linux.git/drivers/md/dm-writecache.c, branch v7.3-rc2 Linux kernel source tree Merge tag 'for-7.3/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm 2026-08-19T19:35:15+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-08-19T19:35:15+00:00 7fa7d4c6038bb4b394478ba1b31a6e8d89ed4f60 Pull device mapper updates from Mikulas Patocka: - minor cleanups found by Claude Opus 4.6 - small cleanups in dm core, dm-cache, dm-switch, dm-inlinecrypt, dm-vdo - improve validation of metadata in dm-pcache - fix resume-vs-remove ioctl race condition - fix race condition when issuing table load ioctls concurrently - fix dm-raid1 and dm-io, so that they work with unaligned bio vectors - dm-integrity: use keyed markers as discard fillers - improve metadata validation in dm-array - fix dm-stats crash on memory allocation failure - fix dm-dust, so that it works if it is not the first target in a table - dm-era: fix superblock refcount leak on snapshot failure * tag 'for-7.3/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (46 commits) dm-era: fix shadowed superblock leak on take-snap failure dm dust: make badblock messages target-relative dm-stats: fix a crash if allocation of per-cpu data fails dm array: reject an array block whose value size is not the caller's dm array: validate array block headers on read dm-integrity: replace forgeable discard filler with a keyed sector marker dm vdo indexer: embed geometry in parent structures dm vdo indexer: simplify sub-index parameter calculations dm-pcache: remove unused 'cache' parameter from cache_key_gc() docs: device-mapper: dm-inlinecrypt: fix 'bellow' spelling dm-pcache: remove unused miss_read_end_work_fn declaration dm-io: report non-retryable errors separatedly dm-io: clone the source bio instead of copying its biovec dm: fix race when loading and unloading a table dm: fix resume-vs-remove race dm-pcache: remove unused 'allocated' variable in cache_data_alloc() dm-pcache: replace tabs with spaces in comments to fix ASCII diagram alignment dm-pcache: fix use-after-free and invalid seg operations in kset_replay() dm-pcache: fix implicit u8 truncation of gc_percent in message handler dm raid1: reserve space for NUL-terminator in build_constructor_string() ... 
Pull device mapper updates from Mikulas Patocka:

