Kiryl Shutsemau (Meta) 134c1d031a mm: add VM_UFFD_RWP VMA flag ... Preparatory patch for userfaultfd read-write protection (RWP). RWP extends userfaultfd protection from plain write-protection (WP) to full read-write protection: accesses to an RWP-protected range -- reads as well as writes -- trap through userfaultfd. Reserve VM_UFFD_RWP, add the userfaultfd_rwp() and userfaultfd_protected() helpers, and wire up the smaps "ur" entry and the trace-flag table the rest of the series will use. The flag is gated on CONFIG_USERFAULTFD_RWP, which is introduced together with the UAPI in a later patch; until then VM_UFFD_RWP aliases VM_NONE and every downstream check folds to dead code. Nothing sets or queries the flag yet. Link: https://lore.kernel.org/20260708111417.173443-6-kirill@shutemov.name Signed-off-by: Kiryl Shutsemau <kas@kernel.org> Assisted-by: Claude:claude-opus-4-6 Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: SeongJae Park <sj@kernel.org> Reviewed-by: Lorenzo Stoakes <ljs@kernel.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Hildenbrand <david@kernel.org> Cc: James Houghton <jthoughton@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam@infradead.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Xu <peterx@redhat.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2026-08-04 19:18:37 -07:00
..
caching	doc: correcting the debug path for cachefiles	2024-10-24 13:50:27 +02:00
ext4	Documentation: ext4: Document casefold and encrypt flags	2025-11-26 17:13:34 -05:00
fuse	Documentation: fuse: Consolidate FUSE docs into its own subdirectory	2025-08-27 14:29:43 +02:00
gfs2	Documentation: gfs2: Consolidate GFS2 docs into its own subdirectory	2025-10-31 21:00:43 +00:00
iomap	fs, iomap: remove IOCB_DIO_CALLER_COMP	2025-11-25 10:22:18 +01:00
nfs	NFSD: Sign filehandles	2026-03-29 21:25:09 -04:00
smb	ksmbd: doc: update feature support status for durable handles and compression	2026-06-30 21:29:46 -05:00
spufs	docs: spufs: fix ppc64 architecture line break	2026-01-06 15:21:26 -07:00
xfs	xfs: new code for v6.19	2025-12-03 20:19:38 -08:00
9p.rst	9p: Add mount option for negative dentry cache retention	2026-06-21 05:22:56 +00:00
adding-new-filesystems.rst	docs: add guidelines for submitting new filesystems	2026-05-21 13:39:34 +02:00
adfs.rst
affs.rst
afs.rst	afs: Documentation: correct reference to CONFIG_AFS_FS	2023-07-21 13:46:02 -06:00
api-summary.rst	docs: filesystems: add fs/open.c to api-summary	2026-01-16 11:33:15 -07:00
autofs-mount-control.rst	autofs: use flexible array in ioctl structure	2023-05-30 16:42:00 -07:00
autofs.rst	Documentation: filesystems: update filename extensions	2024-11-22 10:31:04 -07:00
automount-support.rst
befs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
bfs.rst
btrfs.rst	MAINTAINERS: remove links to obsolete btrfs.wiki.kernel.org	2023-09-08 14:21:27 +02:00
buffer.rst	doc: split buffer.rst out of api-summary.rst	2024-05-05 17:53:40 -07:00
ceph.rst	doc: ceph: update userspace command to get CephFS metadata	2024-05-23 10:35:47 +02:00
coda.rst	documentation/filesystems: fix spelling mistakes	2025-02-10 10:42:28 -07:00
configfs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
cramfs.rst	Documentation: filesystems: cramfs: correct stale hard-link and endianness claims	2026-05-03 09:12:23 -06:00
dax.rst	doc: Remove misleading reference to brd in dax.rst	2025-06-25 12:49:29 -06:00
debugfs.rst	docs: debugfs: do not recommend debugfs_remove_recursive	2025-04-30 19:11:04 +02:00
devpts.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
directory-locking.rst	Docs: typos/spelling	2024-05-02 10:02:29 -06:00
dlmfs.rst	Documentation: filesystems: update filename extensions	2024-11-22 10:31:04 -07:00
dnotify.rst
ecryptfs.rst
efivarfs.rst	Documentation: Mark the 'efivars' sysfs interface as removed	2024-04-13 10:33:02 +02:00
erofs.rst	erofs: remove fscache backend entirely	2026-06-22 11:00:06 +08:00
