linux-toradex.git/drivers/video/fbdev/core, branch master Linux kernel for Apalis and Colibri modules Merge tag 'fbdev-for-7.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev 2026-10-30T16:27:35+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-10-30T16:27:35+00:00 67f1f9b38c15b54d257a1efc544873b53905737f Pull more fbdev updates from Helge Deller: - atmel_lcdfb: avoid issues due to empty modelist in probe - simplify the console-blanking interface * tag 'fbdev-for-7.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: fbdev: atmel_lcdfb: fix list_first_entry() on possibly empty modelist in probe vt: Remove old-style con_blank vgacon: Implement struct consw.con_unblank sticon: Implement struct consw.con_unblank newport_con: Implement struct consw.con_unblank fbcon: Implement struct consw.con_unblank dummycon: Implement struct consw.con_unblank vt: Add con_unblank callback to struct consw 
Pull more fbdev updates from Helge Deller:

 - atmel_lcdfb: avoid issues due to empty modelist in probe

 - simplify the console-blanking interface

* tag 'fbdev-for-7.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbdev: atmel_lcdfb: fix list_first_entry() on possibly empty modelist in probe
  vt: Remove old-style con_blank
  vgacon: Implement struct consw.con_unblank
  sticon: Implement struct consw.con_unblank
  newport_con: Implement struct consw.con_unblank
  fbcon: Implement struct consw.con_unblank
  dummycon: Implement struct consw.con_unblank
  vt: Add con_unblank callback to struct consw
Merge tag 'mm-stable-2026-10-25-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 2026-10-27T22:23:17+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-10-27T22:23:17+00:00 8a36f53fd5ec3eff01f1b637d42cbdc3821d0493 Pull more MM updates from Andrew Morton: - "mm: make VMA flag semantics explicit, eliminate VM_SPECIAL" (Lorenzo Stoakes): Replace VM_SPECIAL with helpers describing mapping ownership and behavior. Enforce the mmap flag rules and convert affected drivers, removing ambiguous tests shared by driver mappings and ordinary memory. - "support kselftest on nommu platform" (Hajime Tazaki): Add opt-in mmap and mremap tests for NOMMU systems. Teach the runner to avoid its fork-dependent timeout command and document the build and runtime requirements. - "mm/collapse: separate a collapse from its callers" (Kiryl Shutsemau): Separate huge-page collapse from caller policy. Replace khugepaged identity checks with explicit permissions, and separate scanning from collapse with the mmap_lock drop in one place. - "mm: implement and use vma_has_anon_rmap(), silence KCSAN" (Lorenzo Stoakes): Provide a common helper for testing whether a VMA has anonymous reverse mappings. Document the locking rules, annotate intentional concurrent reads for KCSAN, and convert the core MM callers. - "mm/sparse: remove SECTION_MARKED_PRESENT and further cleanups" (David Hildenbrand): Remove SECTION_MARKED_PRESENT in favor of the early-section flag. Simplify sparse memory initialization, section metadata handling and related PFN validity checks. - "sh: remove NUMA and SPARSEMEM support" (Mike Rapoport): Remove SuperH NUMA and SPARSEMEM support. The extra memory banks have been unusable since the NO_BOOTMEM conversion, leaving only the code and data overhead. - "mm: Unify device DAX and HugeTLB vmemmap population paths" (Muchun Song): Unify the generic device DAX and HugeTLB vmemmap population paths and shared tail-page handling. Remove the duplicate DAX machinery while retaining the powerpc radix implementation. - "kselftest: mm: fix some failure of split_huge_page_test" (Yeoreum Yun): Fix huge-page split tests racing with khugepaged recollapse. Use pagemap and page flags instead of VMA-boundary assumptions which fail when glibc has already enabled THP. - "memcg: move memcgid refcount to objcg to unpin dying memcgs" (Bingfang Guo): Let dying memcgs be freed while swapped-out shmem still holds their IDs. Move ID references to reparentable objcgs, with the necessary swap accounting and RCU lifetime changes. - "mm/truncate: fix data loss when truncating straddling large folios" (Zhang Yi): Preserve out-of-range data when truncating straddling large folios. Fix a lookup race and split-failure handling, and handle minimum folio orders for the forthcoming ext4 iomap buffered I/O path. - "mm/damon: introduce damos quota goal target metric complement flag" (SJ Park): Let DAMOS quota goals use a metric's complement, so utilization can also express free-memory goals without adding separate metrics. Add the sysfs interface, documentation and tests. - "arm64/mm: Standardize printing for pgtable entries" (Anshuman Khandual): Use the generic formatter for arm64 page-table entries, ready for future wider entries. Move the safe-PTE-update check out of the header to avoid an include cycle. - "mm: kmsan: fix iounmap metadata teardown" (Dima Koziuk): Fix KMSAN metadata leaks on iounmap and failed ioremap allocations. Free backing pages before removing their mappings, and share the teardown with partial-allocation cleanup. - "mm/damon/core: preserve quota state when constructing schemes" (Karl Mehltretter): Preserve running DAMOS quota state while validating parameter updates. Even rejected updates could reset accounting and exceed the quota window; add tests for both accepted and rejected updates. - "mm/vmalloc: fix vmalloc_dump_obj VA lookup" (Ye Liu): Fix vmalloc_dump_obj() lookups for last-page addresses and allocations spanning vmap zones. These allocations were being