linux/fs
Darrick J. Wong 95472274b6
fsdax: remove zeroing code from dax_unshare_iter
Remove the code in dax_unshare_iter that zeroes the destination memory
because it's not necessary.

If srcmap is unwritten, we don't have to do anything because that
unwritten extent came from the regular file mapping, and unwritten
extents cannot be shared.  The same applies to holes.

Furthermore, zeroing to unshare a mapping is just plain wrong because
unsharing means copy on write, and we should be copying data.

This is effectively a revert of commit 13dd4e0462 ("fsdax: unshare:
zero destination if srcmap is HOLE or UNWRITTEN")

Cc: ruansy.fnst@fujitsu.com
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/172796813311.1131942.16033376284752798632.stgit@frogsfrogsfrogs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-10-07 13:51:47 +02:00
..
9p netfs: Speed up buffered reading 2024-09-12 12:20:41 +02:00
adfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
affs affs-for-6.12-tag 2024-09-16 13:07:59 +02:00
afs afs: Fix the setting of the server responding flag 2024-09-27 18:29:20 +02:00
autofs autofs: add per dentry expire timeout 2024-08-30 08:22:36 +02:00
bcachefs bcachefs: rename version -> bversion for big endian builds 2024-09-29 23:55:52 -04:00
befs befs: Convert befs_symlink_read_folio() to use folio_end_read() 2024-05-31 12:31:39 +02:00
bfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
btrfs for-6.12-tag 2024-09-23 11:49:02 -07:00
cachefiles cachefiles: fix dentry leak in cachefiles_open_file() 2024-09-27 18:29:19 +02:00
ceph Three CephFS fixes from Xiubo and Luis and a bunch of assorted 2024-09-28 08:40:36 -07:00
coda coda: use param->file for FSCONFIG_SET_FD 2024-08-19 13:45:03 +02:00
configfs fs/configfs: Add a callback to determine attribute visibility 2024-06-17 20:42:57 +02:00
cramfs vfs-6.11.module.description 2024-07-15 11:14:59 -07:00
crypto The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
debugfs [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
devpts
dlm [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
ecryptfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
efivarfs [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
efs vfs-6.11.module.description 2024-07-15 11:14:59 -07:00
erofs erofs: reject inodes with negative i_size 2024-09-12 23:00:09 +08:00
exfat exfat: resolve memory leak from exfat_create_upcase_table() 2024-09-23 21:38:13 +09:00
exportfs fhandle: relax open_by_handle_at() permission checks 2024-05-28 15:57:23 +02:00
ext2 vfs-6.12.file 2024-09-16 09:14:02 +02:00
ext4 struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
f2fs f2fs-6.12-rc1 2024-09-24 15:12:38 -07:00
fat fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
freevxfs freevxfs: Convert freevxfs to the new mount API. 2024-03-26 09:04:53 +01:00
fuse [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
gfs2 gfs2 changes 2024-09-23 11:55:17 -07:00
hfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
hfsplus fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
hostfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
hpfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
hugetlbfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
iomap iomap: share iomap_unshare_iter predicate code with fsdax 2024-10-07 13:51:47 +02:00
isofs isofs: Annotate struct SL_component with __counted_by() 2024-09-02 15:52:56 +02:00
jbd2 jbd2: remove unneeded check of ret in jbd2_fc_get_buf 2024-08-26 23:49:15 -04:00
jffs2 jffs2: Use a folio in jffs2_garbage_collect_dnode() 2024-08-19 13:40:00 +02:00
jfs A few fixes for jfs 2024-09-19 06:38:43 +02:00
kernfs kernfs: mount: Remove unnecessary ‘NULL’ values from knparent 2024-05-04 19:02:39 +02:00
