SCHED_CLS seems to be a better option as a default guess for freplace
programs that have __sk_buff as a context type.
Reported-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230330190115.3942962-1-andrii@kernel.org
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Evidently Gregory sent this file but I (apparently every else) missed
it entirely, remove that.
Fixes: cf85123a21 ("wifi: iwlwifi: mvm: support enabling and disabling HW timestamping")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
- i915 fixes for color mgmt, psr, lmem flush, hibernate oops, and more
- amdgpu: dp mst and hibernate regression fix
- etnaviv: revert fdinfo support (incl drm/sched revert), leak fix
- misc ivpu fixes, nouveau backlight, drm buddy allocator 32bit fixes
-----BEGIN PGP SIGNATURE-----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=nO9/
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-2023-03-30' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Daniel Vetter:
"Two regression fixes in here, otherwise just the usual stuff:
- i915 fixes for color mgmt, psr, lmem flush, hibernate oops, and
more
- amdgpu: dp mst and hibernate regression fix
- etnaviv: revert fdinfo support (incl drm/sched revert), leak fix
- misc ivpu fixes, nouveau backlight, drm buddy allocator 32bit
fixes"
* tag 'drm-fixes-2023-03-30' of git://anongit.freedesktop.org/drm/drm: (27 commits)
Revert "drm/scheduler: track GPU active time per entity"
Revert "drm/etnaviv: export client GPU usage statistics via fdinfo"
drm/etnaviv: fix reference leak when mmaping imported buffer
drm/amdgpu: allow more APUs to do mode2 reset when go to S4
drm/amd/display: Take FEC Overhead into Timeslot Calculation
drm/amd/display: Add DSC Support for Synaptics Cascaded MST Hub
drm: test: Fix 32-bit issue in drm_buddy_test
drm: buddy_allocator: Fix buddy allocator init on 32-bit systems
drm/nouveau/kms: Fix backlight registration
drm/i915/perf: Drop wakeref on GuC RC error
drm/i915/dpt: Treat the DPT BO as a framebuffer
drm/i915/gem: Flush lmem contents after construction
drm/i915/tc: Fix the ICL PHY ownership check in TC-cold state
drm/i915: Disable DC states for all commits
drm/i915: Workaround ICL CSC_MODE sticky arming
drm/i915: Add a .color_post_update() hook
drm/i915: Move CSC load back into .color_commit_arm() when PSR is enabled on skl/glk
drm/i915: Split icl_color_commit_noarm() from skl_color_commit_noarm()
drm/i915/pmu: Use functions common with sysfs to read actual freq
accel/ivpu: Fix IPC buffer header status field value
...
Currently, offloaded conntrack entries (flows) can only be deleted
after they are removed from offload, which is either by timeout,
tcp state change or tc ct rule deletion. This can cause issues for
users wishing to manually delete or flush existing entries.
Support deletion of offloaded conntrack entries.
Example usage:
# Delete all offloaded (and non offloaded) conntrack entries
# whose source address is 1.2.3.4
$ conntrack -D -s 1.2.3.4
# Delete all entries
$ conntrack -F
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
NFTA_RANGE_OP incorrectly says nft_cmp_ops instead of nft_range_ops.
NFTA_LOG_GROUP and NFTA_LOG_QTHRESHOLD claim NLA_U32 instead of NLA_U16
NFTA_EXTHDR_SREG isn't documented as a register
Signed-off-by: Matthieu De Beule <matthieu.debeule@proton.ch>
Signed-off-by: Florian Westphal <fw@strlen.de>
This enables associating a socket with a v1 net_cls cgroup. Useful for
applying a per-cgroup policy when processing packets in userspace.
Signed-off-by: Eric Sage <eric_sage@apple.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
structure is free'd via call_rcu, so its safe to use rcu_read_lock only.
While at it, skip rcu_read_lock for lookup from packet path, its always
called with rcu held.