 - minor cleanups found by Claude Opus 4.6

 - small cleanups in dm core, dm-cache, dm-switch, dm-inlinecrypt,
   dm-vdo

 - improve validation of metadata in dm-pcache

 - fix resume-vs-remove ioctl race condition

 - fix race condition when issuing table load ioctls concurrently

 - fix dm-raid1 and dm-io, so that they work with unaligned bio vectors

 - dm-integrity: use keyed markers as discard fillers

 - improve metadata validation in dm-array

 - fix dm-stats crash on memory allocation failure

 - fix dm-dust, so that it works if it is not the first target in a
   table

 - dm-era: fix superblock refcount leak on snapshot failure

* tag 'for-7.3/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (46 commits)
  dm-era: fix shadowed superblock leak on take-snap failure
  dm dust: make badblock messages target-relative
  dm-stats: fix a crash if allocation of per-cpu data fails
  dm array: reject an array block whose value size is not the caller's
  dm array: validate array block headers on read
  dm-integrity: replace forgeable discard filler with a keyed sector marker
  dm vdo indexer: embed geometry in parent structures
  dm vdo indexer: simplify sub-index parameter calculations
  dm-pcache: remove unused 'cache' parameter from cache_key_gc()
  docs: device-mapper: dm-inlinecrypt: fix 'bellow' spelling
  dm-pcache: remove unused miss_read_end_work_fn declaration
  dm-io: report non-retryable errors separatedly
  dm-io: clone the source bio instead of copying its biovec
  dm: fix race when loading and unloading a table
  dm: fix resume-vs-remove race
  dm-pcache: remove unused 'allocated' variable in cache_data_alloc()
  dm-pcache: replace tabs with spaces in comments to fix ASCII diagram alignment
  dm-pcache: fix use-after-free and invalid seg operations in kset_replay()
  dm-pcache: fix implicit u8 truncation of gc_percent in message handler
  dm raid1: reserve space for NUL-terminator in build_constructor_string()
  ...
dm-io: report non-retryable errors separatedly 2026-07-27T21:09:28+00:00 Mikulas Patocka mpatocka@redhat.com 2026-07-27T21:09:28+00:00 47a5e62f39875f371bded6e34ffb9cf15ccd813d The error codes BLK_STS_NOTSUPP and BLK_STS_INVAL should not cause leg failure on dm-raid1. This patch changes the interface to dm-io, so that it reports two error bitmaps - error_bits and unsup_bits. The unsup_bit bitmap tracks BLK_STS_NOTSUPP or BLK_STS_INVAL errors, the error_bits bitmap tracks all the other errors. dm-raid1 is changed so that it won't fail a leg if it receives an error in the unsup_bits bitmap. This patch (with 62dc37a819a5) fixes misbehavior if the user uses unaligned bio vectors on dm-raid1. Fixes: 7eac33186957 ("iomap: simplify direct io validity check") Fixes: 5ff3f74e145a ("block: simplify direct io validity check") Cc: stable@vger.kernel.org Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> 
The error codes BLK_STS_NOTSUPP and BLK_STS_INVAL should not cause leg
failure on dm-raid1. This patch changes the interface to dm-io, so that
it reports two error bitmaps - error_bits and unsup_bits. The unsup_bit
bitmap tracks BLK_STS_NOTSUPP or BLK_STS_INVAL errors, the error_bits
bitmap tracks all the other errors.

dm-raid1 is changed so that it won't fail a leg if it receives an error
in the unsup_bits bitmap.

This patch (with 62dc37a819a5) fixes misbehavior if the user uses
unaligned bio vectors on dm-raid1.

Fixes: 7eac33186957 ("iomap: simplify direct io validity check")
Fixes: 5ff3f74e145a ("block: simplify direct io validity check")
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
x86/cpu: Hide and rename static_cpu_has() 2026-07-07T04:34:26+00:00 Borislav Petkov (AMD) bp@alien8.de 2026-06-20T01:50:41+00:00 3eaa50e1e255ec261c757b9eea811ef3bac10d1e cpu_feature_enabled() is the one to use to test feature flags so hide the static thing which doesn't pay attention to disabled mask bits anyway. Use the following command to do the replacement: $ git grep --files-with-matches -w static_cpu_has -- ':(exclude)*cpufeature.h' \ | xargs sed -i 's/static_cpu_has(/cpu_feature_enabled\(/g' There should be no functional changes resulting from this. Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Nikolay Borisov <nik.borisov@suse.com> Link: https://patch.msgid.link/20260620015041.336288-1-bp@kernel.org 
cpu_feature_enabled() is the one to use to test feature flags so hide
the static thing which doesn't pay attention to disabled mask bits
anyway.

Use the following command to do the replacement:

  $ git grep --files-with-matches -w static_cpu_has -- ':(exclude)*cpufeature.h' \
  | xargs sed -i 's/static_cpu_has(/cpu_feature_enabled\(/g'