ext2.rst	doc : fix a broken link in ext2.rst	2025-12-19 15:01:27 +01:00
ext3.rst
f2fs.rst	f2fs: map data writes to FDP streams	2026-05-22 03:49:06 +00:00
fiemap.rst	fiemap: use kernel-doc includes in fiemap docbook	2024-12-22 11:29:50 +01:00
files.rst	docs: filesystems: fix typo in docs	2024-02-09 10:37:20 +01:00
fscrypt.rst	fscrypt: Drop obsolete recommendation to enable optimized NHPoly1305	2026-01-12 11:07:50 -08:00
fsverity.rst	fs: add FS_XFLAG_VERITY for fs-verity files	2026-01-29 16:00:57 +01:00
hfs.rst
hfsplus.rst
hpfs.rst	Documentation: Fix filesystems typos	2025-08-18 10:31:19 -06:00
idmappings.rst	doc: correcting two prefix errors in idmappings.rst	2025-03-05 11:54:18 +01:00
index.rst	docs: add guidelines for submitting new filesystems	2026-05-21 13:39:34 +02:00
inotify.rst
isofs.rst	docs: isofs: replace dead ECMA-119 FTP link	2026-04-27 12:58:07 +02:00
journalling.rst	jbd2: remove unused transaction->t_private_list	2025-02-10 07:48:24 -05:00
locking.rst	Things have calmed down a bit on the docs front, with no earthshaking	2026-06-16 08:35:59 +05:30
locks.rst	docs: fs: locks.rst: update comment about mandatory file locking	2021-10-19 06:48:21 -04:00
mmap_prepare.rst	mm: add mmap_action_map_kernel_pages[_full]()	2026-04-05 13:53:45 -07:00
mount_api.rst	fs: remove fsparam_path / fs_param_is_path	2026-02-19 14:34:26 +01:00
multigrain-ts.rst	Documentation: add a new file documenting multigrain timestamps	2024-10-10 10:20:52 +02:00
netfs_library.rst	fs/netfs: remove unused flag NETFS_SREQ_SEEK_DATA_READ	2025-05-21 14:34:37 +02:00
nilfs2.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
ntfs.rst	docs/fs/ntfs: add mount options to support Windows native symbolic links	2026-06-15 19:39:45 +09:00
ntfs3.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
ocfs2-online-filecheck.rst	Documentation: ocfs2: Properly reindent filecheck operations list	2025-08-29 15:50:50 -06:00
ocfs2.rst	docs: update ocfs2-devel mailing list address	2023-07-08 09:29:29 -07:00
omfs.rst
orangefs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
overlayfs.rst	ovl: make fsync after metadata copy-up opt-in mount option	2026-03-27 12:48:10 +01:00
path-lookup.rst	docs: path-lookup: fix unrenamed WALK_GET	2026-03-22 14:54:23 -06:00
path-lookup.txt	Documentation: filesystems: update filename extensions	2024-11-22 10:31:04 -07:00
porting.rst	dentry memory safety stuff	2026-06-15 04:15:31 +05:30
proc.rst	mm: add VM_UFFD_RWP VMA flag	2026-08-04 19:18:37 -07:00
propagate_umount.txt	docs: fix trailing whitespace error and remove repeated words in propagate_umount.txt	2025-08-21 12:49:01 -06:00
qnx6.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
quota.rst
ramfs-rootfs-initramfs.rst	fs: use nullfs unconditionally as the real rootfs	2026-01-14 11:23:39 +01:00
relay.rst	docs: fix 're-use' -> 'reuse' in documentation	2026-02-02 09:54:15 -07:00
resctrl.rst	fs/resctrl: Document tasks file behaviour for task id 0 and idle tasks	2026-05-08 12:27:00 +02:00
romfs.rst
seq_file.rst	Documentation: seq_file: drop 2.6 reference	2026-04-10 08:39:08 -06:00
sharedsubtree.rst	Documentation: sharedsubtree: Convert notes to note directive	2025-08-29 16:40:01 -06:00
splice.rst
squashfs.rst	Documentation: update the Squashfs filesystem documentation	2025-01-24 22:47:21 -08:00
sysfs.rst	kernel.h: move VERIFY_OCTAL_PERMISSIONS() to sysfs.h	2026-01-31 16:16:05 -08:00
tmpfs.rst	docs: tmpfs: Add casefold options	2024-10-28 13:36:55 +01:00
ubifs-authentication.rst	Documentation: treewide: Replace remaining spinics links with lore	2025-06-21 14:20:51 -06:00
ubifs.rst	Documentation: ubifs: Fix compression idiom	2022-10-10 13:01:10 -06:00
udf.rst
vfat.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
vfs.rst	vfs-7.0-rc1.namespace	2026-02-09 14:43:47 -08:00
virtiofs.rst
zonefs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00