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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/iio driver fixes from Greg KH:
"Here are some small char/misc/iio and some other minor driver
subsystem fixes for 6.19-rc7. Nothing huge here, just some fixes for
reported issues including:
- lots of little iio driver fixes
- comedi driver fixes
- mux driver fix
- w1 driver fixes
- uio driver fix
- slimbus driver fixes
- hwtracing bugfix
- other tiny bugfixes
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-6.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (36 commits)
comedi: dmm32at: serialize use of paged registers
mei: trace: treat reg parameter as string
uio: pci_sva: correct '-ENODEV' check logic
uacce: ensure safe queue release with state management
uacce: implement mremap in uacce_vm_ops to return -EPERM
uacce: fix isolate sysfs check condition
uacce: fix cdev handling in the cleanup path
slimbus: core: clean up of_slim_get_device()
slimbus: core: fix of_slim_get_device() kernel doc
slimbus: core: amend slim_get_device() kernel doc
slimbus: core: fix device reference leak on report present
slimbus: core: fix runtime PM imbalance on report present
slimbus: core: fix OF node leak on registration failure
intel_th: rename error label
intel_th: fix device leak on output open()
comedi: Fix getting range information for subdevices 16 to 255
mux: mmio: Fix IS_ERR() vs NULL check in probe()
interconnect: debugfs: initialize src_node and dst_node to empty strings
iio: dac: ad3552r-hs: fix out-of-bound write in ad3552r_hs_write_data_source
iio: accel: iis328dq: fix gain values
...
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git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core fixes from Danilo Krummrich:
- Always inline I/O and IRQ methods using build_assert!() to avoid
false positive build errors
- Do not free the driver's device private data in I2C shutdown()
avoiding race conditions that can lead to UAF bugs
- Drop the driver's device private data after the driver has been
fully unbound from its device to avoid UAF bugs from &Device<Bound>
scopes, such as IRQ callbacks
* tag 'driver-core-6.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
rust: driver: drop device private data post unbind
rust: driver: add DriverData type to the DriverLayout trait
rust: driver: add DEVICE_DRIVER_OFFSET to the DriverLayout trait
rust: driver: introduce a DriverLayout trait
rust: auxiliary: add Driver::unbind() callback
rust: i2c: do not drop device private data on shutdown()
rust: irq: always inline functions using build_assert with arguments
rust: io: always inline functions using build_assert with arguments
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
- A patch series from David Hildenbrand which fixes a few things
related to hugetlb PMD sharing
- The remainder are singletons, please see their changelogs for details
* tag 'mm-hotfixes-stable-2026-01-20-13-09' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mm: restore per-memcg proactive reclaim with !CONFIG_NUMA
mm/kfence: fix potential deadlock in reboot notifier
Docs/mm/allocation-profiling: describe sysctrl limitations in debug mode
mm: do not copy page tables unnecessarily for VM_UFFD_WP
mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather
mm/rmap: fix two comments related to huge_pmd_unshare()
mm/hugetlb: fix two comments related to huge_pmd_unshare()
mm/hugetlb: fix hugetlb_pmd_shared()
mm: remove unnecessary and incorrect mmap lock assert
x86/kfence: avoid writing L1TF-vulnerable PTEs
mm/vma: do not leak memory when .mmap_prepare swaps the file
migrate: correct lock ordering for hugetlb file folios
panic: only warn about deprecated panic_print on write access
fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()
mm: take into account mm_cid size for mm_struct static definitions
mm: rename cpu_bitmap field to flexible_array
mm: add missing static initializer for init_mm::mm_cid.lock
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git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
Pull dma-mapping fixes from Marek Szyprowski:
- minor fixes for the corner cases of the SWIOTLB pool management
(Robin Murphy)
* tag 'dma-mapping-6.19-2026-01-20' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
dma/pool: Avoid allocating redundant pools
mm_zone: Generalise has_managed_dma()
dma/pool: Improve pool lookup
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Commit ab04b530e7e8 ("mm: introduce copy-on-fork VMAs and make
VM_MAYBE_GUARD one") aggregates flags checks in vma_needs_copy(),
including VM_UFFD_WP.
However in doing so, it incorrectly performed this check against src_vma.
This check was done on the assumption that all relevant flags are copied
upon fork.
However the userfaultfd logic is very innovative in that it implements
custom logic on fork in dup_userfaultfd(), including a rather well hidden
case where lacking UFFD_FEATURE_EVENT_FORK causes VM_UFFD_WP to not be
propagated to the destination VMA.
And indeed, vma_needs_copy(), prior to this patch, did check this property
on dst_vma, not src_vma.
