
S0-C1 = CPU1 + CPU5
S0-C2 = CPU2 + CPU6
S0-C3 = CPU3 + CPU7
So the result is expected (tiny difference is ignored).
Note that, the 'percore' event qualifier needs to use with option '-A'.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1555077590-27664-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Move the aggregate counts printing to a new function
print_counter_aggrdata, which will be used in following patches.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1555077590-27664-3-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Anup Patel