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Akinobu Mita 6017b485ca ext4: use memweight() 
Convert ext4_count_free() to use memweight() instead of table lookup
based counting clear bits implementation.  This change only affects the
code segments enabled by EXT4FS_DEBUG.

Note that this memweight() call can't be replaced with a single
bitmap_weight() call, although the pointer to the memory area is aligned
to long-word boundary.  Because the size of the memory area may not be a
multiple of BITS_PER_LONG, then it returns wrong value on big-endian
architecture.

This also includes the following change.

- Remove unnecessary map == NULL check in ext4_count_free() which
  always takes non-null pointer as the memory area.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-30 17:25:16 -07:00
..
9p
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
adfs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
affs
affs: use memweight()
2012-07-30 17:25:16 -07:00
afs
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
autofs4
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
befs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
bfs
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
btrfs
btrfs: use printk_get_level and printk_skip_level, add __printf, fix fallout
2012-07-30 17:25:14 -07:00
cachefiles
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
ceph
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
cifs
cifs: ensure that we always do cifsFileInfo_get under the spinlock
2012-07-25 14:51:30 -05:00
coda
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
configfs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
cramfs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
debugfs
Driver core merge for 3.6-rc1
2012-07-26 11:25:33 -07:00
devpts
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
dlm
dlm: fix missing dir remove
2012-07-16 14:24:43 -05:00
ecryptfs
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
efs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
exofs
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-07-23 12:27:27 -07:00
exportfs
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
ext2
ext2: use memweight()
2012-07-30 17:25:16 -07:00
ext3
ext3: use memweight()
2012-07-30 17:25:16 -07:00
ext4
ext4: use memweight()
2012-07-30 17:25:16 -07:00
fat
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
freevxfs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
fscache
…
fuse
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
gfs2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw
2012-07-24 17:57:05 -07:00
hfs
hfs: get rid of hfs_sync_super
2012-07-22 23:58:09 +04:00
hfsplus
hfsplus: get rid of write_super
2012-07-22 23:58:04 +04:00
hostfs
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
hpfs
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
hppfs
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
hugetlbfs
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
isofs
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2012-07-24 17:40:44 -07:00
jbd
jbd: Check return value of blkdev_issue_flush()
2012-07-09 23:38:36 +02:00
jbd2
jbd2: remove the second argument of kmap_atomic
2012-07-23 14:11:22 +08:00
jffs2
don't expose I_NEW inodes via dentry->d_inode
2012-07-23 00:00:58 +04:00
jfs
don't expose I_NEW inodes via dentry->d_inode
2012-07-23 00:00:58 +04:00
lockd
Merge branch 'for-3.5' of git://linux-nfs.org/~bfields/linux
2012-06-01 08:32:58 -07:00
logfs
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
minix
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
ncpfs
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
nfs
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-07-23 12:27:27 -07:00
nfs_common
…
nfsd
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
nilfs2
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
nls
nls: fix (and rename) mac NLS table files and config options
2012-06-01 19:51:22 -07:00
notify
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
ntfs
ntfs: remove references to long gone super operations and unimplemented methods
2012-07-30 17:25:11 -07:00
ocfs2
ocfs2: use memweight()
2012-07-30 17:25:16 -07:00
omfs
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
openpromfs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
proc
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2012-07-23 18:54:23 -07:00
pstore
pstore/ram: Make tracing log versioned
2012-07-17 16:48:09 -07:00
qnx4
qnx4fs: use memweight()
2012-07-30 17:25:16 -07:00
qnx6
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
quota
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2012-07-24 17:40:44 -07:00
ramfs
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
reiserfs
don't expose I_NEW inodes via dentry->d_inode