Since all the other relevant flags are copied on fork, we can simply fix
this by checking against dst_vma.
While we're here, we fix a comment against VM_COPY_ON_FORK (noting that it
did indeed already reference dst_vma) to make it abundantly clear that we
must check against the destination VMA.
Link: https://lkml.kernel.org/r/20260114110006.1047071-1-lorenzo.stoakes@oracle.com
Fixes: ab04b530e7e8 ("mm: introduce copy-on-fork VMAs and make VM_MAYBE_GUARD one")
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reported-by: Chris Mason <clm@meta.com>
Closes: https://lore.kernel.org/all/20260113231257.3002271-1-clm@meta.com/
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Acked-by: Pedro Falcato <pfalcato@suse.de>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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mmu_gather
As reported, ever since commit 1013af4f585f ("mm/hugetlb: fix
huge_pmd_unshare() vs GUP-fast race") we can end up in some situations
where we perform so many IPI broadcasts when unsharing hugetlb PMD page
tables that it severely regresses some workloads.
In particular, when we fork()+exit(), or when we munmap() a large
area backed by many shared PMD tables, we perform one IPI broadcast per
unshared PMD table.
There are two optimizations to be had:
(1) When we process (unshare) multiple such PMD tables, such as during
exit(), it is sufficient to send a single IPI broadcast (as long as
we respect locking rules) instead of one per PMD table.
Locking prevents that any of these PMD tables could get reused before
we drop the lock.
(2) When we are not the last sharer (> 2 users including us), there is
no need to send the IPI broadcast. The shared PMD tables cannot
become exclusive (fully unshared) before an IPI will be broadcasted
by the last sharer.
Concurrent GUP-fast could walk into a PMD table just before we
unshared it. It could then succeed in grabbing a page from the
shared page table even after munmap() etc succeeded (and supressed
an IPI). But there is not difference compared to GUP-fast just
sleeping for a while after grabbing the page and re-enabling IRQs.
Most importantly, GUP-fast will never walk into page tables that are
no-longer shared, because the last sharer will issue an IPI
broadcast.
(if ever required, checking whether the PUD changed in GUP-fast
after grabbing the page like we do in the PTE case could handle
this)
So let's rework PMD sharing TLB flushing + IPI sync to use the mmu_gather
infrastructure so we can implement these optimizations and demystify the
code at least a bit. Extend the mmu_gather infrastructure to be able to
deal with our special hugetlb PMD table sharing implementation.
To make initialization of the mmu_gather easier when working on a single
VMA (in particular, when dealing with hugetlb), provide
tlb_gather_mmu_vma().
We'll consolidate the handling for (full) unsharing of PMD tables in
tlb_unshare_pmd_ptdesc() and tlb_flush_unshared_tables(), and track
in "struct mmu_gather" whether we had (full) unsharing of PMD tables.
Because locking is very special (concurrent unsharing+reuse must be
prevented), we disallow deferring flushing to tlb_finish_mmu() and instead
require an explicit earlier call to tlb_flush_unshared_tables().
From hugetlb code, we call huge_pmd_unshare_flush() where we make sure
that the expected lock protecting us from concurrent unsharing+reuse is
still held.
Check with a VM_WARN_ON_ONCE() in tlb_finish_mmu() that
tlb_flush_unshared_tables() was properly called earlier.
Document it all properly.
Notes about tlb_remove_table_sync_one() interaction with unsharing:
There are two fairly tricky things:
(1) tlb_remove_table_sync_one() is a NOP on architectures without
CONFIG_MMU_GATHER_RCU_TABLE_FREE.
Here, the assumption is that the previous TLB flush would send an
IPI to all relevant CPUs. Careful: some architectures like x86 only
send IPIs to all relevant CPUs when tlb->freed_tables is set.
The relevant architectures should be selecting
MMU_GATHER_RCU_TABLE_FREE, but x86 might not do that in stable
kernels and it might have been problematic before this patch.
Also, the arch flushing behavior (independent of IPIs) is different
when tlb->freed_tables is set. Do we have to enlighten them to also
take care of tlb->unshared_tables? So far we didn't care, so
hopefully we are fine. Of course, we could be setting
tlb->freed_tables as well, but that might then unnecessarily flush
too much, because the semantics of tlb->freed_tables are a bit
fuzzy.
This patch changes nothing in this regard.
(2) tlb_remove_table_sync_one() is not a NOP on architectures with
CONFIG_MMU_GATHER_RCU_TABLE_FREE that actually don't need a sync.
Take x86 as an example: in the common case (!pv, !X86_FEATURE_INVLPGB)
we still issue IPIs during TLB flushes and don't actually need the
second tlb_remove_table_sync_one().