missed in diagnostic output. - "mm: various (urgent?) fixes" (David Hildenbrand): Fix mmap charge leaks and hugetlb use-after-free, wrong-address unmapping, stuck locks and endless faults. Also preserve reservations on failed mremap and handle stale userfaultfd bits. - "maple_tree: fix maple_range_64 crashes in RCU mode" (Dimitris Charisis): Fix pointer and metadata confusion during RCU destruction of maple_range_64 nodes, avoiding double frees and invalid accesses. Add a regression test; no in-tree user currently uses this combination. - "mm: fix hugetlb NR_HUGETLB accounting on folio migration" (Hongfu Li): Fix hugetlb migration and preallocation accounting so /proc/vmstat retains the correct count and memory.numa_stat follows the folio to its new node. - "mm/damon: fix a minor bug, clean code, and add a test" (SJ Park): Fix 32-bit DAMON age overflow which made old regions look young. Share hugetlb folio acquisition code and add a regression test for the previously fixed last-region skipping bug. - "mm/damon/core: cleanup code, reduce stack usage, and add kunit" (SJ Park): Reduce kdamond stack usage and remove unused enums. Add deterministic PSI quota-goal tests which do not depend on the machine's current memory pressure. - "mm/damon: fix the temporal goal tuner's size quota conversion" (Donggeun Yoo): Bound the temporal tuner's quota conversion to prevent overflow and zero effective quotas, which could stop schemes making progress. Add boundary tests. - "Don't use GFP_DMA when calling dma_alloc_coherent" (Baoquan He): Remove redundant GFP_DMA flags from coherent DMA allocation calls. The DMA API already selects the zone from device limits and ignores the caller's flag. - "kselftest: mm: fix intermittent failure khugepaged test" (Yeoreum Yun): Propagate child-process failures in the khugepaged tests and prevent background collapse from racing their checks. This removes false passes and intermittent failures. - "MAINTAINERS: cover all hugetlb headers under HUGETLB SUBSYSTEM" (Enze Li): Cover all hugetlb headers in MAINTAINERS so get_maintainer.pl finds the right maintainers. Also label the closing hugetlb_cgroup.h include guard. Summary of the 65 singletons in this merge: The singletons include a few worthwhile performance fixes. Avoiding unnecessary reverse-map tree updates gave a reported 15.9% improvement in UnixBench's execl test on a 192-core x86 system. A reclaim retry fix stops defrag_mode from spinning under memory.low protection; a reported file-creation stress test ran 5.7 times faster, with far less memory pressure. Narrower hugetlb invalidations also spare KVM guests needless refaults: the reported Redis-in-VM P99 QPS penalty while punching holes fell from 7.09% to 1.45%. Several fixes prevent lost data or corrupted memory. Lazyfree huge-page races with mremap()/munmap() could lose data or access freed memory, and MADV_COLD could lose a concurrent write's dirty bit. Another fix prevents stale migration entries from outliving large folios. On filesystems with blocks smaller than a page, extending a file by 4 GiB or more could expose bytes written past the old EOF through mmap instead of zeroes. That is fixed, along with use-after-free races in PAGEMAP_SCAN during process exit and in memory-cgroup accounting on PREEMPT_RT kernels. Other fixes stop UFFDIO_MOVE spinning forever on pinned large folios, which could wedge other memory operations, and stop mremap() leaking commit charges until allocations fail under strict overcommit. A further fix keeps userfaultfd tracking intact on neighboring mappings. NUMA binding no longer prevents long-term pins when the chosen node has only movable memory, fixing QEMU/VFIO startup and io_uring buffer registration failures. MGLRU also gets a fix for early-boot crashes with memory cgroups disabled at boot, notably in small crash kernels. * tag 'mm-stable-2026-10-25-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (213 commits) mm: multi-gen LRU: fix NULL lruvec->pgdat deref with memcg disabled on cmdline mm/page_counter: use WRITE_ONCE() for emin/elow when parent is the root mm/memcontrol: publish null pointer before dropping css reference test_maple_tree: test maple_range_64 node in RCU mode maple_tree: fix maple_range_64 crashes in RCU mode mm/vma: avoid broken uffd merge on mremap tools/testing/shared: catch a failed posix_memalign() mm/damon/core: remove unreachable damos charge_{target,addr}_from mm/shrinker: allocate shrinker_info_unit from a dedicated kmem_cache riscv: mm: exclude invalid THP PMDs from page table check mm/damon/core: filter out damos address filter-split failed region fs/proc/task_mmu: pin mm_users in do_pagemap_scan() mm/mempolicy: apply bind policies against the scoped allocation zone mm/vmscan: reclaim every zone in per-node proactive reclaim mm/mremap: correctly uncharge accountable VMAs in error path mm/mremap: populate calculated fields in vrm state correctly MAINTAINERS: add an entry for MEMORY MANAGEMENT - MEMORY MAP mm: bdi: reset min_ratio after the sysfs attributes are gone mm/page_vma_mapped: continue past nonmatching huge PMDs selftests/mm: skip hugetlb cgroup v2 tests without the needed controllers ... 
Pull more MM updates from Andrew Morton:

 - "mm: make VMA flag semantics explicit, eliminate VM_SPECIAL" (Lorenzo
   Stoakes):

   Replace VM_SPECIAL with helpers describing mapping ownership and
   behavior. Enforce the mmap flag rules and convert affected drivers,
   removing ambiguous tests shared by driver mappings and ordinary
   memory.