Signed-off-by: Florian Westphal <fw@strlen.de>
Zero-length arrays as fake flexible arrays are deprecated and we are
moving towards adopting C99 flexible-array members instead.
Address the following warning found with GCC-13 and
-fstrict-flex-arrays=3 enabled:
net/ipv6/exthdrs.c: In function ‘fl6_update_dst’:
net/ipv6/exthdrs.c:1393:28: warning: array subscript 0 is outside array bounds of ‘struct in6_addr[0]’ [-Warray-bounds=]
1393 | fl6->daddr = *((struct rt0_hdr *)opt->srcrt)->addr;
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ./include/linux/ipv6.h:5,
from ./include/linux/icmpv6.h:6,
from net/ipv6/exthdrs.c:27:
./include/uapi/linux/ipv6.h:84:33: note: while referencing ‘addr’
84 | struct in6_addr addr[0];
| ^~~~
net/ipv6/exthdrs.c: In function ‘ipv6_push_rthdr0.isra’:
net/ipv6/exthdrs.c:1125:19: warning: array subscript <unknown> is outside array bounds of ‘struct in6_addr[0]’ [-Warray-bounds=]
1125 | phdr->addr[hops - 1] = **addr_p;
| ~~~~~~~~~~^~~~~~~~~~
./include/uapi/linux/ipv6.h:84:33: note: while referencing ‘addr’
84 | struct in6_addr addr[0];
| ^~~~
This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
routines on memcpy() and help us make progress towards globally
enabling -fstrict-flex-arrays=3 [1].
Link: https://github.com/KSPP/linux/issues/21
Link: https://github.com/KSPP/linux/issues/276
Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Both bufio and bio-prison-v1 use the identical model for splitting
their respective locks and rbtrees. Improve dm_num_hash_locks() to
distribute across more rbtrees to improve overall performance -- but
the maximum number of locks/rbtrees is still 64.
Also factor out a common hash function named dm_hash_locks_index(),
the magic numbers used were determined to be best using this program:
https://gist.github.com/jthornber/e05c47daa7b500c56dc339269c5467fc
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Add num_locks member to dm_bio_prison struct and use it rather than
the NR_LOCKS magic value (64).
Next commit will size the dm_bio_prison's prison_regions according to
dm_num_hash_locks().
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Add num_locks member to dm_buffer_cache struct and use it rather than
the NR_LOCKS magic value (64).
Next commit will size the dm_buffer_cache's buffer_trees according to
dm_num_hash_locks().
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Simple helper to use when DM core code needs to appropriately size,
based on num_online_cpus(), its data structures that split locks.
dm_num_hash_locks() rounds up num_online_cpus() to next power of 2
but caps return at DM_HASH_LOCKS_MAX (64).
This heuristic may evolve as warranted, but as-is it will serve as a
more informed basis for sizing the sharded lock structs in dm-bufio's
dm_buffer_cache (buffer_trees) and dm-bio-prison-v1's dm_bio_prison
(prison_regions).
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Don't have bio_detain() BUG_ON if a dm_cell_key is beyond
BIO_PRISON_MAX_RANGE or spans a boundary.
Update dm-thin.c:build_key() to use dm_cell_key_has_valid_range() which
will do this checking without using BUG_ON. Also update
process_discard_bio() to check the discard bio that DM core passes in
(having first imposed max_discard_granularity based splitting).
dm_cell_key_has_valid_range() will merely WARN_ON_ONCE if it returns
false because if it does: it is programmer error that should be caught
with proper testing. So relax the BUG_ONs to be WARN_ON_ONCE.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Split the bio prison into multiple regions, with a separate rbtree and
associated lock for each region.
To get fast bio prison locking and not damage the performance of
discards too much the bio-prison now stipulates that discards should
not cross a BIO_PRISON_MAX_RANGE boundary.
Because the range of a key (block_end - block_begin) must not exceed
BIO_PRISON_MAX_RANGE: break_up_discard_bio() now ensures the data
range reflected in PHYSICAL key doesn't exceed BIO_PRISON_MAX_RANGE.
