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87533c4751
kernel_optimize_test/fs
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Miao Xie 87533c4751 Btrfs: use bit operation for ->fs_state 
There is no lock to protect fs_info->fs_state, it will introduce
some problems, such as the value may be covered by the other task
when several tasks modify it. For example:
	Task0 - CPU0		Task1 - CPU1
	mov %fs_state rax
	or $0x1 rax
				mov %fs_state rax
				or $0x2 rax
	mov rax %fs_state
				mov rax %fs_state
The expected value is 3, but in fact, it is 2.

Though this problem doesn't happen now (because there is only one
flag currently), the code is error prone, if we add other flags,
the above problem will happen to a certainty.

Now we use bit operation for it to fix the above problem.
In this way, we can make the code more robust and be easy to
add new flags.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-20 12:59:09 -05:00
..
9p The following changes since commit 4cbe5a555f: 2012-10-12 09:59:23 +09:00
adfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
affs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
afs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
autofs4 autofs4 - fix reset pending flag on mount fail 2012-10-11 10:21:16 +09:00
befs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
bfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
btrfs Btrfs: use bit operation for ->fs_state 2013-02-20 12:59:09 -05:00
cachefiles
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2012-10-29 08:49:25 -07:00
cifs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-12-01 13:29:55 -08:00
coda fs: push rcu_barrier() from deactivate_locked_super() to filesystems 2012-10-02 21:35:55 -04:00
configfs
cramfs
debugfs
devpts
dlm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
ecryptfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
efs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
exofs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-12 10:52:03 +09:00
exportfs
ext2 ext2: fix return values on parse_options() failure 2012-10-09 23:23:53 +02:00
ext3 ext3: Avoid underflow of in ext3_trim_fs() 2012-11-19 21:36:12 +01:00
ext4 ext4: fix unjournaled inode bitmap modification 2012-10-28 22:24:57 -04:00
fat fat: drop lock/unlock super 2012-10-09 23:33:38 -04:00
freevxfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
fscache
fuse mm: kill vma flag VM_CAN_NONLINEAR 2012-10-09 16:22:17 +09:00
gfs2 GFS2: Test bufdata with buffer locked and gfs2_log_lock held 2012-11-07 09:43:03 +00:00
hfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
hfsplus Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
hostfs Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 2012-10-10 11:15:20 +09:00
hpfs hpfs: drop lock/unlock super 2012-10-09 23:33:38 -04:00
hppfs hppfs: fix the return value of get_inode() 2012-10-09 22:34:52 +02:00
hugetlbfs mm: replace vma prio_tree with an interval tree 2012-10-09 16:22:39 +09:00
isofs tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking 2012-10-09 23:33:55 -04:00
jbd jbd: Fix lock ordering bug in journal_unmap_buffer() 2012-11-23 15:17:18 +01:00
jbd2 The big new feature added this time is supporting online resizing 2012-10-08 06:36:39 +09:00
jffs2 jffs2: Fix lock acquisition order bug in jffs2_write_begin 2012-11-09 17:02:50 +02:00
jfs jfs: Fix FITRIM argument handling 2012-10-17 09:18:38 -05:00
lockd LOCKD: Clear ln->nsm_clnt only when ln->nsm_users is zero 2012-10-24 10:46:22 -04:00
logfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
minix Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
ncpfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
nfs nfs_lookup_revalidate(): fix a leak 2012-11-29 22:04:36 -05:00
nfs_common
nfsd UAPI Disintegration 2012-10-09 2012-10-09 18:35:22 -04:00
nilfs2 mm: kill vma flag VM_CAN_NONLINEAR 2012-10-09 16:22:17 +09:00
nls
notify fanotify: fix FAN_Q_OVERFLOW case of fanotify_read() 2012-11-18 09:30:00 -10:00
ntfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
ocfs2 mm: kill vma flag VM_CAN_NONLINEAR 2012-10-09 16:22:17 +09:00
omfs omfs: convert to use beXX_add_cpu() 2012-10-06 03:05:31 +09:00
openpromfs fs: push rcu_barrier() from deactivate_locked_super() to filesystems 2012-10-02 21:35:55 -04:00
proc proc: check vma->vm_file before dereferencing 2012-11-26 17:41:24 -08:00
pstore pstore: Fix NULL pointer dereference in console writes 2012-11-14 18:30:21 -08:00
qnx4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