 - "support kselftest on nommu platform" (Hajime Tazaki):

   Add opt-in mmap and mremap tests for NOMMU systems. Teach the runner
   to avoid its fork-dependent timeout command and document the build
   and runtime requirements.

 - "mm/collapse: separate a collapse from its callers" (Kiryl
   Shutsemau):

   Separate huge-page collapse from caller policy. Replace khugepaged
   identity checks with explicit permissions, and separate scanning from
   collapse with the mmap_lock drop in one place.

 - "mm: implement and use vma_has_anon_rmap(), silence KCSAN" (Lorenzo
   Stoakes):

   Provide a common helper for testing whether a VMA has anonymous
   reverse mappings. Document the locking rules, annotate intentional
   concurrent reads for KCSAN, and convert the core MM callers.

 - "mm/sparse: remove SECTION_MARKED_PRESENT and further cleanups"
   (David Hildenbrand):

   Remove SECTION_MARKED_PRESENT in favor of the early-section flag.
   Simplify sparse memory initialization, section metadata handling and
   related PFN validity checks.

 - "sh: remove NUMA and SPARSEMEM support" (Mike Rapoport):

   Remove SuperH NUMA and SPARSEMEM support. The extra memory banks have
   been unusable since the NO_BOOTMEM conversion, leaving only the code
   and data overhead.

 - "mm: Unify device DAX and HugeTLB vmemmap population paths" (Muchun
   Song):

   Unify the generic device DAX and HugeTLB vmemmap population paths and
   shared tail-page handling. Remove the duplicate DAX machinery while
   retaining the powerpc radix implementation.

 - "kselftest: mm: fix some failure of split_huge_page_test" (Yeoreum
   Yun):

   Fix huge-page split tests racing with khugepaged recollapse. Use
   pagemap and page flags instead of VMA-boundary assumptions which fail
   when glibc has already enabled THP.

 - "memcg: move memcgid refcount to objcg to unpin dying memcgs"
   (Bingfang Guo):

   Let dying memcgs be freed while swapped-out shmem still holds their
   IDs. Move ID references to reparentable objcgs, with the necessary
   swap accounting and RCU lifetime changes.

 - "mm/truncate: fix data loss when truncating straddling large folios"
   (Zhang Yi):

   Preserve out-of-range data when truncating straddling large folios.
   Fix a lookup race and split-failure handling, and handle minimum
   folio orders for the forthcoming ext4 iomap buffered I/O path.

 - "mm/damon: introduce damos quota goal target metric complement flag"
   (SJ Park):

   Let DAMOS quota goals use a metric's complement, so utilization can
   also express free-memory goals without adding separate metrics. Add
   the sysfs interface, documentation and tests.

 - "arm64/mm: Standardize printing for pgtable entries" (Anshuman
   Khandual):

   Use the generic formatter for arm64 page-table entries, ready for
   future wider entries. Move the safe-PTE-update check out of the
   header to avoid an include cycle.

 - "mm: kmsan: fix iounmap metadata teardown" (Dima Koziuk):

   Fix KMSAN metadata leaks on iounmap and failed ioremap allocations.
   Free backing pages before removing their mappings, and share the
   teardown with partial-allocation cleanup.

 - "mm/damon/core: preserve quota state when constructing schemes" (Karl
   Mehltretter):

   Preserve running DAMOS quota state while validating parameter
   updates. Even rejected updates could reset accounting and exceed the
   quota window; add tests for both accepted and rejected updates.

 - "mm/vmalloc: fix vmalloc_dump_obj VA lookup" (Ye Liu):

   Fix vmalloc_dump_obj() lookups for last-page addresses and
   allocations spanning vmap zones. These allocations were being missed
   in diagnostic output.

 - "mm: various (urgent?) fixes" (David Hildenbrand):

   Fix mmap charge leaks and hugetlb use-after-free, wrong-address
   unmapping, stuck locks and endless faults. Also preserve reservations
   on failed mremap and handle stale userfaultfd bits.

 - "maple_tree: fix maple_range_64 crashes in RCU mode" (Dimitris
   Charisis):

   Fix pointer and metadata confusion during RCU destruction of
   maple_range_64 nodes, avoiding double frees and invalid accesses. Add
   a regression test; no in-tree user currently uses this combination.

 - "mm: fix hugetlb NR_HUGETLB accounting on folio migration" (Hongfu
   Li):

   Fix hugetlb migration and preallocation accounting so /proc/vmstat
   retains the correct count and memory.numa_stat follows the folio to
   its new node.

 - "mm/damon: fix a minor bug, clean code, and add a test" (SJ Park):

   Fix 32-bit DAMON age overflow which made old regions look young.
   Share hugetlb folio acquisition code and add a regression test for
   the previously fixed last-region skipping bug.

 - "mm/damon/core: cleanup code, reduce stack usage, and add kunit" (SJ
   Park):

   Reduce kdamond stack usage and remove unused enums. Add deterministic
   PSI quota-goal tests which do not depend on the machine's current
   memory pressure.

 - "mm/damon: fix the temporal goal tuner's size quota conversion"
   (Donggeun Yoo):

   Bound the temporal tuner's quota conversion to prevent overflow and
   zero effective quotas, which could stop schemes making progress. Add
   boundary tests.