And splitting the thin target's discards (handled with VIRTUAL key) is
achieved by updating dm-thin.c to set limits->max_discard_sectors in
terms of BIO_PRISON_MAX_RANGE _and_ setting the thin and thin-pool
targets' max_discard_granularity to true.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
The block core (bio_split_discard) will already split discards based
on the 'discard_granularity' and 'max_discard_sectors' queue_limits.
But the DM thin target also needs to ensure that it doesn't receive a
discard that spans a 'max_discard_sectors' boundary.
Introduce a dm_target 'max_discard_granularity' flag that if set will
cause DM core to split discard bios relative to 'max_discard_sectors'.
This treats 'discard_granularity' as a "min_discard_granularity" and
'max_discard_sectors' as a "max_discard_granularity".
Requested-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Reduce the time that a spinlock is held in cell_defer_no_holder().
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
The kernel supports multi page bio vector entries, so we can use them
in dm-bufio as an optimization.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Save one spinlock by using waitqueue_active. We hold the bufio lock at
this place, so no one can add entries to the waitqueue at this point.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Movement also consolidates holes in dm_bufio_client struct. But the
overall size of the struct isn't changed.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Sometimes it is beneficial to repeatedly get and drop locks as part of
an iteration. Introduce lock_history struct to help avoid redundant
drop and gets of the same lock.
Optimizes cache_iterate, cache_mark_many and cache_evict.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
When multiple threads perform IO to a thin device, the underlying
dm_bufio object can become a bottleneck; slowing down access to btree
nodes that store the thin metadata. Prior to this commit, each bufio
instance had a single mutex that was taken for every bufio operation.
This commit concentrates on improving the common case where: a user of
dm_bufio wishes to access, but not modify, a buffer which is already
within the dm_bufio cache.
Implementation::
The code has been refactored; pulling out an 'lru' abstraction and a
'buffer cache' abstraction (see 2 previous commits). This commit
updates higher level bufio code (that performs allocation of buffers,
IO and eviction/cache sizing) to leverage both abstractions. It also
deals with the delicate locking requirements of both abstractions to
provide finer grained locking. The result is significantly better
concurrent IO performance.
Before this commit, bufio has a global lru list it used to evict the
oldest, clean buffers from _all_ clients. With the new locking we
don’t want different ways to access the same buffer, so instead
do_global_cleanup() loops around the clients asking them to free
buffers older than a certain time.
This commit also converts many old BUG_ONs to WARN_ON_ONCE, see the
lru_evict and cache_evict code in particular. They will return
ER_DONT_EVICT if a given buffer somehow meets the invariants that
should _never_ happen. [Aside from revising this commit's header and
fixing coding style and whitespace nits: this switching to
WARN_ON_ONCE is Mike Snitzer's lone contribution to this commit]
Testing::
Some of the low level functions have been unit tested using dm-unit:
https://github.com/jthornber/dm-unit/blob/main/src/tests/bufio.rs
Higher level concurrency and IO is tested via a test only target
found here:
https://github.com/jthornber/linux/blob/2023-03-24-thin-concurrency-9/drivers/md/dm-bufio-test.c
The associated userland side of these tests is here:
https://github.com/jthornber/dmtest-python/blob/main/src/dmtest/bufio/bufio_tests.py
In addition the full dmtest suite of tests (dm-thin, dm-cache, etc)
has been run (~450 tests).
Performance::
Most bufio operations have unchanged performance. But if multiple
threads are attempting to get buffers concurrently, and these
buffers are already in the cache then there's a big speed up. Eg,
one test has 16 'hotspot' threads simulating btree lookups while
another thread dirties the whole device. In this case the hotspot
threads acquire the buffers about 25 times faster.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
The buffer cache is responsible for managing the holder count,
tracking clean/dirty state, and choosing buffers via predicates.