2012-07-23 00:00:58 +04:00
romfs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
squashfs
stop passing nameidata to ->lookup()
2012-07-14 16:34:32 +04:00
sysfs
Driver core merge for 3.6-rc1
2012-07-26 11:25:33 -07:00
sysv
fs/sysv: stop using write_super and s_dirt
2012-07-22 23:58:12 +04:00
ubifs
* Added another debugfs knob for forcing UBIFS R/O mode without flushing caches
2012-07-23 15:50:52 -07:00
udf
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2012-07-24 17:40:44 -07:00
ufs
fs/ufs: get rid of write_super
2012-07-22 23:58:16 +04:00
xfs
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-07-23 12:27:27 -07:00
aio.c
aio: now fput() is OK from interrupt context; get rid of manual delayed __fput()
2012-07-22 23:57:59 +04:00
anon_inodes.c
…
attr.c
notify_change(): check that i_mutex is held
2012-07-14 16:35:42 +04:00
bad_inode.c
don't pass nameidata to ->create()
2012-07-14 16:34:47 +04:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-05-23 17:42:39 -07:00
binfmt_elf.c
binfmt_elf: switch elf_map() to vm_mmap/vm_munmap
2012-05-30 21:04:55 -04:00
binfmt_em86.c
…
binfmt_flat.c
binfmt_flat: use vm_munmap, we are missing ->mmap_sem there
2012-05-30 21:04:56 -04:00
binfmt_misc.c
…
binfmt_script.c
…
binfmt_som.c
…
bio-integrity.c
…
bio.c
Merge branch 'for-3.5/core' of git://git.kernel.dk/linux-block
2012-05-30 08:52:42 -07:00
block_dev.c
vfs: Create function for iterating over block devices
2012-07-22 23:58:45 +04:00
buffer.c
block: fix infinite loop in __getblk_slow
2012-07-13 08:36:35 -07:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
…
compat.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2012-06-01 11:53:44 -07:00
dcache.c
__d_unalias() should refuse to move mountpoints
2012-07-14 16:35:15 +04:00
dcookies.c
…
direct-io.c
fs/direct-io.c: adjust suspicious bit operation
2012-07-14 16:32:46 +04:00
drop_caches.c
…
eventfd.c
eventfd: change int to __u64 in eventfd_signal()
2012-05-31 17:49:32 -07:00
eventpoll.c
PM: Rename CAP_EPOLLWAKEUP to CAP_BLOCK_SUSPEND
2012-07-17 21:37:27 +02:00
exec.c
coredump: warn about unsafe suid_dumpable / core_pattern combo
2012-07-30 17:25:11 -07:00
fcntl.c
switch fcntl to fget_raw_light/fput_light
2012-05-29 23:28:30 -04:00
fhandle.c
…
fifo.c
fifo: Do not restart open() if it already found a partner
2012-07-16 08:33:14 -07:00
file_table.c
switch fput to task_work_add
2012-07-22 23:57:58 +04:00
file.c
…
filesystems.c
…
fs_struct.c
get rid of ->mnt_longterm
2012-07-14 16:32:47 +04:00
fs-writeback.c
vfs: Move noop_backing_dev_info check from sync into writeback
2012-07-22 23:58:18 +04:00
generic_acl.c
…
inode.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2012-07-26 14:48:55 -07:00
internal.h
VFS: Split inode_permission()
2012-07-14 16:38:36 +04:00
ioctl.c
…
ioprio.c
Merge branch 'for-3.5/core' of git://git.kernel.dk/linux-block
2012-05-30 08:52:42 -07:00
Kconfig
…
Kconfig.binfmt
C6X: add support to build with BINFMT_ELF_FDPIC
2012-05-15 09:17:34 -04:00
libfs.c
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
locks.c
locks: fix checking of fcntl_setlease argument
2012-07-23 12:46:01 -07:00
Makefile
…
mbcache.c
…
mount.h
get rid of magic in proc_namespace.c
2012-07-14 16:32:48 +04:00
mpage.c
…
namei.c
tidy up namei.c a bit
2012-07-23 00:00:55 +04:00
namespace.c
VFS: Comment mount following code
2012-07-14 16:38:32 +04:00
no-block.c
…
open.c
switch dentry_open() to struct path, make it grab references itself
2012-07-23 00:01:29 +04:00
pipe.c
pipe: remove KM_USER0 from comments
2012-07-24 15:27:34 +08:00
pnode.c
VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors
2012-07-14 16:37:27 +04:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
get rid of magic in proc_namespace.c
2012-07-14 16:32:48 +04:00
read_write.c
vfs: allow custom EOF in generic_file_llseek code
2012-07-23 00:00:15 +04:00
read_write.h
…
readdir.c
switch readdir/getdents to fget_light/fput_light
2012-05-29 23:28:29 -04:00
select.c
posix_types.h: Cleanup stale __NFDBITS and related definitions
2012-07-26 13:36:43 -07:00
seq_file.c
seq_file: Add seq_vprintf function and export it
2012-06-11 13:16:35 +01:00
signalfd.c
switch signalfd4() to fget_light/fput_light
2012-05-29 23:28:30 -04:00
splice.c
splice: fix racy pipe->buffers uses
2012-06-13 21:16:42 +02:00
stack.c
…
stat.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-05-23 17:42:39 -07:00
statfs.c
switch statfs to fget_light/fput_light
2012-05-29 23:28:31 -04:00
super.c
VFS: Pass mount flags to sget()
2012-07-14 16:38:34 +04:00
sync.c
vfs: Avoid unnecessary WB_SYNC_NONE writeback during sys_sync and reorder sync passes
2012-07-22 23:59:01 +04:00
timerfd.c
…
utimes.c
switch utimes() to fget_light/fput_light
2012-05-29 23:28:32 -04:00
xattr_acl.c
…
xattr.c
fs/xattr.c:getxattr(): improve handling of allocation failures
2012-07-30 17:25:11 -07:00