 - "Don't use GFP_DMA when calling dma_alloc_coherent" (Baoquan He):

   Remove redundant GFP_DMA flags from coherent DMA allocation calls.
   The DMA API already selects the zone from device limits and ignores
   the caller's flag.

 - "kselftest: mm: fix intermittent failure khugepaged test" (Yeoreum
   Yun):

   Propagate child-process failures in the khugepaged tests and prevent
   background collapse from racing their checks. This removes false
   passes and intermittent failures.

 - "MAINTAINERS: cover all hugetlb headers under HUGETLB SUBSYSTEM"
   (Enze Li):

   Cover all hugetlb headers in MAINTAINERS so get_maintainer.pl finds
   the right maintainers. Also label the closing hugetlb_cgroup.h
   include guard.

Summary of the 65 singletons in this merge:

  The singletons include a few worthwhile performance fixes. Avoiding
  unnecessary reverse-map tree updates gave a reported 15.9% improvement
  in UnixBench's execl test on a 192-core x86 system. A reclaim retry
  fix stops defrag_mode from spinning under memory.low protection; a
  reported file-creation stress test ran 5.7 times faster, with far less
  memory pressure. Narrower hugetlb invalidations also spare KVM guests
  needless refaults: the reported Redis-in-VM P99 QPS penalty while
  punching holes fell from 7.09% to 1.45%.

  Several fixes prevent lost data or corrupted memory. Lazyfree
  huge-page races with mremap()/munmap() could lose data or access freed
  memory, and MADV_COLD could lose a concurrent write's dirty bit.
  Another fix prevents stale migration entries from outliving large
  folios. On filesystems with blocks smaller than a page, extending a
  file by 4 GiB or more could expose bytes written past the old EOF
  through mmap instead of zeroes. That is fixed, along with
  use-after-free races in PAGEMAP_SCAN during process exit and in
  memory-cgroup accounting on PREEMPT_RT kernels.

  Other fixes stop UFFDIO_MOVE spinning forever on pinned large folios,
  which could wedge other memory operations, and stop mremap() leaking
  commit charges until allocations fail under strict overcommit. A
  further fix keeps userfaultfd tracking intact on neighboring mappings.
  NUMA binding no longer prevents long-term pins when the chosen node
  has only movable memory, fixing QEMU/VFIO startup and io_uring buffer
  registration failures. MGLRU also gets a fix for early-boot crashes
  with memory cgroups disabled at boot, notably in small crash kernels.

* tag 'mm-stable-2026-10-25-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (213 commits)
  mm: multi-gen LRU: fix NULL lruvec->pgdat deref with memcg disabled on cmdline
  mm/page_counter: use WRITE_ONCE() for emin/elow when parent is the root
  mm/memcontrol: publish null pointer before dropping css reference
  test_maple_tree: test maple_range_64 node in RCU mode
  maple_tree: fix maple_range_64 crashes in RCU mode
  mm/vma: avoid broken uffd merge on mremap
  tools/testing/shared: catch a failed posix_memalign()
  mm/damon/core: remove unreachable damos charge_{target,addr}_from
  mm/shrinker: allocate shrinker_info_unit from a dedicated kmem_cache
  riscv: mm: exclude invalid THP PMDs from page table check
  mm/damon/core: filter out damos address filter-split failed region
  fs/proc/task_mmu: pin mm_users in do_pagemap_scan()
  mm/mempolicy: apply bind policies against the scoped allocation zone
  mm/vmscan: reclaim every zone in per-node proactive reclaim
  mm/mremap: correctly uncharge accountable VMAs in error path
  mm/mremap: populate calculated fields in vrm state correctly
  MAINTAINERS: add an entry for MEMORY MANAGEMENT - MEMORY MAP
  mm: bdi: reset min_ratio after the sysfs attributes are gone
  mm/page_vma_mapped: continue past nonmatching huge PMDs
  selftests/mm: skip hugetlb cgroup v2 tests without the needed controllers
  ...
fbcon: Implement struct consw.con_unblank 2026-10-25T07:36:07+00:00 Thomas Zimmermann tzimmermann@suse.de 2026-10-23T13:16:13+00:00 0cfbdd6e43bdfe489646d6b2627af88a9c098b02 Implement con_unblank from struct consw with the !blank branches from fbcon_blank(). The new function is called fbcon_unblank(). Remove the duplicated code from fbcon_blank(). Fbcon tracks fbdev blank state in par->blank_state using fbdev's FB_BLANK constants. In fbcon_unblank() the stored value is always FB_BLANK_UNBLANK. In fbcon_blank(), the new blank state is 1 + plus the VESA blank mode given in the parameter blank. fbcon_blank() now disables the cursor worker unconditionally. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Helge Deller <deller@gmx.de> 
Implement con_unblank from struct consw with the !blank branches from
fbcon_blank(). The new function is called fbcon_unblank(). Remove the
duplicated code from fbcon_blank().