Higher level code is responsible for allocation of buffers, IO and
eviction/cache sizing.
The buffer cache has thread safe methods for acquiring a reference
to an existing buffer. All other methods in buffer cache are _not_
threadsafe, and only contain enough locking to guarantee the safe
methods.
Rather than a single mutex, sharded rw_semaphores are used to allow
concurrent threads to 'get' buffers. Each rw_semaphore protects its
own rbtree of buffer entries.
Code that uses this new dm_buffer_cache abstraction will be introduced
in a following commit.
This commit moves the dm_buffer struct in preparation for finer grained
dm_buffer changes, in the next commit, to be more easily seen. It also
introduces temporary dm_buffer struct members to allow compilation of
this intermediate commit (they will be elided in the next commit).
This commit will cause "defined but not used" compiler warnings that
will be resolved by the next commit.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
A CLOCK algorithm is used in this LRU abstraction. This avoids
relinking list nodes, which would require a write lock protecting it.
None of the LRU methods are threadsafe; locking must be done at a
higher level.
Code that uses this new LRU will be introduced in the next 2 commits.
As such, this commit will cause "defined but not used" compiler warnings
that will be resolved by the next 2 commits.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Reasonable to relax to WARN_ON because these are easily avoided but do
offer some assurance future coding mistakes won't occur (if changes
tested properly).
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
All these instances are entirely avoidable given that they speak to
coding mistakes that result in inappropriate use. Proper testing during
development will catch any such coding bug so its best to relax all of
these from BUG_ON to WARN_ON_ONCE.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Was used by multi-snapshot DM target that never went upstream.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Commit 7dd76d1fee ("dm: improve bio splitting and associated IO
accounting") only called setup_split_accounting() from
__send_duplicate_bios() if a single bio were being issued. But the case
where duplicate bios are issued must call it too.
Otherwise the bio won't be split and resubmitted (via recursion through
block core back to DM) to submit the later portions of a bio (which may
map to an entirely different target).
For example, when discarding an entire DM striped device with the
following DM table:
vg-lvol0: 0 159744 striped 2 128 7:0 2048 7:1 2048
vg-lvol0: 159744 45056 striped 2 128 7:2 2048 7:3 2048
Before (broken, discards the first striped target's devices twice):
device-mapper: striped: target_stripe=0, bdev=7:0, start=2048 len=79872
device-mapper: striped: target_stripe=1, bdev=7:1, start=2048 len=79872
device-mapper: striped: target_stripe=0, bdev=7:0, start=2049 len=22528
device-mapper: striped: target_stripe=1, bdev=7:1, start=2048 len=22528
After (works as expected):
device-mapper: striped: target_stripe=0, bdev=7:0, start=2048 len=79872
device-mapper: striped: target_stripe=1, bdev=7:1, start=2048 len=79872
device-mapper: striped: target_stripe=0, bdev=7:2, start=2048 len=22528
device-mapper: striped: target_stripe=1, bdev=7:3, start=2048 len=22528
Fixes: 7dd76d1fee ("dm: improve bio splitting and associated IO accounting")
Cc: stable@vger.kernel.org
Reported-by: Orange Kao <orange@aiven.io>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
"Abnormal" bios include discards, write zeroes and secure erase. By no
longer passing the calculated 'len' pointer, commit 7dd06a2548 ("dm:
allow dm_accept_partial_bio() for dm_io without duplicate bios") took a
senseless approach to disallowing dm_accept_partial_bio() from working
for duplicate bios processed using __send_duplicate_bios().
It inadvertently and incorrectly stopped the use of 'len' when
initializing a target's io (in alloc_tio). As such the resulting tio
could address more area of a device than it should.