lockd sunrpc: allow svc threads to fail initialisation cleanly 2024-09-20 19:31:03 -04:00
minix buffer: Convert __block_write_begin() to take a folio 2024-08-07 11:33:36 +02:00
netfs netfs: Fix missing wakeup after issuing writes 2024-10-02 16:56:15 +02:00
nfs NFS Client Updates for Linux 6.12 2024-09-24 15:44:18 -07:00
nfs_common nfs: add LOCALIO support 2024-09-23 15:03:30 -04:00
nfsd nfsd: implement server support for NFS_LOCALIO_PROGRAM 2024-09-23 15:03:30 -04:00
nilfs2 Many singleton patches - please see the various changelogs for details. 2024-09-21 08:20:50 -07:00
nls fs: nls: add missing MODULE_DESCRIPTION() macros 2024-06-03 16:37:07 +02:00
notify struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
ntfs3 fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
ocfs2 ocfs2: fix uninit-value in ocfs2_get_block() 2024-09-26 14:01:45 -07:00
omfs fs: Convert aops->write_begin to take a folio 2024-08-07 11:33:21 +02:00
openpromfs openpromfs: add missing MODULE_DESCRIPTION() macro 2024-06-20 09:46:01 +02:00
orangefs orangefs: Constify struct kobj_type 2024-09-20 19:34:00 -07:00
overlayfs ovl: fix file leak in ovl_real_fdget_meta() 2024-09-27 12:38:47 -07:00
proc Summary 2024-09-24 11:08:40 -07:00
pstore drm next for 6.12-rc1 2024-09-19 10:18:15 +02:00
qnx4 qnx4: add MODULE_DESCRIPTION() 2024-05-28 11:52:53 +02:00
qnx6 qnx6: Convert directory handling to use kmap_local 2024-08-07 11:31:56 +02:00
quota \n 2024-09-23 10:49:28 -07:00
ramfs mm: switch mm->get_unmapped_area() to a flag 2024-04-25 20:56:25 -07:00
reiserfs buffer: Convert __block_write_begin() to take a folio 2024-08-07 11:33:36 +02:00
romfs romfs: fix romfs_read_folio() 2024-08-21 22:32:58 +02:00
smb 5 smb3 server fixes 2024-09-28 08:35:21 -07:00
squashfs Many singleton patches - please see the various changelogs for details. 2024-09-21 08:20:50 -07:00
sysfs Merge 6.9-rc5 into driver-core-next 2024-04-23 13:27:43 +02:00
sysv buffer: Convert __block_write_begin() to take a folio 2024-08-07 11:33:36 +02:00
tests execve: Move KUnit tests to tests/ subdirectory 2024-07-22 18:25:47 -07:00
tracefs eventfs: Use list_del_rcu() for SRCU protected list variable 2024-09-05 10:18:48 -04:00
ubifs [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
udf vfs-6.12.file 2024-09-16 09:14:02 +02:00
ufs vfs-6.12.file 2024-09-16 09:14:02 +02:00
unicode unicode: add MODULE_DESCRIPTION() macros 2024-06-20 19:30:02 -04:00
vboxsf fs: Convert aops->write_end to take a folio 2024-08-07 11:32:02 +02:00
verity fsverity: expose verified fsverity built-in signatures to LSMs 2024-08-20 14:03:18 -04:00
xfs xfs: don't allocate COW extents when unsharing a hole 2024-10-07 13:51:46 +02:00
zonefs iomap: add a private argument for iomap_file_buffered_write 2024-09-03 15:01:23 +02:00
aio.c fs/aio: Fix __percpu annotation of *cpu pointer in struct kioctx 2024-08-19 13:45:03 +02:00
anon_inodes.c fs: Create anon_inode_getfile_fmode() 2024-04-26 10:33:05 +02:00
attr.c nfsd-6.11 fixes: 2024-08-29 06:20:44 +12:00
backing-file.c backing-file: convert to using fops->splice_write 2024-08-23 13:08:31 +02:00
bad_inode.c
binfmt_elf_fdpic.c binfmt_elf_fdpic: fix AUXV size calculation when ELF_HWCAP2 is defined 2024-08-26 13:00:38 -07:00
binfmt_elf.c Revert "binfmt_elf, coredump: Log the reason of the failed core dumps" 2024-09-26 11:39:02 -07:00
binfmt_flat.c binfmt_flat: Fix corruption when not offsetting data start 2024-08-09 20:19:00 -07:00
binfmt_misc.c vfs-6.11.module.description 2024-07-15 11:14:59 -07:00
binfmt_script.c fs: binfmt: add missing MODULE_DESCRIPTION() macros 2024-05-28 12:06:51 +02:00
bpf_fs_kfuncs.c bpf: Add kfunc bpf_get_dentry_xattr() to read xattr from dentry 2024-08-07 11:26:54 -07:00