Fbcon tracks fbdev blank state in par->blank_state using fbdev's FB_BLANK
constants. In fbcon_unblank() the stored value is always FB_BLANK_UNBLANK.
In fbcon_blank(), the new blank state is 1 + plus the VESA blank mode
given in the parameter blank.

fbcon_blank() now disables the cursor worker unconditionally.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Merge tag 'fbdev-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev 2026-10-25T05:11:27+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-10-25T05:11:27+00:00 0dfc0090b925243490b5b71bc9a229517cda499a Pull fbdev updates from Helge Deller: "A whole lot of small fixes all over many drivers, but the majority of changes are related to code cleanups regarding the cursor handling in vt and fbcon. Fixes: - core: initialize modelist in framebuffer_alloc() - core: bitblit: fix glyph clipping when fbcon pans - fbcon: restore font geometry if font rotation fails - sh_mobile_lcdcfb: restore the per-overlay sysfs attributes - udlfb: don't rebuild the mode list while the framebuffer is in use - atmel_lcdfb: prevent FIFO work after removal Cleanups: - vt, fbcon, vgacon: cursor code rework & cleanups - MAINTAINERS: name the deller/linux-fbdev for-next branch - drop unused FB_IOMEM_HELPERS_DEFERRED Kconfig option - acornfb: remove unused code - atafb: fix sparse warnings and avoid casts - sstfb: use managed PCI device enable - gxt4500, kyro, nvidia: release write-combining handle on probe failure - various drivers: typo fixes in comments - various drivers: fix error path on fb_deferred_io_init() failure - various drivers: use FB blanking constants instead of VESA constants" * tag 'fbdev-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (53 commits) fbdev: xilinxfb: Use FB blanking constants fbdev: platinumfb: Use FB blanking constants fbdev: sa1100fb: Remove comment on VESA DPMS modes fbdev: i810fb: Use FB blanking constants fbdev: au1100fb: Use FB blanking constants fbcon: Retry rotated font allocation after failure fbcon: Rebuild rotated font buffer on font change fbcon: Include font geometry in the rotated font cache fbdev: bitblit: Fix glyph clipping when fbcon pans fbcon: Replace fbcon_fill_cursor_mask() with fbcon_cursor_glyph() lib/fonts: Add font_glyph_cursor() helper vgacon: Use vt_cursor_{start,end}() vgacon: Remove trailing whitespaces vt: Add cursor-size helpers MAINTAINERS: name the deller/linux-fbdev for-next branch fbdev: atafb: avoid cast when assigning buffer address pointer fbdev: atafb: fix sparse warnings fbdev: atyfb_base: fix typos in comments fbdev: aty128fb: fix typos in comments fbdev: mach64: fix typos in comments ... 
Pull fbdev updates from Helge Deller:
 "A whole lot of small fixes all over many drivers, but the majority of
  changes are related to code cleanups regarding the cursor handling in
  vt and fbcon.

  Fixes:
   - core: initialize modelist in framebuffer_alloc()
   - core: bitblit: fix glyph clipping when fbcon pans
   - fbcon: restore font geometry if font rotation fails
   - sh_mobile_lcdcfb: restore the per-overlay sysfs attributes
   - udlfb: don't rebuild the mode list while the framebuffer is in use
   - atmel_lcdfb: prevent FIFO work after removal

  Cleanups:
   - vt, fbcon, vgacon: cursor code rework & cleanups
   - MAINTAINERS: name the deller/linux-fbdev for-next branch
   - drop unused FB_IOMEM_HELPERS_DEFERRED Kconfig option
   - acornfb: remove unused code
   - atafb: fix sparse warnings and avoid casts
   - sstfb: use managed PCI device enable
   - gxt4500, kyro, nvidia: release write-combining handle on probe failure
   - various drivers: typo fixes in comments
   - various drivers: fix error path on fb_deferred_io_init() failure
   - various drivers: use FB blanking constants instead of VESA constants"

