char and misc drivers · Supported

Maintainers

• M Arnd Bergmann <arnd@arndb.de>
• M Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Paths

• F drivers/char/
• F drivers/misc/
• F include/linux/miscdevice.h
• F rust/kernel/miscdevice.rs
• F samples/rust/rust_misc_device.rs
• X drivers/char/agp/
• X drivers/char/hw_random/
• X drivers/char/ipmi/
• X drivers/char/random.c
• X drivers/char/tpm/

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH v3 00/15] mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff
  2026-07-29 16:50 · 1 reply in 7d · "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
• HOTtoday [PATCH RFC 00/11] mm: distinguish PTE table storage from PTE values
  2026-07-27 16:48 · 1 reply in 7d · Muhammad Usama Anjum <hidden>
• COOLING6d [PATCH v7 0/8] seccomp: non-cooperative pinned-memfd argument redirect
  2026-07-24 22:02 · 1 reply in 7d · Cong Wang <hidden>

Active reviewers (last 30 days)

• Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  1 attestation (1 Acked-by) · last on 2026-07-03
• Suren Baghdasaryan <surenb@google.com>
  1 attestation (1 Reviewed-by) · last on 2026-07-03
• Steve Wahl <steve.wahl@hpe.com>
  1 attestation (1 Acked-by) · last on 2026-07-03
• Vlastimil Babka (SUSE) <vbabka@kernel.org>
  1 attestation (1 Reviewed-by) · last on 2026-07-03

Recent patches

Most-recent 30 patches in this subsystem on linux-mm (capped at 30), ordered by date desc.