This optimized can be implemented on top of this, by checking e.g., in
tlb_remove_table_sync_one() whether we really need IPIs. But as
described in (1), it really must honor tlb->freed_tables then to
send IPIs to all relevant CPUs.
Notes on TLB flushing changes:
(1) Flushing for non-shared PMD tables
We're converting from flush_hugetlb_tlb_range() to
tlb_remove_huge_tlb_entry(). Given that we properly initialize the
MMU gather in tlb_gather_mmu_vma() to be hugetlb aware, similar to
__unmap_hugepage_range(), that should be fine.
(2) Flushing for shared PMD tables
We're converting from various things (flush_hugetlb_tlb_range(),
tlb_flush_pmd_range(), flush_tlb_range()) to tlb_flush_pmd_range().
tlb_flush_pmd_range() achieves the same that
tlb_remove_huge_tlb_entry() would achieve in these scenarios.
Note that tlb_remove_huge_tlb_entry() also calls
__tlb_remove_tlb_entry(), however that is only implemented on
powerpc, which does not support PMD table sharing.
Similar to (1), tlb_gather_mmu_vma() should make sure that TLB
flushing keeps on working as expected.
Further, note that the ptdesc_pmd_pts_dec() in huge_pmd_share() is not a
concern, as we are holding the i_mmap_lock the whole time, preventing
concurrent unsharing. That ptdesc_pmd_pts_dec() usage will be removed
separately as a cleanup later.
There are plenty more cleanups to be had, but they have to wait until
this is fixed.
[david@kernel.org: fix kerneldoc]
Link: https://lkml.kernel.org/r/f223dd74-331c-412d-93fc-69e360a5006c@kernel.org
Link: https://lkml.kernel.org/r/20251223214037.580860-5-david@kernel.org
Fixes: 1013af4f585f ("mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race")
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reported-by: Uschakow, Stanislav" <suschako@amazon.de>
Closes: https://lore.kernel.org/all/4d3878531c76479d9f8ca9789dc6485d@amazon.de/
Tested-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liu Shixin <liushixin2@huawei.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Rik van Riel <riel@surriel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "mm/hugetlb: fixes for PMD table sharing (incl. using
mmu_gather)", v3.
One functional fix, one performance regression fix, and two related
comment fixes.
I cleaned up my prototype I recently shared [1] for the performance fix,
deferring most of the cleanups I had in the prototype to a later point.
While doing that I identified the other things.
The goal of this patch set is to be backported to stable trees "fairly"
easily. At least patch #1 and #4.
Patch #1 fixes hugetlb_pmd_shared() not detecting any sharing
Patch #2 + #3 are simple comment fixes that patch #4 interacts with.
Patch #4 is a fix for the reported performance regression due to excessive
IPI broadcasts during fork()+exit().
The last patch is all about TLB flushes, IPIs and mmu_gather.
Read: complicated
There are plenty of cleanups in the future to be had + one reasonable
optimization on x86. But that's all out of scope for this series.
Runtime tested, with a focus on fixing the performance regression using
the original reproducer [2] on x86.
This patch (of 4):
We switched from (wrongly) using the page count to an independent shared
count. Now, shared page tables have a refcount of 1 (excluding
speculative references) and instead use ptdesc->pt_share_count to identify
sharing.
We didn't convert hugetlb_pmd_shared(), so right now, we would never
detect a shared PMD table as such, because sharing/unsharing no longer
touches the refcount of a PMD table.
Page migration, like mbind() or migrate_pages() would allow for migrating
folios mapped into such shared PMD tables, even though the folios are not
exclusive. In smaps we would account them as "private" although they are
"shared", and we would be wrongly setting the PM_MMAP_EXCLUSIVE in the
pagemap interface.
Fix it by properly using ptdesc_pmd_is_shared() in hugetlb_pmd_shared().
Link: https://lkml.kernel.org/r/20251223214037.580860-1-david@kernel.org
Link: https://lkml.kernel.org/r/20251223214037.580860-2-david@kernel.org
Link: https://lore.kernel.org/all/8cab934d-4a56-44aa-b641-bfd7e23bd673@kernel.org/ [1]
Link: https://lore.kernel.org/all/8cab934d-4a56-44aa-b641-bfd7e23bd673@kernel.org/ [2]
Fixes: 59d9094df3d7 ("mm: hugetlb: independent PMD page table shared count")
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Tested-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Oscar Salvador <osalvador@suse.de>
Cc: Liu Shixin <liushixin2@huawei.com>
Cc: Uschakow, Stanislav" <suschako@amazon.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Above the while() loop in wait_sb_inodes(), we document that we must wait
for all pages under writeback for data integrity. Consequently, if a
mapping, like fuse, traditionally does not have data integrity semantics,
there is no need to wait at all; we can simply skip these inodes.
