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David Woodhouse 28f1326710 eventfd: Export eventfd_ctx_do_read() 
Where events are consumed in the kernel, for example by KVM's
irqfd_wakeup() and VFIO's virqfd_wakeup(), they currently lack a
mechanism to drain the eventfd's counter.

Since the wait queue is already locked while the wakeup functions are
invoked, all they really need to do is call eventfd_ctx_do_read().

Add a check for the lock, and export it for them.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20201027135523.646811-2-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-11-15 09:49:10 -05:00
..
9p
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
adfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
affs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
afs
afs: Fix incorrect freeing of the ACL passed to the YFS ACL store op
2020-11-03 09:53:40 -08:00
autofs
autofs: harden ioctl table
2020-10-16 11:11:22 -07:00
befs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
bfs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
btrfs
for-5.10-rc3-tag
2020-11-10 10:07:15 -08:00
cachefiles
cachefiles: Handle readpage error correctly
2020-10-26 10:42:54 -07:00
ceph
ceph: check session state after bumping session->s_seq
2020-11-04 20:55:49 +01:00
cifs
cifs: update internal module version number
2020-10-23 23:41:49 -05:00
coda
docs: filesystems: convert coda.txt to ReST
2020-05-05 09:22:21 -06:00
configfs
fs: configfs: delete repeated words in comments
2020-10-16 11:11:19 -07:00
cramfs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
crypto
fscrypt: fix inline encryption not used on new files
2020-11-11 20:59:07 -08:00
debugfs
debugfs: remove return value of debugfs_create_devm_seqfile()
2020-10-30 08:37:39 +01:00
devpts
…
dlm
networking changes for the 5.10 merge window
2020-10-15 18:42:13 -07:00
ecryptfs
mm, treewide: rename kzfree() to kfree_sensitive()
2020-08-07 11:33:22 -07:00
efivarfs
efivarfs: Replace invalid slashes with exclamation marks in dentries.
2020-09-25 23:29:04 +02:00
efs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
erofs
erofs: fix setting up pcluster for temporary pages
2020-11-04 09:15:48 +08:00
exfat
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
exportfs
…
ext2
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
ext4
ext4: fix sparse warnings in fast_commit code
2020-11-07 00:08:23 -05:00
f2fs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
fat
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
freevxfs
…
fscache
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-06-03 16:27:18 -07:00
fuse
fuse update for 5.10
2020-10-19 14:28:30 -07:00
gfs2
gfs2: Fix case in which ail writes are done to jdata holes
2020-11-12 18:55:20 +01:00
hfs
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
hfsplus
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
hostfs
…
hpfs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
hugetlbfs
hugetlbfs: prevent filesystem stacking of hugetlbfs
2020-08-12 10:57:56 -07:00
iomap
iomap: clean up writeback state logic on writepage error
2020-11-04 08:52:46 -08:00
isofs
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
jbd2
jbd2: fix up sparse warnings in checkpoint code
2020-11-07 00:09:08 -05:00
jffs2
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
jfs
fs: Introduce i_blocks_per_page
2020-09-21 08:59:26 -07:00
kernfs
fsnotify: pass dir and inode arguments to fsnotify()
2020-07-27 23:15:48 +02:00
lockd
The one new feature this time, from Anna Schumaker, is READ_PLUS, which
2020-10-22 09:44:27 -07:00
minix
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
nfs
NFS: Remove unnecessary inode lock in nfs_fsync_dir()
2020-11-12 10:41:26 -05:00
nfs_common
NFSv4.2: Fix NFS4ERR_STALE error when doing inter server copy
2020-10-21 10:31:20 -04:00
nfsd
NFSD: fix missing refcount in nfsd4_copy by nfsd4_do_async_copy
2020-11-05 17:25:14 -05:00
nilfs2
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
nls
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
notify
mm, memcg: rework remote charging API to support nesting
2020-10-18 09:27:09 -07:00
ntfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
ocfs2
jbd2: rename j_maxlen to j_total_len and add jbd2_journal_max_txn_bufs
2020-11-06 23:01:02 -05:00
omfs
fs: omfs: use kmemdup() rather than kmalloc+memcpy
2020-09-22 23:39:45 -04:00
openpromfs
…
orangefs
orangefs: remove unnecessary assignment to variable ret
2020-08-04 15:01:58 -04:00
overlayfs
ovl: use generic vfs_ioc_setflags_prepare() helper
2020-10-06 15:38:15 +02:00
proc
Merge branch 'hch' (patches from Christoph)
2020-11-08 10:11:31 -08:00
pstore
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
qnx4
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
qnx6
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
quota
\n
2020-10-15 14:56:15 -07:00
ramfs
ramfs: fix nommu mmap with gaps in the page cache
2020-10-16 11:11:22 -07:00
reiserfs
reiserfs: Fix oops during mount
2020-10-01 11:15:31 +02:00
romfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
squashfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
sysfs
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
2020-10-02 12:02:30 +02:00
sysv
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
tracefs
…
ubifs
This pull request contains fixes for UBI and UBIFS
2020-10-18 09:56:50 -07:00
udf
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
ufs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
unicode
unicode: Add utf8_casefold_hash
2020-09-10 14:03:31 -07:00
vboxsf
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2020-10-15 15:11:56 -07:00
verity
fs-verity: use smp_load_acquire() for ->i_verity_info
2020-07-21 16:02:41 -07:00
xfs
xfs: only flush the unshared range in xfs_reflink_unshare
2020-11-04 17:41:56 -08:00
zonefs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
aio.c
Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-12 16:35:51 -07:00
anon_inodes.c
…
attr.c
…
bad_inode.c
fs: move the fiemap definitions out of fs.h
2020-06-03 23:16:55 -04:00
binfmt_aout.c
exec: Rename flush_old_exec begin_new_exec
2020-05-07 16:55:47 -05:00
binfmt_elf_fdpic.c
binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot
2020-10-16 11:11:21 -07:00
binfmt_elf.c
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
binfmt_em86.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
binfmt_flat.c
binfmt_flat: revert "binfmt_flat: don't offset the data start"
2020-08-24 08:49:13 +10:00
binfmt_misc.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
binfmt_script.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
block_dev.c
block: add a bdget_part helper
2020-10-05 10:38:33 -06:00
buffer.c
mm, memcg: rework remote charging API to support nesting
2020-10-18 09:27:09 -07:00
char_dev.c
vfs: allow unprivileged whiteout creation
2020-05-14 16:44:23 +02:00
compat_binfmt_elf.c
Split the old READ_IMPLIES_EXEC workaround from executable PT_GNU_STACK
2020-06-05 13:45:21 -07:00
coredump.c
binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot
2020-10-16 11:11:21 -07:00
d_path.c
fs: fix NULL dereference due to data race in prepend_path()
2020-10-14 14:54:45 -07:00
dax.c
fuse update for 5.10
2020-10-19 14:28:30 -07:00
dcache.c
vfs: Use sequence counter with associated spinlock
2020-07-29 16:14:27 +02:00
dcookies.c
…
direct-io.c
\n
2020-10-15 15:03:10 -07:00
drop_caches.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
eventfd.c
eventfd: Export eventfd_ctx_do_read()
2020-11-15 09:49:10 -05:00
eventpoll.c
ep_create_wakeup_source(): dentry name can change under you...
