GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 07:12:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge branch 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing

Browse source 
* 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:
  reiserfs: Safely acquire i_mutex from xattr_rmdir
  reiserfs: Safely acquire i_mutex from reiserfs_for_each_xattr
  reiserfs: Fix journal mutex <-> inode mutex lock inversion
  reiserfs: Fix unwanted recursive reiserfs lock in reiserfs_unlink()
  reiserfs: Relax lock before open xattr dir in reiserfs_xattr_set_handle()
  reiserfs: Relax reiserfs lock while freeing the journal
  reiserfs: Fix reiserfs lock <-> i_mutex dependency inversion on xattr
  reiserfs: Warn on lock relax if taken recursively
  reiserfs: Fix reiserfs lock <-> i_xattr_sem dependency inversion
  reiserfs: Fix remaining in-reclaim-fs <-> reclaim-fs-on locking inversion
  reiserfs: Fix reiserfs lock <-> inode mutex dependency inversion
  reiserfs: Fix reiserfs lock and journal lock inversion dependency
  reiserfs: Fix possible recursive lock
This commit is contained in:
Linus Torvalds 2010-01-02 11:17:05 -08:00
commit 45d28b0972
7 changed files with 79 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

26
include/linux/reiserfs_fs.h
View file

@ -62,6 +62,12 @@ void reiserfs_write_unlock(struct super_block *s);
int reiserfs_write_lock_once(struct super_block *s);
void reiserfs_write_unlock_once(struct super_block *s, int lock_depth);
#ifdef CONFIG_REISERFS_CHECK
void reiserfs_lock_check_recursive(struct super_block *s);
#else
static inline void reiserfs_lock_check_recursive(struct super_block *s) { }
#endif
/*
* Several mutexes depend on the write lock.
* However sometimes we want to relax the write lock while we hold
@ -92,11 +98,31 @@ void reiserfs_write_unlock_once(struct super_block *s, int lock_depth);
static inline void reiserfs_mutex_lock_safe(struct mutex *m,
struct super_block *s)
{
reiserfs_lock_check_recursive(s);
reiserfs_write_unlock(s);
mutex_lock(m);
reiserfs_write_lock(s);
}
static inline void
reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass,
struct super_block *s)
{
reiserfs_lock_check_recursive(s);
reiserfs_write_unlock(s);
mutex_lock_nested(m, subclass);
reiserfs_write_lock(s);
}
static inline void
reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s)
{
reiserfs_lock_check_recursive(s);
reiserfs_write_unlock(s);
down_read(sem);
reiserfs_write_lock(s);
}
/*
* When we schedule, we usually want to also release the write lock,
* according to the previous bkl based locking scheme of reiserfs.