This restores fuse back to prior behavior where syncs are no-ops. This
fixes a user regression where if a system is running a faulty fuse server
that does not reply to issued write requests, this causes wait_sb_inodes()
to wait forever.
Link: https://lkml.kernel.org/r/20260105211737.4105620-2-joannelkoong@gmail.com
Fixes: 0c58a97f919c ("fuse: remove tmp folio for writebacks and internal rb tree")
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Reported-by: Athul Krishna <athul.krishna.kr@protonmail.com>
Reported-by: J. Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Bernd Schubert <bschubert@ddn.com>
Tested-by: J. Neuschäfer <j.neuschaefer@gmx.net>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Bernd Schubert <bschubert@ddn.com>
Cc: Bonaccorso Salvatore <carnil@debian.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Both init_mm and efi_mm static definitions need to make room for the 2
mm_cid cpumasks.
This fixes possible out-of-bounds accesses to init_mm and efi_mm.
Add a space between # and define for the mm_alloc_cid() definition to make
it consistent with the coding style used in the rest of this header file.
Link: https://lkml.kernel.org/r/20251224173358.647691-4-mathieu.desnoyers@efficios.com
Fixes: af7f588d8f73 ("sched: Introduce per-memory-map concurrency ID")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Thomas Gleixner <tglx@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Aboorva Devarajan <aboorvad@linux.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Liam R . Howlett" <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Martin Liu <liumartin@google.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: SeongJae Park <sj@kernel.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The cpu_bitmap flexible array now contains more than just the cpu_bitmap.
In preparation for changing the static mm_struct definitions to cover for
the additional space required, change the cpu_bitmap type from "unsigned
long" to "char", require an unsigned long alignment of the flexible array,
and rename the field from "cpu_bitmap" to "flexible_array".
Introduce the MM_STRUCT_FLEXIBLE_ARRAY_INIT macro to statically initialize
the flexible array. This covers the init_mm and efi_mm static
definitions.
This is a preparation step for fixing the missing mm_cid size for static
mm_struct definitions.
Link: https://lkml.kernel.org/r/20251224173358.647691-3-mathieu.desnoyers@efficios.com
Fixes: af7f588d8f73 ("sched: Introduce per-memory-map concurrency ID")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Thomas Gleixner <tglx@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Aboorva Devarajan <aboorvad@linux.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Christan König <christian.koenig@amd.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Liam R . Howlett" <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Martin Liu <liumartin@google.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: SeongJae Park <sj@kernel.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB fixes and new device ids for 6.19-rc6
Included in here are:
- new usb-serial device ids
- dwc3-apple driver fixes to get things working properly on that
hardware platform
- ohci/uhci platfrom driver module soft-deps with ehci to remove a
runtime warning that sometimes shows up on some platforms.
- quirk for broken devices that can not handle reading the BOS
descriptor from them without going crazy.
- usb-serial driver fixes
- xhci driver fixes
- usb gadget driver fixes
All of these except for the last xhci fix has been in linux-next for a
while. The xhci fix has been reported by others to solve the issue for
them, so should be ok"
* tag 'usb-6.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
xhci: sideband: don't dereference freed ring when removing sideband endpoint
usb: gadget: uvc: retry vb2_reqbufs() with vb_vmalloc_memops if use_sg fail
usb: gadget: uvc: return error from uvcg_queue_init()
usb: gadget: uvc: fix interval_duration calculation
usb: gadget: uvc: fix req_payload_size calculation
usb: dwc3: apple: Ignore USB role switches to the active role
usb: host: xhci-tegra: Use platform_get_irq_optional() for wake IRQs
USB: OHCI/UHCI: Add soft dependencies on ehci_platform
usb: dwc3: apple: Set USB2 PHY mode before dwc3 init
USB: serial: f81232: fix incomplete serial port generation
USB: serial: ftdi_sio: add support for PICAXE AXE027 cable
USB: serial: option: add Telit LE910 MBIM composition
usb: core: add USB_QUIRK_NO_BOS for devices that hang on BOS descriptor
dt-bindings: usb: qcom,dwc3: Correct MSM8994 interrupts
dt-bindings: usb: qcom,dwc3: Correct IPQ5018 interrupts
tcpm: allow looking for role_sw device in the main node
usb: dwc3: Check for USB4 IP_NAME
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Misc deadline scheduler fixes, mainly for a new category of bugs that
were discovered and fixed recently:
- Fix a race condition in the DL server
- Fix a DL server bug which can result in incorrectly going idle when
there's work available
- Fix DL server bug which triggers a WARN() due to broken
get_prio_dl() logic and subsequent misbehavior
- Fix double update_rq_clock() calls
