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Joel Becker 58896c4d0e ocfs2: One more hamming code optimization. 
The previous optimization used a fast find-highest-bit-set operation to
give us a good starting point in calc_code_bit().  This version lets the
caller cache the previous code buffer bit offset.  Thus, the next call
always starts where the last one left off.

This reduces the calculation another 39%, for a total 80% reduction from
the original, naive implementation.  At least, on my machine.  This also
brings the parity calculation to within an order of magnitude of the
crc32 calculation.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:35 -08:00
..
9p
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
adfs
vfs: Use const for kernel parser table
2008-10-13 10:10:37 -07:00
affs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
afs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
autofs
CRED: Wrap task credential accesses in the autofs filesystem
2008-11-14 10:38:45 +11:00
autofs4
Merge branch 'master' into next
2008-11-14 11:29:12 +11:00
befs
befs: ensure fast symlinks are NUL-terminated
2008-12-31 18:07:40 -05:00
bfs
CRED: Wrap task credential accesses in the BFS filesystem
2008-11-14 10:38:47 +11:00
cifs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
coda
coda: fix creds reference
2008-11-20 08:11:52 +11:00
configfs
[PATCH] assorted path_lookup() -> kern_path() conversions
2008-10-23 05:12:52 -04:00
cramfs
…
debugfs
integrity: special fs magic
2008-10-13 09:47:43 +11:00
devpts
CRED: Wrap task credential accesses in the devpts filesystem
2009-01-02 10:19:38 -08:00
dlm
fix warning in fs/dlm/netlink.c
2008-11-25 16:51:45 -08:00
ecryptfs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
efs
[PATCH] switch all filesystems over to d_obtain_alias
2008-10-23 05:13:01 -04:00
exportfs
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
ext2
nfsd race fixes: ext2
2008-12-31 18:07:43 -05:00
ext3
ext3: Add default allocation routines for quota structures
2009-01-05 08:40:25 -08:00
ext4
ext4: Add default allocation routines for quota structures
2009-01-05 08:40:26 -08:00
fat
Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6
2008-12-30 20:33:34 -08:00
freevxfs
freevxfs: ensure fast symlinks are NUL-terminated
2008-12-31 18:07:40 -05:00
fuse
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
gfs2
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
hfs
CRED: Wrap task credential accesses in the HFS filesystem
2008-11-14 10:38:54 +11:00
hfsplus
CRED: Wrap task credential accesses in the HFSplus filesystem
2008-11-14 10:38:54 +11:00
hostfs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
hpfs
CRED: Wrap task credential accesses in the HPFS filesystem
2008-11-14 10:38:55 +11:00
hppfs
CRED: Use creds in file structs
2008-11-14 10:39:25 +11:00
hugetlbfs
CRED: Wrap current->cred and a few other accessors
2008-11-14 10:39:18 +11:00
isofs
[PATCH] switch all filesystems over to d_obtain_alias
2008-10-23 05:13:01 -04:00
jbd
jbd: don't give up looking for space so easily in __log_wait_for_space
2008-11-06 22:37:59 -05:00
jbd2
jbd2: Add buffer triggers
2009-01-05 08:40:30 -08:00
jffs2
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
jfs
nfsd race fixes: jfs
2008-12-31 18:07:44 -05:00
lockd
Merge branch 'devel' into next
2008-12-30 16:51:43 -05:00
minix
CRED: Wrap task credential accesses in the Minix filesystem
2008-11-14 10:38:57 +11:00
ncpfs
CRED: Wrap task credential accesses in the NCPFS filesystem
2008-11-14 10:38:58 +11:00
nfs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
nfs_common
SUNRPC: nfsacl_encode/nfsacl_decode should be exported as GPL-only
2008-12-23 15:21:32 -05:00
nfsd
Merge branch 'devel' into next
2008-12-30 16:51:43 -05:00
nls
remove CONFIG_KMOD from fs
2008-10-17 02:38:36 +11:00
notify
filesystem notification: create fs/notify to contain all fs notification
2008-12-31 18:07:43 -05:00
ntfs
ntfs: don't fool kernel-doc
2008-12-01 19:55:25 -08:00
ocfs2
ocfs2: One more hamming code optimization.
