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android_kernel_xiaomi_sm8450/fs
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Christoph Hellwig bd5fe6c5eb fs: kill i_alloc_sem 
i_alloc_sem is a rather special rw_semaphore.  It's the last one that may
be released by a non-owner, and it's write side is always mirrored by
real exclusion.  It's intended use it to wait for all pending direct I/O
requests to finish before starting a truncate.

Replace it with a hand-grown construct:

 - exclusion for truncates is already guaranteed by i_mutex, so it can
   simply fall way
 - the reader side is replaced by an i_dio_count member in struct inode
   that counts the number of pending direct I/O requests.  Truncate can't
   proceed as long as it's non-zero
 - when i_dio_count reaches non-zero we wake up a pending truncate using
   wake_up_bit on a new bit in i_flags
 - new references to i_dio_count can't appear while we are waiting for
   it to read zero because the direct I/O count always needs i_mutex
   (or an equivalent like XFS's i_iolock) for starting a new operation.

This scheme is much simpler, and saves the space of a spinlock_t and a
struct list_head in struct inode (typically 160 bits on a non-debug 64-bit
system).

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 20:47:46 -04:00
..
9p
no need to check for LOOKUP_OPEN in ->create() instances
2011-07-20 01:43:56 -04:00
adfs
Fix common misspellings
2011-03-31 11:26:23 -03:00
affs
affs: remove unnecessary dentry_unhash on rmdir, dir rename
2011-05-28 01:02:53 -04:00
afs
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
autofs4
autofs4: bogus dentry_unhash() added in ->unlink()
2011-05-30 01:50:53 -04:00
befs
Fix common misspellings
2011-03-31 11:26:23 -03:00
bfs
bfs: remove unnecessary dentry_unhash on dir rename
2011-05-28 01:02:50 -04:00
btrfs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
cachefiles
kill useless checks for sb->s_op == NULL
2011-07-20 01:44:21 -04:00
ceph
ceph: LOOKUP_OPEN is set only when it's the last component
2011-07-20 01:43:59 -04:00
cifs
cifs_lookup(): LOOKUP_OPEN is set only on the last component
2011-07-20 01:44:00 -04:00
coda
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
configfs
configfs: remove unnecessary dentry_unhash on rmdir, dir rename
2011-05-28 01:02:54 -04:00
cramfs
cramfs: get_cramfs_inode() returns ERR_PTR() on failure
2011-07-17 23:22:02 -04:00
debugfs
debugfs: move to new strtobool
2011-05-19 16:55:28 +09:30
devpts
fs/devpts/inode.c: correctly check d_alloc_name() return code in devpts_pty_new()
2011-03-22 17:44:17 -07:00
dlm
Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
2011-05-26 13:19:00 -07:00
ecryptfs
don't pass nameidata to vfs_create() from ecryptfs_create()
2011-07-20 01:43:54 -04:00
efs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
exofs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
exportfs
vfs: Add open by file handle support
2011-03-15 02:21:44 -04:00
ext2
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
ext3
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
ext4
ext4: Rewrite ext4_page_mkwrite() to use generic helpers
2011-07-20 20:47:45 -04:00
fat
fat: remove i_alloc_sem abuse
2011-07-20 20:47:44 -04:00
freevxfs
treewide: fix a few typos in comments
2011-05-10 10:16:21 +02:00
fscache
FS-Cache: Add a helper to bulk uncache pages on an inode
2011-07-07 13:21:56 -07:00
fuse
no need to check for LOOKUP_OPEN in ->create() instances
2011-07-20 01:43:56 -04:00
gfs2
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
hfs
hfs: remove unnecessary dentry_unhash on rmdir, dir rename
2011-05-28 01:02:52 -04:00
hfsplus
hfsplus: Fix double iput of the same inode in hfsplus_fill_super()
2011-06-30 13:38:39 +02:00
hostfs
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
hpfs
->permission() sanitizing: don't pass flags to generic_permission()
2011-07-20 01:43:22 -04:00
hppfs
hppfs_lookup(): don't open-code lookup_one_len()
2011-07-17 23:22:48 -04:00
hugetlbfs
mm: don't access vm_flags as 'int'
2011-05-26 09:20:31 -07:00
isofs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
jbd
jbd: Fix comment to match the code in journal_start()
2011-05-24 00:27:53 +02:00
jbd2
jbd2: Fix oops in jbd2_journal_remove_journal_head()