For example, when discarding an entire DM striped device with the
following DM table:
vg-lvol0: 0 159744 striped 2 128 7:0 2048 7:1 2048
vg-lvol0: 159744 45056 striped 2 128 7:2 2048 7:3 2048
Before this fix:
device-mapper: striped: target_stripe=0, bdev=7:0, start=2048 len=102400
blkdiscard: attempt to access beyond end of device
loop0: rw=2051, sector=2048, nr_sectors = 102400 limit=81920
device-mapper: striped: target_stripe=1, bdev=7:1, start=2048 len=102400
blkdiscard: attempt to access beyond end of device
loop1: rw=2051, sector=2048, nr_sectors = 102400 limit=81920
After this fix;
device-mapper: striped: target_stripe=0, bdev=7:0, start=2048 len=79872
device-mapper: striped: target_stripe=1, bdev=7:1, start=2048 len=79872
Fixes: 7dd06a2548 ("dm: allow dm_accept_partial_bio() for dm_io without duplicate bios")
Cc: stable@vger.kernel.org
Reported-by: Orange Kao <orange@aiven.io>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Wa_22015279794 applies to MTL P from stepping A0 to B0 (exclusive).
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230329212336.106161-3-gustavo.sousa@intel.com
Both workarounds require the same implementation and apply to MTL P and
M from stepping A0 to B0 (exclusive).
v2:
- Remove unrelated brace removal. (Matt)
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230329212336.106161-2-gustavo.sousa@intel.com
sam9x60ek populates an sst26vf064b SPI NOR flash. Its maximum operating
frequency for 2.7-3.6V is 104 MHz. As the flash is operated at 3.3V,
increase its maximum supported frequency to 104MHz. The increasing of the
spi-max-frequency value requires the setting of the
"CE# Not Active Hold Time", thus set the spi-cs-setup-ns to a value of 7.
The sst26vf064b datasheet specifies just a minimum value for the
"CE# Not Active Hold Time" and it advertises it to 5 ns. There's no
maximum time specified. I determined experimentally that 5 ns for the
spi-cs-setup-ns is not enough when the flash is operated close to its
maximum frequency and tests showed that 7 ns is just fine, so set the
spi-cs-setup-ns dt property to 7.
With the increase of frequency the reads are now faster with ~33%.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20230328101517.1595738-5-tudor.ambarus@linaro.org
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
sama5d2_icp populates an sst26vf064b SPI NOR flash. Its maximum operating
frequency for 2.7-3.6V is 104 MHz. As the flash is operated at 3.3V,
increase its maximum supported frequency to 104MHz. The increasing of the
spi-max-frequency value requires the setting of the
"CE# Not Active Hold Time", thus set the spi-cs-setup-ns to a value of 7.
The sst26vf064b datasheet specifies just a minimum value for the
"CE# Not Active Hold Time" and it advertises it to 5 ns. There's no
maximum time specified. I determined experimentally that 5 ns for the
spi-cs-setup-ns is not enough when the flash is operated close to its
maximum frequency and tests showed that 7 ns is just fine, so set the
spi-cs-setup-ns dt property to 7.
With the increase of frequency the reads are now faster with ~37%.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Tested-by: Nicolas Ferre <nicolas.ferre@microchip.com> # on sama5d2 ICP
Link: https://lore.kernel.org/r/20230328101517.1595738-4-tudor.ambarus@linaro.org
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
sama5d27-som1 populates an sst26vf064b SPI NOR flash. Its maximum
operating frequency for 2.7-3.6V is 104 MHz. As the flash is operated
at 3.3V, increase its maximum supported frequency to 104MHz. The
increasing of the spi-max-frequency value requires the setting of the
"CE# Not Active Hold Time", thus set the spi-cs-setup-ns to a value of 7.
The sst26vf064b datasheet specifies just a minimum value for the
"CE# Not Active Hold Time" and it advertises it to 5 ns. There's no
maximum time specified. I determined experimentally that 5 ns for the
spi-cs-setup-ns is not enough when the flash is operated close to its
maximum frequency and tests showed that 7 ns is just fine, so set the
spi-cs-setup-ns dt property to 7.
