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Brian Geffon 14d071134c Revert "mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio" 
This reverts commit cd544fd1dc.

As discussed in [1] this commit was a no-op because the mapping type was
checked in vma_to_resize before move_vma is ever called.  This meant that
vm_ops->mremap() would never be called on such mappings.  Furthermore,
we've since expanded support of MREMAP_DONTUNMAP to non-anonymous
mappings, and these special mappings are still protected by the existing
check of !VM_DONTEXPAND and !VM_PFNMAP which will result in a -EINVAL.

1. https://lkml.org/lkml/2020/12/28/2340

Link: https://lkml.kernel.org/r/20210323182520.2712101-2-bgeffon@google.com
Signed-off-by: Brian Geffon <bgeffon@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Alejandro Colomar <alx.manpages@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: "Michael S . Tsirkin" <mst@redhat.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Sonny Rao <sonnyrao@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-04-30 11:20:39 -07:00
..
9p
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adfs
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affs
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afs
Merge tag 'afs-netfs-lib-20210426' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
2021-04-27 13:27:39 -07:00
autofs
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befs
fs/befs: Delete obsolete TODO file
2021-03-30 16:54:49 -07:00
bfs
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btrfs
Merge branch 'miklos.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 11:18:24 -07:00
cachefiles
fscache, cachefiles: Add alternate API to use kiocb for read/write to cache
2021-04-23 10:14:32 +01:00
ceph
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cifs
Merge branch 'work.inode-type-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 10:57:42 -07:00
coda
coda: fix reference counting in coda_file_mmap error path
2021-04-23 14:42:39 -07:00
configfs
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cramfs
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crypto
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2021-04-26 08:51:23 -07:00
debugfs
Merge tag 'sched-core-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2021-04-28 13:33:57 -07:00
devpts
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dlm
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ecryptfs
ecryptfs: stack fileattr ops
2021-04-12 15:04:29 +02:00
efivarfs
efivars: convert to fileattr
2021-04-12 15:04:29 +02:00
efs
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erofs
erofs: enable big pcluster feature
2021-04-10 03:20:19 +08:00
exfat
exfat: speed up iterate/lookup by fixing start point of traversing cluster chain
2021-04-27 20:45:07 +09:00
exportfs
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ext2
Merge tag 'fsnotify_for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2021-04-29 11:06:13 -07:00
ext4
Merge tag 'fsnotify_for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2021-04-29 11:06:13 -07:00
f2fs
Merge tag 'netfs-lib-20210426' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
2021-04-27 13:08:12 -07:00
fat
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freevxfs
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fscache
fscache, cachefiles: Add alternate API to use kiocb for read/write to cache
2021-04-23 10:14:32 +01:00
fuse
Merge branch 'miklos.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 11:18:24 -07:00
gfs2
Merge tag 'gfs2-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
2021-04-29 10:33:35 -07:00
hfs
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hfsplus
hfsplus: convert to fileattr
2021-04-12 15:04:29 +02:00
hostfs
Merge branch 'work.inode-type-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 10:57:42 -07:00
hpfs
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hugetlbfs
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iomap
iomap: use filemap_range_needs_writeback() for O_DIRECT reads
2021-04-30 11:20:36 -07:00
isofs
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jbd2
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jffs2
fs/jffs2: Delete obsolete TODO file
2021-03-30 16:54:49 -07:00
jfs
jfs: convert to fileattr
2021-04-12 15:04:29 +02:00
kernfs
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lockd
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minix
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netfs
netfs: Miscellaneous fixes
2021-04-26 23:23:41 +01:00
nfs
Merge tag 'selinux-pr-20210426' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
2021-04-27 13:42:11 -07:00
nfs_common
NFSD: Add an xdr_stream-based encoder for NFSv2/3 ACLs
2021-03-22 10:19:00 -04:00
nfsd
Merge branch 'work.inode-type-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 10:57:42 -07:00
nilfs2
nilfs2: convert to fileattr
2021-04-12 15:04:30 +02:00
nls
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notify
fanotify_user: use upper_32_bits() to verify mask
2021-03-25 15:33:45 +01:00
ntfs
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ocfs2
ocfs2/dlm: remove unused function
2021-04-30 11:20:35 -07:00
omfs
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openpromfs
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orangefs
Merge branch 'miklos.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 11:18:24 -07:00
overlayfs
Merge branch 'miklos.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 11:18:24 -07:00
proc
Merge tag 'kbuild-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2021-04-29 14:24:39 -07:00
pstore
Merge tag 'printk-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
2021-04-27 18:09:44 -07:00
qnx4
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qnx6
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quota
quota: report warning limits for realtime space quotas
2021-03-18 17:03:54 +01:00
ramfs
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reiserfs
Merge tag 'for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2021-04-29 10:51:29 -07:00
romfs
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squashfs
squashfs: fix xattr id and id lookup sanity checks
2021-03-25 09:22:55 -07:00
sysfs
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sysv