- Fix setscheduler() assumption about static priorities
- Make sure balancing callbacks are always called
- Plus a handful of preparatory commits for the fixes"
* tag 'sched-urgent-2026-01-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/deadline: Use ENQUEUE_MOVE to allow priority change
sched: Deadline has dynamic priority
sched: Audit MOVE vs balance_callbacks
sched: Fold rq-pin swizzle into __balance_callbacks()
sched/deadline: Avoid double update_rq_clock()
sched/deadline: Ensure get_prio_dl() is up-to-date
sched/deadline: Fix server stopping with runnable tasks
sched: Provide idle_rq() helper
sched/deadline: Fix potential race in dl_add_task_root_domain()
sched/deadline: Remove unnecessary comment in dl_add_task_root_domain()
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git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI fix from Bjorn Helgaas:
- Add a pci_free_irq_vectors() stub to fix a build issue when
CONFIG_PCI is not set (Boqun Feng)
* tag 'pci-v6.19-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
PCI: Provide pci_free_irq_vectors() stub
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix an error path memory leak in the energy model management
code, fix a kerneldoc comment in it, and fix and revamp the energy
model YNL specification added recently along with the new energy model
management netlink interface (that received feedback after being
added):
- Fix a memory leak in em_create_pd() error path (Malaya Kumar Rout)
- Fix stale description of the cost field in struct em_perf_state to
reflect the current code (Yaxiong Tian)
- Fix and revamp the energy model YNL specification added recently
along with the energy model netlink interface (Changwoo Min)"
* tag 'pm-6.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM: EM: Add dump to get-perf-domains in the EM YNL spec
PM: EM: Change cpus' type from string to u64 array in the EM YNL spec
PM: EM: Rename em.yaml to dev-energymodel.yaml
PM: EM: Fix yamllint warnings in the EM YNL spec
PM: EM: Fix memory leak in em_create_pd() error path
PM: EM: Fix incorrect description of the cost field in struct em_perf_state
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Merge fixes related to the energy model management for 6.19-rc6:
- Fix a memory leak in em_create_pd() error path (Malaya Kumar Rout)
- Fix stale description of the cost field in struct em_perf_state to
reflect the current code (Yaxiong Tian)
- Fix and revamp the energy model YNL specification added recently
along with the energy model netlink interface (Changwoo Min)
* pm-em:
PM: EM: Add dump to get-perf-domains in the EM YNL spec
PM: EM: Change cpus' type from string to u64 array in the EM YNL spec
PM: EM: Rename em.yaml to dev-energymodel.yaml
PM: EM: Fix yamllint warnings in the EM YNL spec
PM: EM: Fix memory leak in em_create_pd() error path
PM: EM: Fix incorrect description of the cost field in struct em_perf_state
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Currently, the driver's device private data is allocated and initialized
from driver core code called from bus abstractions after the driver's
probe() callback returned the corresponding initializer.
Similarly, the driver's device private data is dropped within the
remove() callback of bus abstractions after calling the remove()
callback of the corresponding driver.
However, commit 6f61a2637abe ("rust: device: introduce
Device::drvdata()") introduced an accessor for the driver's device
private data for a Device<Bound>, i.e. a device that is currently bound
to a driver.
Obviously, this is in conflict with dropping the driver's device private
data in remove(), since a device can not be considered to be fully
unbound after remove() has finished:
We also have to consider registrations guarded by devres - such as IRQ
or class device registrations - which are torn down after remove() in
devres_release_all().
Thus, it can happen that, for instance, a class device or IRQ callback
still calls Device::drvdata(), which then runs concurrently to remove()
(which sets dev->driver_data to NULL and drops the driver's device
private data), before devres_release_all() started to tear down the
corresponding registration. This is because devres guarded registrations
can, as expected, access the corresponding Device<Bound> that defines
their scope.
In C it simply is the driver's responsibility to ensure that its device
private data is freed after e.g. an IRQ registration is unregistered.
Typically, C drivers achieve this by allocating their device private data
with e.g. devm_kzalloc() before doing anything else, i.e. before e.g.
registering an IRQ with devm_request_threaded_irq(), relying on the
reverse order cleanup of devres.
Technically, we could do something similar in Rust. However, the
resulting code would be pretty messy:
In Rust we have to differentiate between allocated but uninitialized
memory and initialized memory in the type system. Thus, we would need to
somehow keep track of whether the driver's device private data object
has been initialized (i.e. probe() was successful and returned a valid
initializer for this memory) and conditionally call the destructor of
the corresponding object when it is freed.