With the increase of frequency the reads are now faster with ~37%.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20230328101517.1595738-3-tudor.ambarus@linaro.org
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
sama5d27-wlsom1 populates an sst26vf064b SPI NOR flash. Its maximum
operating frequency for 2.7-3.6V is 104 MHz. As the flash is operated
at 3.3V, increase its maximum supported frequency to 104MHz. The
increasing of the spi-max-frequency value requires the setting of the
"CE# Not Active Hold Time", thus set the spi-cs-setup-ns to a value of 7.
The sst26vf064b datasheet specifies just a minimum value for the
"CE# Not Active Hold Time" and it advertises it to 5 ns. There's no
maximum time specified. I determined experimentally that 5 ns for the
spi-cs-setup-ns is not enough when the flash is operated close to its
maximum frequency and tests showed that 7 ns is just fine, so set the
spi-cs-setup-ns dt property to 7.
With the increase of frequency the reads are now faster with ~37%.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20230328101517.1595738-2-tudor.ambarus@linaro.org
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy. Move
Documentation/nios2 into arch/ and fix all in-tree references.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy. Move
Documentation/openrisc into arch/ and fix all in-tree references.
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Stafford Horne <shorne@gmail.com>
Acked-by: Alex Shi <alexs@kernel.org>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy. Move
Documentation/sh into arch/ and fix all in-tree references.
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy. Move
Documentation/sparc into arch/ and fix all in-tree references.
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy. Move
Documentation/xtensa into arch/ and fix all in-tree references.
Cc: Chris Zankel <chris@zankel.net>
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This mirrors commit 4f1bb0386d ("docs: create a top-level arch/
directory"), creating a top-level directory to hold architecture-specific
documentation.
Acked-by: Alex Shi <alexs@kernel.org>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Move the x86 documentation under Documentation/arch/ as a way of cleaning
up the top-level directory and making the structure of our docs more
closely match the structure of the source directories it describes.
All in-kernel references to the old paths have been updated.
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-arch@vger.kernel.org
Cc: x86@kernel.org
Cc: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/lkml/20230315211523.108836-1-corbet@lwn.net/
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties.
Convert reading boolean properties to of_property_read_bool().
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20230310144706.1542295-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
The cache needs to be flushed to ensure that the hardware stops offloading
the flow immediately.
Fixes: 33fc42de33 ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230330120840.52079-3-nbd@nbd.name
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Check for skb metadata in order to detect the case where the DSA header
is not present.
Fixes: 2d7605a729 ("net: ethernet: mtk_eth_soc: enable hardware DSA untagging")
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230330120840.52079-2-nbd@nbd.name
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since we call flow_block_cb_decref on FLOW_BLOCK_UNBIND, we also need to
call flow_block_cb_incref for a newly allocated cb.
Also fix the accidentally inverted refcount check on unbind.
Fixes: 502e84e238 ("net: ethernet: mtk_eth_soc: add flow offloading support")
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230330120840.52079-1-nbd@nbd.name
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reported on the Turris forum, mvneta provokes kernel warnings in the
architecture DMA mapping code when mvneta_setup_txqs() fails to
allocate memory. This happens because when mvneta_cleanup_txqs() is
called in the mvneta_stop() path, we leave pointers in the structure
that have been freed.
Then on mvneta_open(), we call mvneta_setup_txqs(), which starts
allocating memory. On memory allocation failure, mvneta_cleanup_txqs()
will walk all the queues freeing any non-NULL pointers - which includes
pointers that were previously freed in mvneta_stop().
Fix this by setting these pointers to NULL to prevent double-freeing
of the same memory.
Fixes: 2adb719d74 ("net: mvneta: Implement software TSO")
Link: https://forum.turris.cz/t/random-kernel-exceptions-on-hbl-tos-7-0/18865/8
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1phUe5-00EieL-7q@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
"ranges" is a standard property and we have common helper functions for
parsing it, so let's use them.
Tested-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/20230206194503.1162108-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