* tag 'fbdev-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (53 commits)
  fbdev: xilinxfb: Use FB blanking constants
  fbdev: platinumfb: Use FB blanking constants
  fbdev: sa1100fb: Remove comment on VESA DPMS modes
  fbdev: i810fb: Use FB blanking constants
  fbdev: au1100fb: Use FB blanking constants
  fbcon: Retry rotated font allocation after failure
  fbcon: Rebuild rotated font buffer on font change
  fbcon: Include font geometry in the rotated font cache
  fbdev: bitblit: Fix glyph clipping when fbcon pans
  fbcon: Replace fbcon_fill_cursor_mask() with fbcon_cursor_glyph()
  lib/fonts: Add font_glyph_cursor() helper
  vgacon: Use vt_cursor_{start,end}()
  vgacon: Remove trailing whitespaces
  vt: Add cursor-size helpers
  MAINTAINERS: name the deller/linux-fbdev for-next branch
  fbdev: atafb: avoid cast when assigning buffer address pointer
  fbdev: atafb: fix sparse warnings
  fbdev: atyfb_base: fix typos in comments
  fbdev: aty128fb: fix typos in comments
  fbdev: mach64: fix typos in comments
  ...
fbdev: defio: assert FBINFO_VIRTFB, drop VM_IO, add VM_MIXEDMAP 2026-10-24T08:56:15+00:00 Lorenzo Stoakes (ARM) ljs@kernel.org 2026-10-13T15:04:59+00:00 19458d015fccbbf2657a8e6417bbaa915c2afdd1 Currently all drivers which use defio allocate system memory. All of them also set FBINFO_VIRTFB, other than ssd1307fb, however this driver allocates system RAM, so simply failed to set this flag when it ought to. This patch sets FBINFO_VIRTFB on ssd1307fb probe, then drops setting VM_IO in fb_deferred_io_mmap() and instead requires FBINFO_VIRTFB to be set, erroring out with a kernel warning if not. The logic requires a page from the driver and since commit 1ecbc7dd2902 ("fbdev/deferred-io: Always call get_page() for framebuffer pages") has always required it to be refcounted, so this was implicitly already the case. Finally this patch sets VM_MIXEDMAP, as the logic is mapping kernel-allocated memory so this is appropriate. Link: https://lore.kernel.org/20261013-b4-mmap-prepare-vma-flag-sanify-v6-19-1aa3c9b139f9@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Suren Baghdasaryan <surenb@google.com> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Cc: Liam R. Howlett <liam@infradead.org> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Jann Horn <jannh@google.com> Cc: Pedro Falcato <pfalcato@suse.de> Cc: Mike Rapoport <rppt@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Leon Romanovsky <leon@kernel.org> Cc: Paul Moore <paul@paul-moore.com> Cc: Stephen Smalley <stephen.smalley.work@gmail.com> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Eduard Zingerman <eddyz87@gmail.com> Cc: Kumar Kartikeya Dwivedi <memxor@gmail.com> Cc: Zi Yan <ziy@nvidia.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Nico Pache <nico.pache@linux.dev> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Dev Jain <dev.jain@arm.com> Cc: Barry Song <baohua@kernel.org> Cc: Lance Yang <lance.yang@linux.dev> Cc: Usama Arif <usama.arif@linux.dev> Cc: Kiryl Shutsemau <kas@kernel.org> Cc: Doug Gilbert <dgilbert@interlog.com> Cc: James Bottomley <james.bottomley@hansenpartnership.com> Cc: Martin K. Petersen <mkp@kernel.org> Cc: Simona Vetter <simona@ffwll.ch> Cc: Helge Deller <deller@gmx.de> Cc: Sebastian Reichel <sre@kernel.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Peter Xu <peterx@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Rik van Riel <riel@surriel.com> Cc: Harry Yoo <harry@kernel.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: David Airlie <airlied@gmail.com> Cc: Will Deacon <will@kernel.org> Cc: Aneesh Kumar K.V <aneesh.kumar@kernel.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Muchun Song <muchun.song@linux.dev> Cc: Oscar Salvador <osalvador@suse.de> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Jan Kara <jack@suse.cz> Cc: Marc Zyngier <maz@kernel.org> Cc: Oliver Upton <oupton@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Anup Patel <anup@brainfault.org> Cc: Paul Walmsley <pjw@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Janosch Frank <frankja@linux.ibm.com> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <brauner@kernel.org> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Joshua Hahn <joshua.hahnjy@gmail.com> Cc: Rakie Kim <rakie.kim@sk.com> Cc: Byungchul Park <byungchul@sk.com> Cc: Gregory Price <gourry@gourry.net> Cc: Ying Huang <ying.huang@linux.alibaba.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Chris Li <chrisl@kernel.org> Cc: Kairui Song <kasong@tencent.com> Cc: Kemeng Shi <shikemeng@huaweicloud.com> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Baoquan He <baoquan.he@linux.dev> Cc: Youngjun Park <youngjun.park@lge.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Qi Zheng <qi.zheng@linux.dev> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Yuanchu Xie <yuanchu@google.com> Cc: Wei Xu <weixugc@google.com> Cc: Chengming Zhou <chengming.zhou@linux.dev> Cc: Michal Hocko <mhocko@kernel.org> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: Xu Xin <xu.xin@linux.dev> Cc: Ihor Solodrai <ihor.solodrai@linux.dev> Cc: Bert Karwatzki <spasswolf@web.de> 
Currently all drivers which use defio allocate system memory. All of them
also set FBINFO_VIRTFB, other than ssd1307fb, however this driver allocates
system RAM, so simply failed to set this flag when it ought to.

This patch sets FBINFO_VIRTFB on ssd1307fb probe, then drops setting VM_IO
in fb_deferred_io_mmap() and instead requires FBINFO_VIRTFB to be set,
erroring out with a kernel warning if not.

The logic requires a page from the driver and since commit 1ecbc7dd2902
("fbdev/deferred-io: Always call get_page() for framebuffer pages") has
always required it to be refcounted, so this was implicitly already the
case.

Finally this patch sets VM_MIXEDMAP, as the logic is mapping
kernel-allocated memory so this is appropriate.

Link: https://lore.kernel.org/20261013-b4-mmap-prepare-vma-flag-sanify-v6-19-1aa3c9b139f9@kernel.org
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Jann Horn <jannh@google.com>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <stephen.smalley.work@gmail.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Nico Pache <nico.pache@linux.dev>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Kiryl Shutsemau <kas@kernel.org>
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: James Bottomley <james.bottomley@hansenpartnership.com>
Cc: Martin K. Petersen <mkp@kernel.org>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Helge Deller <deller@gmx.de>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Harry Yoo <harry@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oupton@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Anup Patel <anup@brainfault.org>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Youngjun Park <youngjun.park@lge.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Qi Zheng <qi.zheng@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Cc: Wei Xu <weixugc@google.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Xu Xin <xu.xin@linux.dev>
Cc: Ihor Solodrai <ihor.solodrai@linux.dev>
Cc: Bert Karwatzki <spasswolf@web.de>
fbcon: Retry rotated font allocation after failure 2026-10-20T20:29:20+00:00 Yao Yiqi yaoyiqi3@huawei.com 2026-10-19T09:43:31+00:00 7935db1a4a0f83a63590a222500e5016e2f6c85e fbcon_rotate_font() records the font, its geometry and the rotation in par->rotated before calling font_data_rotate(). If the allocation fails, the error path clears par->rotated.buf, but the recorded key already looks up to date, so the next call takes the early-out and never retries. The rotated putcs/cursor ops keep returning early on the NULL buffer, and the console stays blank even after memory is available again. Also test par->rotated.buf in the early-out, so a failed allocation is retried on the next call: at the next fbcon_switch(), fbcon_modechanged() or font change. Fixes: e4ef723d8975 ("fbcon: Avoid OOB font access if console rotation fails") Cc: stable@vger.kernel.org Signed-off-by: Yao Yiqi <yaoyiqi3@huawei.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Helge Deller <deller@gmx.de> 
fbcon_rotate_font() records the font, its geometry and the rotation in
par->rotated before calling font_data_rotate(). If the allocation
fails, the error path clears par->rotated.buf, but the recorded key
already looks up to date, so the next call takes the early-out and
never retries. The rotated putcs/cursor ops keep returning early on
the NULL buffer, and the console stays blank even after memory is
available again.