• HOTtoday [PATCH v3 12/15] mm/vma: only permit MAP_PRIVATE /dev/zero to be mapped anonymous
  2026-07-29 · "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
• HOTtoday [PATCH RFC 09/11] misc/sgi-gru: use ptep_get() for page-table reads
  2026-07-27 · Muhammad Usama Anjum <hidden>
• COOLING6d [PATCH v7 1/8] mm: pass the target mm parameter through get_unmapped_area family
  2026-07-24 · Cong Wang <hidden>
• COOLING4d [PATCH] lkdtm: use kmalloc() instead of __get_free_page
  2026-07-22 · Mahad Ibrahim <hidden>
• WARM2d IN LINUX-NEXT [PATCH v2 12/15] mm/vma: only permit MAP_PRIVATE /dev/zero to be mapped anonymous
  2026-07-20 · "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
• COOLING10d [PATCH 12/15] mm/vma: only permit MAP_PRIVATE /dev/zero to be mapped anonymous
  2026-07-17 · "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
• COLD15d [PATCH v6 1/8] mm: pass the target mm parameter through get_unmapped_area family
  2026-07-15 · Cong Wang <hidden>
• COOLING8d IN LINUX-NEXT: 37 (37M) [PATCH v5 11/18] sgi-xp: Use higher-level allocator API
  2026-07-03 · Brendan Jackman <jackmanb@google.com>
• COLD29d REVIEWED: 26 (26M) [PATCH v3 11/16] sgi-xp: Use higher-level allocator API
  2026-06-29 · Brendan Jackman <jackmanb@google.com>
• COLD34d [PATCH v2 08/13] sgi-xp: Use higher-level allocator
  2026-06-22 · Brendan Jackman <jackmanb@google.com>
• COLD49d IN MM [PATCH v3 3/3] mm/vma: eliminate mmap_action->error_hook, introduce error_override
  2026-06-02 · Lorenzo Stoakes <ljs@kernel.org>
• COLD49d IN MM: 15 (15M) [PATCH v3 1/3] drivers/char/mem: eliminate unnecessary use of success_hook
  2026-06-02 · Lorenzo Stoakes <ljs@kernel.org>
• COLD58d [PATCH v2 3/3] mm/vma: eliminate mmap_action->error_hook, introduce error_filter
  2026-05-22 · Lorenzo Stoakes <ljs@kernel.org>
• COLD58d [PATCH v2 1/3] drivers/char/mem: eliminate unnecessary use of success_hook
  2026-05-22 · Lorenzo Stoakes <ljs@kernel.org>
• STALE70d [PATCH 3/3] mm/vma: eliminate mmap_action->error_hook, introduce error_filter
  2026-05-21 · Lorenzo Stoakes <ljs@kernel.org>
• STALE70d [PATCH 1/3] drivers/char/mem: eliminate unnecessary use of success_hook
  2026-05-21 · Lorenzo Stoakes <ljs@kernel.org>
• COLD50d [PATCH 04/11] treewide: Convert struct kernel_param_ops initializers to DEFINE_KERNEL_PARAM_OPS
  2026-05-21 · Kees Cook <kees@kernel.org>
• DORMANTno replies [PATCH v2 RESEND] lkdtm: Add folio_lock deadlock scenarios
  2026-05-17 · Yunseong Kim <hidden>
• STALE77d [PATCH 5/7] misc: reject duplicate names in misc_register()
  2026-05-14 · Jia He <hidden>
• STALE85d [PATCH] mm: move phys_mem_access_prot_allowed to header
  2026-05-05 · Rosen Penev <hidden>
• STALE92d [RFC PATCH v1 5/9] uaccess: Switch to copy_{to/from}_user_partial() when relevant
  2026-04-27 · "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
• DORMANTno replies [PATCH v2] lkdtm: Add folio_lock deadlock scenarios
  2026-04-26 · Yunseong Kim <hidden>
• STALE115d [PATCH] lkdtm: Add folio_lock deadlock scenarios
  2026-04-02 · Yunseong Kim <hidden>
• STALE109d REVIEWED: 7 (7M) [PATCH v4 13/21] hpet: replace deprecated mmap hook with mmap_prepare
  2026-03-20 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• STALE109d REVIEWED: 7 (7M) [PATCH v4 12/21] misc: open-dice: replace deprecated mmap hook with mmap_prepare
  2026-03-20 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• STALE132d REVIEWED: 7 (7M) [PATCH v3 08/16] hpet: replace deprecated mmap hook with mmap_prepare
  2026-03-19 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• STALE132d REVIEWED: 7 (7M) [PATCH v3 07/16] misc: open-dice: replace deprecated mmap hook with mmap_prepare
  2026-03-19 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• STALE133d [PATCH v2 08/16] hpet: replace deprecated mmap hook with mmap_prepare
  2026-03-16 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• STALE133d [PATCH v2 07/16] misc: open-dice: replace deprecated mmap hook with mmap_prepare
  2026-03-16 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• STALE135d [PATCH 08/15] hpet: replace deprecated mmap hook with mmap_prepare
  2026-03-12 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE192d [PATCH 08/12] mm: update all remaining mmap_prepare users to use vma_flags_t
  2026-01-19 · Lorenzo Stoakes <hidden>
• STALE167d [RFC PATCH v3 2/6] /dev/mem: Add initial documentation of memory_open() and mem_fops
  2026-02-12 · Gabriele Paoloni <hidden>
• STALE167d [RFC PATCH v3 4/6] char: mem: expose devmem helpers for KUnit testing
  2026-02-12 · Gabriele Paoloni <hidden>
• STALE167d [RFC PATCH v3 5/6] char: mem: add KUnit tests for /dev/mem read_mem()
  2026-02-12 · Gabriele Paoloni <hidden>
• STALE154d [PATCH RFC 14/15] mm, swap: add a special device for ghost swap setup
  2026-02-19 · Kairui Song via B4 Relay <devnull+kasong.tencent.com@kernel.org>
• STALE135d [PATCH 07/15] misc: open-dice: replace deprecated mmap hook with mmap_prepare
  2026-03-12 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• STALE135d [PATCH 08/15] hpet: replace deprecated mmap hook with mmap_prepare
  2026-03-12 · "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
• DORMANTno replies [PATCH v2] lkdtm: Add folio_lock deadlock scenarios
  2026-04-26 · Yunseong Kim <hidden>
• STALE70d [PATCH 3/3] mm/vma: eliminate mmap_action->error_hook, introduce error_filter
  2026-05-21 · Lorenzo Stoakes <ljs@kernel.org>