This is because we'd need to allocate and register the memory of the
driver's device private data *before* it is initialized by the
initializer returned by the driver's probe() callback, because the
driver could already register devres guarded registrations within
probe() outside of the driver's device private data initializer.
Luckily there is a much simpler solution: Instead of dropping the
driver's device private data at the end of remove(), we just drop it
after the device has been fully unbound, i.e. after all devres callbacks
have been processed.
For this, we introduce a new post_unbind() callback private to the
driver-core, i.e. the callback is neither exposed to drivers, nor to bus
abstractions.
This way, the driver-core code can simply continue to conditionally
allocate the memory for the driver's device private data when the
driver's initializer is returned from probe() - no change needed - and
drop it when the driver-core code receives the post_unbind() callback.
Closes: https://lore.kernel.org/all/DEZMS6Y4A7XE.XE7EUBT5SJFJ@kernel.org/
Fixes: 6f61a2637abe ("rust: device: introduce Device::drvdata()")
Acked-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Igor Korotin <igor.korotin.linux@gmail.com>
Link: https://patch.msgid.link/20260107103511.570525-7-dakr@kernel.org
[ Remove #ifdef CONFIG_RUST, rename post_unbind() to post_unbind_rust().
- Danilo]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Pull NFS client fixes from Trond Myklebust:
- Fix another deadlock involving nfs_release_folio()
- localio:
- Stop I/O upon hitting a fatal error
- Deal with page offsets that are > PAGE_SIZE
- Fix size read races in truncate, fallocate and copy offload
- Several bugfixes for the NFSv4.x directory delegation client code
- pNFS:
- Fix a deadlock when returning delegations during open
- Fix memory leaks in various error paths
* tag 'nfs-for-6.19-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFS: Fix size read races in truncate, fallocate and copy offload
NFS: Don't immediately return directory delegations when disabled
NFS/localio: Deal with page bases that are > PAGE_SIZE
NFS/localio: Stop further I/O upon hitting an error
NFSv4.x: Directory delegations don't require any state recovery
NFSv4: Don't free slots prematurely if requesting a directory delegation
NFSv4: Fix nfs_clear_verifier_delegated() for delegated directories
NFS: Fix directory delegation verifier checks
pnfs/blocklayout: Fix memory leak in bl_parse_scsi()
pnfs/flexfiles: Fix memory leak in nfs4_ff_alloc_deviceid_node()
NFS: Fix a deadlock involving nfs_release_folio()
pNFS: Fix a deadlock when returning a delegation during open()
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
- kerneldoc fixes from Bagas Sanjaya
- DAMON fixes from SeongJae
- mremap VMA-related fixes from Lorenzo
- various singletons - please see the changelogs for details
* tag 'mm-hotfixes-stable-2026-01-15-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (30 commits)
drivers/dax: add some missing kerneldoc comment fields for struct dev_dax
mm: numa,memblock: include <asm/numa.h> for 'numa_nodes_parsed'
mailmap: add entry for Daniel Thompson
tools/testing/selftests: fix gup_longterm for unknown fs
mm/page_alloc: prevent pcp corruption with SMP=n
iommu/sva: include mmu_notifier.h header
mm: kmsan: fix poisoning of high-order non-compound pages
tools/testing/selftests: add forked (un)/faulted VMA merge tests
mm/vma: enforce VMA fork limit on unfaulted,faulted mremap merge too
tools/testing/selftests: add tests for !tgt, src mremap() merges
mm/vma: fix anon_vma UAF on mremap() faulted, unfaulted merge
mm/zswap: fix error pointer free in zswap_cpu_comp_prepare()
mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure
mm/damon/sysfs-scheme: cleanup quotas subdirs on scheme dir setup failure
mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure
mm/damon/sysfs: cleanup intervals subdirs on attrs dir setup failure
mm/damon/core: remove call_control in inactive contexts
powerpc/watchdog: add support for hardlockup_sys_info sysctl
mips: fix HIGHMEM initialization
mm/hugetlb: ignore hugepage kernel args if hugepages are unsupported
...
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Paolo Abeni:
"Including fixes from bluetooth, can and IPsec.
Current release - regressions:
- net: add net.core.qdisc_max_burst
- can: propagate CAN device capabilities via ml_priv
Previous releases - regressions:
- dst: fix races in rt6_uncached_list_del() and
rt_del_uncached_list()
- ipv6: fix use-after-free in inet6_addr_del().
