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

* '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

1 files changed, 26 insertions, 0 deletions

diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index c96c1858fe2c..1ba3cf6edfbb 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -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.