2009-01-05 08:40:35 -08:00
omfs
CRED: Wrap task credential accesses in the OMFS filesystem
2008-11-14 10:38:59 +11:00
openpromfs
[PATCH] fix ->llseek for more directories
2008-10-23 05:13:21 -04:00
partitions
block/md: fix md autodetection
2008-11-18 15:08:56 +01:00
proc
Merge branch 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-31 09:00:59 -08:00
qnx4
…
ramfs
CRED: Wrap task credential accesses in the RAMFS filesystem
2008-11-14 10:39:00 +11:00
reiserfs
reiserfs: Add default allocation routines for quota structures
2009-01-05 08:40:25 -08:00
romfs
…
smbfs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
sysfs
[PATCH] fix ->llseek for more directories
2008-10-23 05:13:21 -04:00
sysv
sysv: ensure fast symlinks are NUL-terminated
2008-12-31 18:07:39 -05:00
ubifs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
udf
Merge branch 'master' into next
2008-12-04 17:16:36 +11:00
ufs
CRED: Wrap task credential accesses in the UFS filesystem
2008-11-14 10:39:04 +11:00
xfs
[XFS] Fix merge failures
2008-12-29 16:47:18 +11:00
aio.c
aio: make the lookup_ioctx() lockless
2008-12-29 08:29:50 +01:00
anon_inodes.c
anon_inodes: use fops->owner for module refcount
2008-12-31 16:55:44 +02:00
attr.c
CRED: Wrap task credential accesses in the filesystem subsystem
2008-11-14 10:39:05 +11:00
bad_inode.c
kill ->dir_notify()
2008-12-31 18:07:43 -05:00
binfmt_aout.c
sanitize ifdefs in binfmt_aout
2009-01-03 11:45:54 -08:00
binfmt_elf_fdpic.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
binfmt_elf.c
Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
2008-12-28 12:33:21 -08:00
binfmt_em86.c
Allow recursion in binfmt_script and binfmt_misc
2008-10-16 11:21:38 -07:00
binfmt_flat.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
binfmt_misc.c
Allow recursion in binfmt_script and binfmt_misc
2008-10-16 11:21:38 -07:00
binfmt_script.c
Allow recursion in binfmt_script and binfmt_misc
2008-10-16 11:21:38 -07:00
binfmt_som.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
bio-integrity.c
bio: allow individual slabs in the bio_set
2008-12-29 08:29:23 +01:00
bio.c
bio: get rid of bio_vec clearing
2008-12-29 08:29:53 +01:00
block_dev.c
fs/block_dev.c: __read_mostly improvement and sb_is_blkdev_sb utilization
2008-12-31 18:07:43 -05:00
buffer.c
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
char_dev.c
[PATCH] tidy up chrdev_open
2008-10-23 05:12:59 -04:00
compat_binfmt_elf.c
…
compat_ioctl.c
…
compat.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
dcache.c
filp_cachep can be static in fs/file_table.c
2008-12-31 18:07:42 -05:00
dcookies.c
shrink struct dentry
2008-12-31 18:07:38 -05:00
direct-io.c
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
dquot.c
quota: Export dquot_alloc() and dquot_destroy() functions
2009-01-05 08:40:25 -08:00
drop_caches.c
…
eventfd.c
…
eventpoll.c
epoll: introduce resource usage limits
2008-12-01 19:55:24 -08:00
exec.c
get rid of special-casing the /sbin/loader on alpha
2009-01-03 11:45:54 -08:00
fcntl.c
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
fifo.c
[PATCH] introduce fmode_t, do annotations
2008-10-21 07:47:06 -04:00
file_table.c
filp_cachep can be static in fs/file_table.c
2008-12-31 18:07:42 -05:00
file.c
…
filesystems.c
proc: move /proc/filesystems to fs/filesystems.c
2008-10-23 14:27:09 +04:00
fs-writeback.c
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
generic_acl.c
…
inode.c
nfsd/create race fixes, infrastructure
2008-12-31 18:07:43 -05:00
internal.h
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
ioctl.c
Fix a race condition in FASYNC handling
2008-12-05 15:35:10 -08:00
ioprio.c
CRED: Use RCU to access another task's creds and to release a task's own creds
2008-11-14 10:39:19 +11:00
Kconfig
ocfs2: Assign feature bits and system inodes to quota feature and quota files
2009-01-05 08:40:23 -08:00
Kconfig.binfmt
add CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
2008-10-20 08:52:39 -07:00
libfs.c
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
locks.c
CRED: Wrap task credential accesses in the filesystem subsystem
2008-11-14 10:39:05 +11:00
Makefile
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
mbcache.c
…
mpage.c
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
namei.c
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
namespace.c
fs/namespace.c: drop code after return
2008-12-31 18:07:38 -05:00
nfsctl.c
pass a struct path * to may_open
2008-12-31 18:07:41 -05:00
no-block.c
…
open.c
introduce new LSM hooks where vfsmount is available.
2008-12-31 18:07:37 -05:00
pipe.c
sanitize audit_fd_pair()
2009-01-04 15:14:41 -05:00
pnode.c
…
pnode.h
…
posix_acl.c
CRED: Wrap task credential accesses in the filesystem subsystem
2008-11-14 10:39:05 +11:00
quota_tree.c
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
quota_tree.h
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
quota_v1.c
quota: Move quotaio_v[12].h from include/linux/ to fs/
2009-01-05 08:36:58 -08:00
quota_v2.c
quota: Convert union in mem_dqinfo to a pointer
2009-01-05 08:40:21 -08:00
quota.c
quota: Introduce DQUOT_QUOTA_SYS_FILE flag
2009-01-05 08:36:57 -08:00
quotaio_v1.h
quota: Move quotaio_v[12].h from include/linux/ to fs/
2009-01-05 08:36:58 -08:00
quotaio_v2.h
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
read_write.c
[PATCH] generic_file_llseek tidyups
2008-10-23 05:12:59 -04:00
read_write.h
…
readdir.c
[PATCH] prepare vfs_readdir() callers to returning filldir result
2008-10-23 05:13:10 -04:00
select.c
select: deal with math overflow from borderline valid userland data
2008-10-26 11:22:08 -07:00
seq_file.c
Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-03 12:04:39 -08:00
signalfd.c
…
splice.c
fs: remove prepare_write/commit_write
2008-10-30 11:38:45 -07:00
stack.c
…
stat.c
…
super.c
security: pass mount flags to security_sb_kern_mount()
2008-12-20 09:02:39 +11:00
sync.c
…
timerfd.c
…
utimes.c
…
xattr_acl.c
…
xattr.c
…