qnx6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
quota Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-10-16 18:12:38 -07:00
ramfs
reiserfs reiserfs: Move quota calls out of write lock 2012-11-19 21:34:33 +01:00
romfs fs: push rcu_barrier() from deactivate_locked_super() to filesystems 2012-10-02 21:35:55 -04:00
squashfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
sysfs sysfs: sysfs_pathname/sysfs_add_one: Use strlcat() instead of strcat() 2012-10-24 15:57:14 -07:00
sysv sysv: drop lock/unlock super 2012-10-09 23:33:39 -04:00
ubifs UBIFS: fix mounting problems after power cuts 2012-10-26 16:26:44 +03:00
udf Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-10-04 09:14:01 -07:00
ufs ufs: drop lock/unlock super 2012-10-09 23:33:39 -04:00
xfs xfs: drop buffer io reference when a bad bio is built 2012-11-17 09:36:57 -06:00
aio.c
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c coredump: pass siginfo_t* to do_coredump() and below, not merely signr 2012-10-06 03:05:16 +09:00
binfmt_elf_fdpic.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-10-10 12:02:25 +09:00
binfmt_elf.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-10-10 12:02:25 +09:00
binfmt_em86.c
binfmt_flat.c coredump: pass siginfo_t* to do_coredump() and below, not merely signr 2012-10-06 03:05:16 +09:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio-integrity.c
bio.c vfs: fix: don't increase bio_slab_max if krealloc() fails 2012-10-22 22:00:26 +02:00
block_dev.c vfs: fix O_DIRECT read past end of block device 2012-12-08 08:28:26 -08:00
buffer.c vfs: clear to the end of the buffer on partial buffer reads 2012-12-05 10:32:59 -08:00
char_dev.c char_dev: pin parent kobject 2012-10-22 08:50:37 +03:00
compat_binfmt_elf.c coredump: extend core dump note section to contain file names of mapped files 2012-10-06 03:05:17 +09:00
compat_ioctl.c fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check 2012-10-25 14:37:53 -07:00
compat.c vfs: define struct filename and have getname() return it 2012-10-12 20:14:55 -04:00
coredump.c fix a leak in replace_fd() users 2012-10-16 13:36:50 -04:00
coredump.h coredump: update coredump-related headers 2012-10-06 03:05:15 +09:00
dcache.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
dcookies.c
direct-io.c direct-io: don't read inode->i_blkbits multiple times 2012-11-29 12:38:44 -08:00
drop_caches.c
eventfd.c
eventpoll.c revert "epoll: support for disabling items, and a self-test app" 2012-11-09 06:41:46 +01:00
exec.c freezer: exec should clear PF_NOFREEZE along with PF_KTHREAD 2012-10-25 22:28:12 +02:00
fcntl.c Fix F_DUPFD_CLOEXEC breakage 2012-10-09 15:52:31 +09:00
fhandle.c
fifo.c
file_table.c lglock: add DEFINE_STATIC_LGLOCK() 2012-10-10 01:15:44 -04:00
file.c fix off-by-one in argument passed by iterate_fd() to callbacks 2012-11-29 23:01:30 -05:00
filesystems.c vfs: define struct filename and have getname() return it 2012-10-12 20:14:55 -04:00
fs_struct.c
fs-writeback.c writeback: put unused inodes to LRU after writeback completion 2012-11-26 17:41:24 -08:00
generic_acl.c
inode.c writeback: put unused inodes to LRU after writeback completion 2012-11-26 17:41:24 -08:00
internal.h writeback: put unused inodes to LRU after writeback completion 2012-11-26 17:41:24 -08:00
ioctl.c
ioprio.c
Kconfig
Kconfig.binfmt coredump: make core dump functionality optional 2012-10-06 03:05:15 +09:00
libfs.c
locks.c UAPI Disintegration 2012-10-09 2012-10-09 18:35:22 -04:00
Makefile coredump: make core dump functionality optional 2012-10-06 03:05:15 +09:00
mbcache.c
mount.h
mpage.c
namei.c lookup_one_len: don't accept . and .. 2012-11-29 22:17:21 -05:00
namespace.c vfs: define struct filename and have getname() return it 2012-10-12 20:14:55 -04:00
no-block.c
open.c vfs: make path_openat take a struct filename pointer 2012-10-12 20:15:09 -04:00
pipe.c
pnode.c
pnode.h
posix_acl.c
proc_namespace.c
read_write.c compat: fs: Generic compat_sys_sendfile implementation 2012-10-02 21:35:55 -04:00
read_write.h compat: fs: Generic compat_sys_sendfile implementation 2012-10-02 21:35:55 -04:00
readdir.c
select.c
seq_file.c
signalfd.c
splice.c
stack.c
stat.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
statfs.c
super.c vfs: drop lock/unlock super 2012-10-09 23:33:39 -04:00
sync.c
timerfd.c
utimes.c
xattr_acl.c userns: Fix posix_acl_file_xattr_userns gid conversion 2012-10-12 13:16:48 -07:00
xattr.c fs, xattr: fix bug when removing a name not in xattr list 2012-10-18 12:35:58 -07:00