Also test par->rotated.buf in the early-out, so a failed allocation
is retried on the next call: at the next fbcon_switch(),
fbcon_modechanged() or font change.

Fixes: e4ef723d8975 ("fbcon: Avoid OOB font access if console rotation fails")
Cc: stable@vger.kernel.org
Signed-off-by: Yao Yiqi <yaoyiqi3@huawei.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
fbcon: Rebuild rotated font buffer on font change 2026-10-20T20:29:20+00:00 Yao Yiqi yaoyiqi3@huawei.com 2026-10-19T09:43:30+00:00 e4b6b865d45d8dafb6c6f28c8a993a5b4431d25a fbcon_rotate_font() caches a rotated copy of the console font in par->rotated.buf. The buffer is sized from the font's width, height and charcount, and is rebuilt in fbcon_init(), fbcon_switch() and fbcon_modechanged(), but not in fbcon_do_set_font(). When the font is changed through KDFONTOP, the new geometry is installed and vc_resize() redraws before the buffer is rebuilt. The rotated putcs/cursor ops then index the old buffer with the new cell size; KASAN reports a slab-out-of-bounds read in soft_cursor(). Rebuild the buffer for the visible console before the redraw, as the other callers do: select the console's blitting state with set_blitting_type() (which also uploads the new font's map on tile-blitting hardware), then rebuild. Background consoles keep their rebuild at fbcon_switch() time, as the buffer is shared per framebuffer and must not be updated for a console that is not being displayed. To ensure a correct rollback when the rebuild or the following vc_resize() fails, save the rotated font state, clear it before rebuilding, and restore it in the error path of fbcon_do_set_font(). Fixes: 6cc50e1c5b57 ("[PATCH] fbcon: Console Rotation - Add support to rotate font bitmap") Cc: stable@vger.kernel.org Signed-off-by: Yao Yiqi <yaoyiqi3@huawei.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Helge Deller <deller@gmx.de> 
fbcon_rotate_font() caches a rotated copy of the console font in
par->rotated.buf. The buffer is sized from the font's width, height
and charcount, and is rebuilt in fbcon_init(), fbcon_switch() and
fbcon_modechanged(), but not in fbcon_do_set_font().

When the font is changed through KDFONTOP, the new geometry is
installed and vc_resize() redraws before the buffer is rebuilt. The
rotated putcs/cursor ops then index the old buffer with the new cell
size; KASAN reports a slab-out-of-bounds read in soft_cursor().

Rebuild the buffer for the visible console before the redraw, as the
other callers do: select the console's blitting state with
set_blitting_type() (which also uploads the new font's map on
tile-blitting hardware), then rebuild. Background consoles keep
their rebuild at fbcon_switch() time, as the buffer is shared per
framebuffer and must not be updated for a console that is not being
displayed.

To ensure a correct rollback when the rebuild or the following
vc_resize() fails, save the rotated font state, clear it before
rebuilding, and restore it in the error path of
fbcon_do_set_font().

Fixes: 6cc50e1c5b57 ("[PATCH] fbcon: Console Rotation - Add support to rotate font bitmap")
Cc: stable@vger.kernel.org
Signed-off-by: Yao Yiqi <yaoyiqi3@huawei.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
fbcon: Include font geometry in the rotated font cache 2026-10-20T20:29:20+00:00 Yao Yiqi yaoyiqi3@huawei.com 2026-10-19T09:43:29+00:00 10463bcd43495fb88ff667b2c5348200860f6bdc fbcon_rotate_font() caches a rotated copy of the console font and skips the rebuild when the fontdata pointer and the rotation match. Raw font data carries no geometry, though: width, height and charcount live in vc->vc_font. fbcon_set_font() deduplicates uploads by byte equality, so the same bytes re-uploaded with different dimensions keep the fontdata pointer while the geometry changes, and the early-out skips the rebuild. The rotated cell size depends on the geometry (rotation swaps width and height), so the stale buffer is indexed with the new cell size. Re-uploading a 4x16 font as 16x8 on a CW-rotated console, for example, doubles the rotated cell size and reads past the end of the old buffer. Record the geometry the buffer was built from and compare it in the early-out. The pointer-only key used to be backed by an explicit width check in the deduplication, which commit 1e3c49aa03fb ("lib/fonts: Compare font data for equality with font_data_is_equal()") dropped. Fixes: 6cc50e1c5b57 ("[PATCH] fbcon: Console Rotation - Add support to rotate font bitmap") Cc: stable@vger.kernel.org Signed-off-by: Yao Yiqi <yaoyiqi3@huawei.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Helge Deller <deller@gmx.de> 
fbcon_rotate_font() caches a rotated copy of the console font and
skips the rebuild when the fontdata pointer and the rotation match.
Raw font data carries no geometry, though: width, height and
charcount live in vc->vc_font. fbcon_set_font() deduplicates uploads
by byte equality, so the same bytes re-uploaded with different
dimensions keep the fontdata pointer while the geometry changes, and
the early-out skips the rebuild.