There should be no functional changes resulting from this.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://patch.msgid.link/20260620015041.336288-1-bp@kernel.org
dm: provide helper to set stacked limits 2026-03-27T21:19:17+00:00 Keith Busch kbusch@kernel.org 2026-03-25T19:36:08+00:00 33eded29319d41fcba5d0257b126a48b449aad47 There are multiple device mappers that set up their stacking limits exactly the same for the logical, physical and minimum IO queue limits. Provide a helper for it. Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> 
There are multiple device mappers that set up their stacking limits
exactly the same for the logical, physical and minimum IO queue limits.
Provide a helper for it.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-22T01:09:51+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-22T00:37:42+00:00 bf4afc53b77aeaa48b5409da5c8da6bb4eff7f43 This was done entirely with mindless brute force, using git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' | xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/' to convert the new alloc_obj() users that had a simple GFP_KERNEL argument to just drop that argument. Note that due to the extreme simplicity of the scripting, any slightly more complex cases spread over multiple lines would not be triggered: they definitely exist, but this covers the vast bulk of the cases, and the resulting diff is also then easier to check automatically. For the same reason the 'flex' versions will be done as a separate conversion. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21T09:02:28+00:00 Kees Cook kees@kernel.org 2026-02-21T07:49:23+00:00 69050f8d6d075dc01af7a5f2f550a8067510366f This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook <kees@kernel.org> 
This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook <kees@kernel.org>
dm: add WQ_PERCPU to alloc_workqueue users 2026-01-14T12:16:00+00:00 Marco Crivellari marco.crivellari@suse.com 2026-01-13T11:03:02+00:00 d4880868670198df321627a949e7b7f2d76cf54e This continues the effort to refactor workqueue APIs, which began with the introduction of new workqueues and a new alloc_workqueue flag in: commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq") commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag") The refactoring is going to alter the default behavior of alloc_workqueue() to be unbound by default. With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND), any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND must now use WQ_PERCPU. For more details see the Link tag below. In order to keep alloc_workqueue() behavior identical, explicitly request WQ_PERCPU. Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/ Suggested-by: Tejun Heo <tj@kernel.org> Signed-off-by: Marco Crivellari <marco.crivellari@suse.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> 
This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue flag in:

   commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

The refactoring is going to alter the default behavior of
alloc_workqueue() to be unbound by default.

With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU. For more details see the Link tag below.

In order to keep alloc_workqueue() behavior identical, explicitly request
WQ_PERCPU.

Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
mm: remove callers of pfn_t functionality 2025-07-10T05:42:19+00:00 Alistair Popple apopple@nvidia.com 2025-06-19T08:58:05+00:00 21aa65bf82a78c1e70447a45a85e533689b7f1a7 All PFN_* pfn_t flags have been removed. Therefore there is no longer a need for the pfn_t type and all uses can be replaced with normal pfns. Link: https://lkml.kernel.org/r/bbedfa576c9822f8032494efbe43544628698b1f.1750323463.git-series.apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Balbir Singh <balbirs@nvidia.com> Cc: Björn Töpel <bjorn@kernel.org> Cc: Björn Töpel <bjorn@rivosinc.com> Cc: Chunyan Zhang <zhang.lyra@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Deepak Gupta <debug@rivosinc.com> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Inki Dae <m.szyprowski@samsung.com> Cc: John Groves <john@groves.net> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
All PFN_* pfn_t flags have been removed.  Therefore there is no longer a
need for the pfn_t type and all uses can be replaced with normal pfns.

Link: https://lkml.kernel.org/r/bbedfa576c9822f8032494efbe43544628698b1f.1750323463.git-series.apopple@nvidia.com
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Balbir Singh <balbirs@nvidia.com>
Cc: Björn Töpel <bjorn@kernel.org>
Cc: Björn Töpel <bjorn@rivosinc.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Deepak Gupta <debug@rivosinc.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Inki Dae <m.szyprowski@samsung.com>
Cc: John Groves <john@groves.net>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08T07:07:37+00:00 Ingo Molnar mingo@kernel.org 2025-05-09T05:51:14+00:00 41cb08555c4164996d67c78b3bf1c658075b75f1 Move this API to the canonical timer_*() namespace. [ tglx: Redone against pre rc1 ] Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com 
Move this API to the canonical timer_*() namespace.

[ tglx: Redone against pre rc1 ]

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com
treewide: Switch/rename to timer_delete[_sync]() 2025-04-05T08:30:12+00:00 Thomas Gleixner tglx@linutronix.de 2025-04-05T08:17:26+00:00 8fa7292fee5c5240402371ea89ab285ec856c916 timer_delete[_sync]() replaces del_timer[_sync](). Convert the whole tree over and remove the historical wrapper inlines. Conversion was done with coccinelle plus manual fixups where necessary. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> 
timer_delete[_sync]() replaces del_timer[_sync](). Convert the whole tree
over and remove the historical wrapper inlines.

Conversion was done with coccinelle plus manual fixups where necessary.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>