2011-06-13 15:38:22 -04:00
jffs2
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
jfs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
lockd
NLM: Don't hang forever on NLM unlock requests
2011-06-15 11:24:27 -04:00
logfs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
minix
minix: remove unnecessary dentry_unhash on rmdir, dir rename
2011-05-28 01:02:54 -04:00
ncpfs
ncpfs: fix rename over directory with dangling references
2011-05-28 01:02:53 -04:00
nfs
switch vfs_path_lookup() to struct path
2011-07-20 01:44:14 -04:00
nfs_common
Fix common misspellings
2011-03-31 11:26:23 -03:00
nfsd
nfsd4_list_rec_dir(): don't bother with reopening rec_file
2011-07-20 01:44:23 -04:00
nilfs2
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
nls
…
notify
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
ntfs
fs: kill i_alloc_sem
2011-07-20 20:47:46 -04:00
ocfs2
fs: kill i_alloc_sem
2011-07-20 20:47:46 -04:00
omfs
Remove unneeded version.h includes from fs/
2011-06-24 08:34:22 -07:00
openpromfs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
partitions
Revert "block: Remove extra discard_alignment from hd_struct."
2011-05-30 07:42:51 +02:00
proc
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
pstore
pstore: fix pstore filesystem mount/remount issue
2011-05-16 11:05:00 -07:00
qnx4
block: remove per-queue plugging
2011-03-10 08:52:07 +01:00
quota
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
ramfs
ramfs: fix memleak on no-mmu arch
2011-04-14 16:06:56 -07:00
reiserfs
fs: kill i_alloc_sem
2011-07-20 20:47:46 -04:00
romfs
romfs: fix romfs_get_unmapped_area() argument check
2011-06-27 18:00:12 -07:00
squashfs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
sysfs
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
sysv
sysv: remove unnecessary dentry_unhash from rmdir, dir rename
2011-05-28 01:02:50 -04:00
ubifs
ubifs: dereferencing an ERR_PTR in ubifs_mount()
2011-06-20 10:42:34 -04:00
udf
switch udf_ioctl() to inode_permission()
2011-07-20 01:43:07 -04:00
ufs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
xfs
xfs: make use of new shrinker callout for the inode cache
2011-07-20 20:47:42 -04:00
aio.c
Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block
2011-03-24 10:16:26 -07:00
anon_inodes.c
sanitize vfsmount refcounting changes
2011-01-16 13:47:07 -05:00
attr.c
fs: kill i_alloc_sem
2011-07-20 20:47:46 -04:00
bad_inode.c
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
binfmt_elf.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
binfmt_em86.c
…
binfmt_flat.c
CRED: Fix load_flat_shared_library() to initialise bprm correctly
2011-05-03 10:10:51 +10:00
binfmt_misc.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
binfmt_script.c
…
binfmt_som.c
…
bio-integrity.c
block: Require subsystems to explicitly allocate bio_set integrity mempool
2011-03-17 11:11:05 +01:00
bio.c
block: improve the bio_add_page() and bio_add_pc_page() descriptions
2011-05-28 14:44:46 +02:00
block_dev.c
block: use the passed in @bdev when claiming if partno is zero
2011-06-13 12:45:48 +02:00
buffer.c
vfs: Fix data corruption after failed write in __block_write_begin()
2011-06-16 11:44:46 -04:00
char_dev.c
Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block
2011-01-13 10:45:01 -08:00
compat_binfmt_elf.c
…
compat_ioctl.c
Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
2011-01-07 14:39:20 -08:00
compat.c
exec: unify do_execve/compat_do_execve code
2011-04-09 15:53:56 +02:00
dcache.c
superblock: introduce per-sb cache shrinker infrastructure
2011-07-20 20:47:10 -04:00
dcookies.c
oprofile, dcookies: Fix possible circular locking dependency
2011-05-31 16:33:35 +02:00
direct-io.c
fs: kill i_alloc_sem
2011-07-20 20:47:46 -04:00
drop_caches.c
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
eventfd.c
Docbook: add fs/eventfd.c and fix typos in it
2011-02-21 15:07:04 -08:00
eventpoll.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
exec.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
fcntl.c
userns: rename is_owner_or_cap to inode_owner_or_capable
2011-03-23 19:47:13 -07:00
fhandle.c
fs/fhandle.c: add <linux/personality.h> for ia64
2011-04-14 16:06:56 -07:00
fifo.c
Filesystem: fifo: Fixed coding style issue.