- xfrm: fix inner mode lookup in tunnel mode GSO segmentation
- ip_tunnel: spread netdev_lockdep_set_classes()
- ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()
- bluetooth: hci_sync: enable PA sync lost event
- eth: virtio-net:
- fix the deadlock when disabling rx NAPI
- fix misalignment bug in struct virtnet_info
Previous releases - always broken:
- ipv4: ip_gre: make ipgre_header() robust
- can: fix SSP_SRC in cases when bit-rate is higher than 1 MBit.
- eth:
- mlx5e: profile change fix
- octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback
- macvlan: fix possible UAF in macvlan_forward_source()"
* tag 'net-6.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (37 commits)
virtio_net: Fix misalignment bug in struct virtnet_info
net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts
can: raw: instantly reject disabled CAN frames
can: propagate CAN device capabilities via ml_priv
Revert "can: raw: instantly reject unsupported CAN frames"
net/sched: sch_qfq: do not free existing class in qfq_change_class()
selftests: drv-net: fix RPS mask handling for high CPU numbers
selftests: drv-net: fix RPS mask handling in toeplitz test
ipv6: Fix use-after-free in inet6_addr_del().
dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list()
net: hv_netvsc: reject RSS hash key programming without RX indirection table
tools: ynl: render event op docs correctly
net: add net.core.qdisc_max_burst
net: airoha: Fix typo in airoha_ppe_setup_tc_block_cb definition
net: phy: motorcomm: fix duplex setting error for phy leds
net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback
net/mlx5e: Restore destroying state bit after profile cleanup
net/mlx5e: Pass netdev to mlx5e_destroy_netdev instead of priv
net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv
net/mlx5e: Fix crash on profile change rollback failure
...
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Commit 1a620a723853 ("can: raw: instantly reject unsupported CAN frames")
caused a sequence of dependency and linker fixes.
Instead of accessing CAN device internal data structures which caused the
dependency problems this patch introduces capability information into the
CAN specific ml_priv data which is accessible from both sides.
With this change the CAN network layer can check the required features and
the decoupling of the driver layer and network layer is restored.
Fixes: 1a620a723853 ("can: raw: instantly reject unsupported CAN frames")
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Vincent Mailhol <mailhol@kernel.org>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://patch.msgid.link/20260109144135.8495-3-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This reverts commit 1a620a723853a0f49703c317d52dc6b9602cbaa8
and its follow-up fixes for the introduced dependency issues.
commit 1a620a723853 ("can: raw: instantly reject unsupported CAN frames")
commit cb2dc6d2869a ("can: Kconfig: select CAN driver infrastructure by default")
commit 6abd4577bccc ("can: fix build dependency")
commit 5a5aff6338c0 ("can: fix build dependency")
The entire problem was caused by the requirement that a new network layer
feature needed to know about the protocol capabilities of the CAN devices.
Instead of accessing CAN device internal data structures which caused the
dependency problems a better approach has been developed which makes use of
CAN specific ml_priv data which is accessible from both sides.
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Vincent Mailhol <mailhol@kernel.org>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://patch.msgid.link/20260109144135.8495-2-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Commit a9af76a78760 ("watchdog: add sys_info sysctls to dump sys info on
system lockup") adds 'hardlock_sys_info' systcl knob for general kernel
watchdog to control what kinds of system debug info to be dumped on
hardlockup.
Add similar support in powerpc watchdog code to make the sysctl knob more
general, which also fixes a compiling warning in general watchdog code
reported by 0day bot.
Link: https://lkml.kernel.org/r/20251231080309.39642-1-feng.tang@linux.alibaba.com
Fixes: a9af76a78760 ("watchdog: add sys_info sysctls to dump sys info on system lockup")
Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512030920.NFKtekA7-lkp@intel.com/
Suggested-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Sphinx reports kernel-doc warning:
WARNING: ./include/linux/kfence.h:220 function parameter 'slab' not described in '__kfence_obj_info'
Fix it by describing @slab parameter.
Link: https://lkml.kernel.org/r/20251219014006.16328-6-bagasdotme@gmail.com
Fixes: 2dfe63e61cc3 ("mm, kfence: support kmem_dump_obj() for KFENCE objects")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Acked-by: Marco Elver <elver@google.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Acked-by: Harry Yoo <harry.yoo@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Sphinx reports kernel-doc warning:
WARNING: ./include/linux/textsearch.h:49 struct member 'list' not described in 'ts_ops'
Describe @list member to fix it.
Link: https://lkml.kernel.org/r/20251219014006.16328-4-bagasdotme@gmail.com
Fixes: 2de4ff7bd658 ("[LIB]: Textsearch infrastructure.")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "mm kernel-doc fixes".