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tracefs
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ubifs
Merge branch 'miklos.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-04-27 11:18:24 -07:00
udf
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ufs
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unicode
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vboxsf
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verity
fsverity: relax build time dependency on CRYPTO_SHA256
2021-04-22 17:31:32 +10:00
xfs
Merge tag 'xfs-5.13-merge-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
2021-04-29 10:43:51 -07:00
zonefs
Merge tag 'fsnotify_for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2021-04-29 11:06:13 -07:00
aio.c
Revert "mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio"
2021-04-30 11:20:39 -07:00
anon_inodes.c
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attr.c
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bad_inode.c
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binfmt_aout.c
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binfmt_elf_fdpic.c
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binfmt_elf.c
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binfmt_em86.c
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binfmt_flat.c
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binfmt_misc.c
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binfmt_script.c
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block_dev.c
Merge tag 'for-5.13/drivers-2021-04-27' of git://git.kernel.dk/linux-block
2021-04-28 14:39:37 -07:00
buffer.c
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char_dev.c
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compat_binfmt_elf.c
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coredump.c
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d_path.c
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dax.c
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dcache.c
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direct-io.c
fs: direct-io: fix missing sdio->boundary
2021-04-09 14:54:23 -07:00
drop_caches.c
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eventfd.c
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eventpoll.c
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exec.c
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fcntl.c
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fhandle.c
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file_table.c
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file.c
file: fix close_range() for unshare+cloexec
2021-04-02 14:11:10 +02:00
filesystems.c
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fs_context.c
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fs_parser.c
vfs: fs_parser: clean up kernel-doc warnings
2021-04-30 11:20:35 -07:00
fs_pin.c
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fs_struct.c
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fs_types.c
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fs-writeback.c
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fsopen.c
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init.c
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inode.c
Merge tag 'fs.idmapped.helpers.v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
2021-04-27 12:49:42 -07:00
internal.h
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io_uring.c
Merge tag 'for-5.13/io_uring-2021-04-27' of git://git.kernel.dk/linux-block
2021-04-28 14:56:09 -07:00
io-wq.c
io-wq: remove unused io_wqe_need_worker() function
2021-04-20 11:24:22 -06:00
io-wq.h
io-wq: eliminate the need for a manager thread
2021-04-11 17:42:00 -06:00
ioctl.c
vfs: add fileattr ops
2021-04-12 15:04:23 +02:00
Kconfig
netfs: Provide readahead and readpage netfs helpers
2021-04-23 10:14:32 +01:00
Kconfig.binfmt
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kernel_read_file.c
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libfs.c
libfs: fix kernel-doc for mnt_userns
2021-03-23 11:20:25 +01:00
locks.c
Merge tag 'locks-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux
2021-04-26 13:24:39 -07:00
Makefile
netfs: Provide readahead and readpage netfs helpers
2021-04-23 10:14:32 +01:00
mbcache.c
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mount.h
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mpage.c
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namei.c
Merge tag 'fs.idmapped.helpers.v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
2021-04-27 12:49:42 -07:00
namespace.c
fs/namespace: correct/improve kernel-doc notation
2021-03-31 14:22:55 -06:00
no-block.c
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nsfs.c
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open.c
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pipe.c
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pnode.c
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pnode.h
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posix_acl.c
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proc_namespace.c
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read_write.c
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readdir.c
readdir: make sure to verify directory entry for legacy interfaces too
2021-04-17 11:39:49 -07:00
remap_range.c
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select.c
kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
2021-03-16 22:13:10 +01:00
seq_file.c
seq_file: Add a seq_bprintf function
2021-04-27 15:50:15 -07:00
signalfd.c
signal: Introduce TRAP_PERF si_code and si_perf to siginfo
2021-04-16 16:32:41 +02:00
splice.c
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stack.c
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stat.c
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statfs.c
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super.c
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sync.c
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timerfd.c
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userfaultfd.c
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utimes.c
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xattr.c
xattr: fix kernel-doc for mnt_userns and vfs xattr helpers
2021-03-23 11:20:26 +01:00