buffer.c vfs-6.12.folio 2024-09-16 08:54:30 +02:00
char_dev.c
compat_binfmt_elf.c
coredump.c Revert "binfmt_elf, coredump: Log the reason of the failed core dumps" 2024-09-26 11:39:02 -07:00
d_path.c
dax.c fsdax: remove zeroing code from dax_unshare_iter 2024-10-07 13:51:47 +02:00
dcache.c vfs-6.12.misc 2024-09-16 08:35:09 +02:00
direct-io.c fs/direct-io: Remove linux/prefetch.h include 2024-08-19 13:45:02 +02:00
drop_caches.c sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
eventfd.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
eventpoll.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
exec.c ALong with the usual shower of singleton patches, notable patch series in 2024-09-21 07:29:05 -07:00
fcntl.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
fhandle.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
file_table.c slab updates for 6.12 2024-09-18 08:53:53 +02:00
file.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
filesystems.c
fs_context.c
fs_parser.c fs_parse: add uid & gid option option parsing helpers 2024-07-02 06:20:49 +02:00
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c inode: port __I_SYNC to var event 2024-08-30 08:22:39 +02:00
fsopen.c [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
init.c
inode.c bcachefs changes for 6.12-rc1 2024-09-23 10:05:41 -07:00
internal.h file: reclaim 24 bytes from f_owner 2024-08-28 13:05:39 +02:00
ioctl.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
Kconfig NFS Client Updates for Linux 6.12 2024-09-24 15:44:18 -07:00
Kconfig.binfmt exec: Add KUnit test for bprm_stack_limits() 2024-06-19 13:13:55 -07:00
kernel_read_file.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
libfs.c vfs-6.12.folio 2024-09-16 08:54:30 +02:00
locks.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
Makefile bpf: introduce new VFS based BPF kfuncs 2024-08-06 09:01:41 -07:00
mbcache.c vfs: remove SLAB_MEM_SPREAD flag usage 2024-02-27 11:21:31 +01:00
mnt_idmapping.c fuse update for 6.12 2024-09-24 15:29:42 -07:00
mount.h vfs-6.12.mount 2024-09-16 11:15:26 +02:00
mpage.c buffer: Remove calls to set and clear the folio error flag 2024-05-31 12:31:43 +02:00
namei.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
namespace.c fuse update for 6.12 2024-09-24 15:29:42 -07:00
nsfs.c [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
open.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
pidfs.c pidfs: check for valid pid namespace 2024-09-27 18:29:19 +02:00
pipe.c [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
pnode.c
pnode.h
posix_acl.c fs: Use in_group_or_capable() helper to simplify the code 2024-08-30 08:22:37 +02:00
proc_namespace.c fs: rename show_mnt_opts -> show_vfsmnt_opts 2024-06-28 14:36:43 +02:00
read_write.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
readdir.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
remap_range.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
select.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
seq_file.c seq_file: Simplify __seq_puts() 2024-05-02 16:28:20 +02:00
signalfd.c struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
splice.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
stack.c
stat.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
statfs.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
super.c vfs-6.12.misc 2024-09-16 08:35:09 +02:00
sync.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
sysctls.c
timerfd.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
userfaultfd.c mm/hugetlb: remove hugetlb_follow_page_mask() leftover 2024-09-01 20:25:57 -07:00
utimes.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
xattr.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00