Here are kernel-doc fixes for mm subsystem. I'm also including textsearch
fix since there's currently no maintainer for include/linux/textsearch.h
(get_maintainer.pl only shows LKML).
This patch (of 4):
Sphinx reports kernel-doc warning:
WARNING: ./include/linux/sched/mm.h:332 function parameter 'flags' not described in 'memalloc_flags_save'
Describe @flags to fix it.
Link: https://lkml.kernel.org/r/20251219014006.16328-2-bagasdotme@gmail.com
Link: https://lkml.kernel.org/r/20251219014006.16328-3-bagasdotme@gmail.com
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Fixes: 3f6d5e6a468d ("mm: introduce memalloc_flags_{save,restore}")
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Acked-by: Harry Yoo <harry.yoo@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-linus
Jonathan writes:
IIO: 1st set of fixes for the 6.19 cycle
The usual mixed bag of fixes for ancient problems plus some more
recent ones.
adi,ad7280a
- Check for errors from spi_setup().
adi,ad3552r
- Fix potential buffer overflow when setting to use the internal ramp.
adi,ax5695r
- Fill in the data for this device in the chip info table.
adi,ad7606
- Don't store a negative error in an unsigned int.
adi,ad9467
- Fix incorrect register mask value.
adi,adxl380
- Fix inverted condition for whether INT1 interrupt present in dt.
atmel,at91-sama5d2
- Cancel work on remove to avoid a potential use-after-free
invensense,icm45600
- Fix temperature scaling.
samsung,eynos_adc
- Use of_platform_depolulate() to correctly clear up such that child
devices are created correctly if the driver is rebound.
sensiron,scd4x
- Fix incorrect endianness reported to user-space.
st,accel
- Fix gain reported for the iis329dq.
st,lsm6dsx
- Hide event related interfaces on parts that don't support events.
ti,pac1934
- Ensure output of clamp() is used rather than unclamped value.
* tag 'iio-fixes-for-6.19a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio:
iio: dac: ad3552r-hs: fix out-of-bound write in ad3552r_hs_write_data_source
iio: accel: iis328dq: fix gain values
iio: core: add separate lockdep class for info_exist_lock
iio: chemical: scd4x: fix reported channel endianness
iio: imu: inv_icm45600: fix temperature offset reporting
iio: adc: exynos_adc: fix OF populate on driver rebind
iio: dac: ad5686: add AD5695R to ad5686_chip_info_tbl
iio: accel: adxl380: fix handling of unavailable "INT1" interrupt
iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection
iio: adc: pac1934: Fix clamped value in pac1934_reg_snapshot
iio: adc: ad9467: fix ad9434 vref mask
iio: adc: ad7606: Fix incorrect type for error return variable
iio: adc: ad7280a: handle spi_setup() errors in probe()
iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver
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It would be useful to be able to check for potential DMA pages beyond
just ZONE_DMA - generalise the existing has_managed_dma() function to
allow checking other zones too.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Tested-by: Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/bd002d2351074e57be1ca08f03f333debac658fb.1768230104.git.robin.murphy@arm.com
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A fix for the dl_server 'requires' idle_cpu() usage, which made me
note that it and available_idle_cpu() are extern function calls.
And while idle_cpu() is used outside of kernel/sched/,
available_idle_cpu() is not.
This makes it hard to make idle_cpu() an inline helper, so provide
idle_rq() and implement idle_cpu() and available_idle_cpu() using
that.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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Fix Typo in airoha_ppe_dev_setup_tc_block_cb routine definition when
CONFIG_NET_AIROHA is not enabled.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202601090517.Fj6v501r-lkp@intel.com/
Fixes: f45fc18b6de04 ("net: airoha: Add airoha_ppe_dev struct definition")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260109-airoha_ppe_dev_setup_tc_block_cb-typo-v1-1-282e8834a9f9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo:
- Fix -Wflex-array-member-not-at-end warnings in cgroup_root
* tag 'cgroup-for-6.19-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: Eliminate cgrp_ancestor_storage in cgroup_root
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473b9f331718 ("rust: pci: fix build failure when CONFIG_PCI_MSI is
disabled") fixed a build error by providing Rust helpers when
CONFIG_PCI_MSI is not set. However the Rust helpers rely on
pci_free_irq_vectors(), which is only available when CONFIG_PCI=y.
When CONFIG_PCI is not set, there is already a stub for
pci_alloc_irq_vectors(). Add a similar stub for pci_free_irq_vectors().
Fixes: 473b9f331718 ("rust: pci: fix build failure when CONFIG_PCI_MSI is disabled")
Reported-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Closes: https://lore.kernel.org/rust-for-linux/20251209014312.575940-1-fujita.tomonori@gmail.com/
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512 |