2011-03-21 00:16:09 -04:00
file_table.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-03-16 13:26:17 -07:00
file.c
vfs: avoid large kmalloc()s for the fdtable
2011-04-28 11:28:20 -07:00
filesystems.c
fs: synchronize_rcu when unregister_filesystem success not failure
2011-04-17 10:42:01 -07:00
fs_struct.c
sanitize vfsmount refcounting changes
2011-01-16 13:47:07 -05:00
fs-writeback.c
superblock: move pin_sb_for_writeback() to fs/super.c
2011-07-20 01:44:38 -04:00
generic_acl.c
->permission() sanitizing: don't pass flags to ->check_acl()
2011-07-20 01:43:21 -04:00
inode.c
fs: kill i_alloc_sem
2011-07-20 20:47:46 -04:00
internal.h
superblock: move pin_sb_for_writeback() to fs/super.c
2011-07-20 01:44:38 -04:00
ioctl.c
vfs: cleanup do_vfs_ioctl()
2011-03-21 00:16:08 -04:00
ioprio.c
ioprio: grab rcu_read_lock in sys_ioprio_{set,get}()
2010-11-15 10:23:31 +01:00
Kconfig
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-05-26 09:52:14 -07:00
Kconfig.binfmt
…
libfs.c
Make ->d_sb assign-once and always non-NULL
2011-07-20 01:44:17 -04:00
locks.c
fs: fix lock initialization
2011-07-06 10:41:13 -07:00
Makefile
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
2011-03-16 19:01:29 -07:00
mbcache.c
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
mpage.c
mm/fs: add hooks to support cleancache
2011-05-26 10:01:43 -06:00
namei.c
VFS: Fixup kerneldoc for generic_permission()
2011-07-20 20:47:43 -04:00
namespace.c
fs/namespace.c: bound mount propagation fix
2011-05-26 07:26:44 -04:00
nfsctl.c
open-style analog of vfs_path_lookup()
2011-03-14 09:15:28 -04:00
no-block.c
…
open.c
fs: Use BUG_ON(!mnt) at dentry_open().
2011-03-21 01:10:41 -04:00
pipe.c
Fix broken "pipe: use event aware wakeups" optimization
2011-01-20 16:21:59 -08:00
pnode.c
fs: scale mntget/mntput
2011-01-07 17:50:33 +11:00
pnode.h
…
posix_acl.c
NFS: Prevent memory allocation failure in nfsacl_encode()
2011-01-25 15:24:47 -05:00
read_write.c
fix signedness mess in rw_verify_area() on 64bit architectures
2011-01-12 20:06:58 -05:00
read_write.h
…
readdir.c
…
select.c
select: remove unused MAX_SELECT_SECONDS
2011-03-21 00:16:08 -04:00
seq_file.c
…
signalfd.c
…
splice.c
splice: add wakeup_pipe_readers()
2011-05-23 19:58:53 +02:00
stack.c
…
stat.c
readlinkat(), fchownat() and fstatat() with empty relative pathnames
2011-03-15 02:21:45 -04:00
statfs.c
clean statfs-like syscalls up
2011-03-14 09:15:28 -04:00
super.c
vfs: increase shrinker batch size
2011-07-20 20:47:41 -04:00
sync.c
Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block
2011-03-24 10:16:26 -07:00
timerfd.c
timerfd: Fix wakeup of processes when timer is cancelled on clock change
2011-06-14 11:46:14 +02:00
utimes.c
userns: rename is_owner_or_cap to inode_owner_or_capable
2011-03-23 19:47:13 -07:00
xattr_acl.c
…
xattr.c
Cache xattr security drop check for write v2
2011-05-28 12:02:09 -04:00