2020-09-24 19:41:58 -04:00
exec.c
powerpc updates for 5.10
2020-10-16 12:21:15 -07:00
fcntl.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
fhandle.c
…
file_table.c
task_work: cleanup notification modes
2020-10-17 15:05:30 -06:00
file.c
io_uring: don't rely on weak ->files references
2020-09-30 20:32:32 -06:00
filesystems.c
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
2020-04-10 15:36:22 -07:00
fs_context.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
fs_parser.c
fs_parse: mark fs_param_bad_value() as static
2020-10-13 18:38:27 -07:00
fs_pin.c
…
fs_struct.c
vfs: Use sequence counter with associated spinlock
2020-07-29 16:14:27 +02:00
fs_types.c
…
fs-writeback.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
fsopen.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
init.c
init: add an init_dup helper
2020-08-04 21:02:38 -04:00
inode.c
fs: add a filesystem flag for THPs
2020-10-16 11:11:15 -07:00
internal.h
fs: remove compat_sys_mount
2020-09-22 23:45:57 -04:00
io_uring.c
io_uring: fix link lookup racing with link timeout
2020-11-05 15:36:40 -07:00
io-wq.c
io-wq: cancel request if it's asking for files and we don't have them
2020-11-04 10:22:56 -07:00
io-wq.h
io_uring: unify fsize with def->work_flags
2020-10-20 16:03:13 -06:00
ioctl.c
fs: remove ksys_ioctl
2020-07-31 08:16:01 +02:00
Kconfig
tmpfs: support 64-bit inums per-sb
2020-08-07 11:33:24 -07:00
Kconfig.binfmt
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
kernel_read_file.c
fs/kernel_file_read: Add "offset" arg for partial reads
2020-10-05 13:37:04 +02:00
libfs.c
fs: Add standard casefolding support
2020-09-10 14:03:31 -07:00
locks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
Makefile
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
mbcache.c
…
mount.h
proc/mounts: add cursor
2020-05-14 16:44:24 +02:00
mpage.c
fs: convert mpage_readpages to mpage_readahead
2020-06-02 10:59:07 -07:00
namei.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
namespace.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
no-block.c
…
nsfs.c
nsproxy: attach to namespaces via pidfds
2020-05-13 11:41:22 +02:00
open.c
exec: move S_ISREG() check earlier
2020-08-12 10:58:01 -07:00
pipe.c
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-11 11:11:35 -07:00
pnode.c
propagate_one(): mnt_set_mountpoint() needs mount_lock
2020-04-27 10:37:14 -04:00
pnode.h
…
posix_acl.c
vfs: clean up posix_acl_permission() logic aroudn MAY_NOT_BLOCK
2020-06-08 11:04:19 -07:00
proc_namespace.c
Add a "nosymfollow" mount option.
2020-08-27 16:06:47 -04:00
read_write.c
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
readdir.c
fs: remove ksys_getdents64
2020-07-31 08:16:00 +02:00
remap_range.c
vfs: move the remap range helpers to remap_range.c
2020-10-15 09:48:49 -07:00
select.c
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
seq_file.c
seq_file: add seq_read_iter
2020-11-06 10:05:18 -08:00
signalfd.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
splice.c
io_uring-5.10-2020-10-24
2020-10-24 12:40:18 -07:00
stack.c
…
stat.c
fs: remove KSTAT_QUERY_FLAGS
2020-09-26 22:55:05 -04:00
statfs.c
Add a "nosymfollow" mount option.
2020-08-27 16:06:47 -04:00
super.c
bdi: replace BDI_CAP_STABLE_WRITES with a queue and a sb flag
2020-09-24 13:43:39 -06:00
sync.c
overlayfs update for 5.8
2020-06-09 15:40:50 -07:00
timerfd.c
…
userfaultfd.c
mm: remove the now-unnecessary mmget_still_valid() hack
2020-10-16 11:11:22 -07:00
utimes.c
fs: expose utimes_common
2020-07-31 08:16:01 +02:00
xattr.c
fs/xattr.c: fix kernel-doc warnings for setxattr & removexattr
2020-10-13 18:38:27 -07:00