The rotated cell size depends on the geometry (rotation swaps width
and height), so the stale buffer is indexed with the new cell size.
Re-uploading a 4x16 font as 16x8 on a CW-rotated console, for
example, doubles the rotated cell size and reads past the end of the
old buffer.

Record the geometry the buffer was built from and compare it in the
early-out. The pointer-only key used to be backed by an explicit
width check in the deduplication, which commit 1e3c49aa03fb
("lib/fonts: Compare font data for equality with font_data_is_equal()")
dropped.

Fixes: 6cc50e1c5b57 ("[PATCH] fbcon: Console Rotation - Add support to rotate font bitmap")
Cc: stable@vger.kernel.org
Signed-off-by: Yao Yiqi <yaoyiqi3@huawei.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
fbdev: bitblit: Fix glyph clipping when fbcon pans 2026-10-20T20:27:07+00:00 Tingjie Zhong catme0w@live.cn 2026-10-20T16:46:57+00:00 06fccf840640d8f6b0e08a1756f8d2f0435b4cbe Commit 3637d34b35b2 ("fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds") made bit_putcs() clip glyphs to var.yres. When fbcon scrolls by panning, it draws text rows up to var.yres_virtual, so after the first pan most new text is not drawn until the next full redraw. This affects fbdev drivers that set FBINFO_HWACCEL_YPAN or FBINFO_HWACCEL_YWRAP, such as vesafb with the ypan option, when CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION=y. Clip to GETVYRES() instead, which fbcon_ud.c and fbcon_ccw.c already use as the drawing area height. When fbcon does not pan, GETVYRES() returns var.yres, keeping the existing bound. When fbcon pans, it returns var.yres_virtual, which the framebuffer memory must cover anyway for panning to work. Fixes: 3637d34b35b2 ("fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds") Reported-by: Thomas Zimmermann <tzimmermann@suse.de> Closes: https://lore.kernel.org/linux-fbdev/b8b52ffd-ecec-4fba-b432-ba32135c2f99@suse.de/ Tested-by: Thomas Zimmermann <tzimmermann@suse.de> Cc: stable@vger.kernel.org Signed-off-by: Tingjie Zhong <catme0w@live.cn> Signed-off-by: Helge Deller <deller@gmx.de> 
Commit 3637d34b35b2 ("fbdev: Add bounds checking in bit_putcs to fix
vmalloc-out-of-bounds") made bit_putcs() clip glyphs to var.yres. When
fbcon scrolls by panning, it draws text rows up to var.yres_virtual,
so after the first pan most new text is not drawn until the next full
redraw. This affects fbdev drivers that set FBINFO_HWACCEL_YPAN or
FBINFO_HWACCEL_YWRAP, such as vesafb with the ypan option, when
CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION=y.

Clip to GETVYRES() instead, which fbcon_ud.c and fbcon_ccw.c already
use as the drawing area height. When fbcon does not pan, GETVYRES()
returns var.yres, keeping the existing bound. When fbcon pans, it
returns var.yres_virtual, which the framebuffer memory must cover
anyway for panning to work.

Fixes: 3637d34b35b2 ("fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds")
Reported-by: Thomas Zimmermann <tzimmermann@suse.de>
Closes: https://lore.kernel.org/linux-fbdev/b8b52ffd-ecec-4fba-b432-ba32135c2f99@suse.de/
Tested-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Tingjie Zhong <catme0w@live.cn>
Signed-off-by: Helge Deller <deller@gmx.de>
fbcon: Replace fbcon_fill_cursor_mask() with fbcon_cursor_glyph() 2026-10-19T11:56:01+00:00 Thomas Zimmermann tzimmermann@suse.de 2026-10-05T13:31:03+00:00 54ddfe9a7eef0d207d72338ea009278998f87668 The kernel's font library provides font_glyph_cursor() to create cursor glyphs. Replace fbcon's fbcon_fill_cursor_mask() with a new helper that uses font_glyph_cursor(). The cursor shapes remain mostly unchanged. The only exception is in underline cursors for fonts with a size larger than 10. The underlining dash is now one pixel closer to the font-glyph data, so that the cursor looks less detached. This follows the style used by vgacon. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Helge Deller <deller@gmx.de> Signed-off-by: Helge Deller <deller@gmx.de> 
The kernel's font library provides font_glyph_cursor() to create cursor
glyphs. Replace fbcon's fbcon_fill_cursor_mask() with a new helper that
uses font_glyph_cursor().

The cursor shapes remain mostly unchanged. The only exception is in
underline cursors for fonts with a size larger than 10. The underlining
dash is now one pixel closer to the font-glyph data, so that the cursor
looks less detached. This follows the style used by vgacon.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>