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[PATCH] lockdep: annotate i_mutex

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Teach special (recursive) locking code to the lock validator.  Has no effect
on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar
2006-07-03 00:25:05 -07:00
committed by Linus Torvalds
parent a90b9c05df
commit f2eace23e9
3 changed files with 30 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/namei.c
+10 -10
View File
@@ -1423,7 +1423,7 @@ struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)
struct dentry *p;
if (p1 == p2) {
mutex_lock(&p1->d_inode->i_mutex);
mutex_lock_nested(&p1->d_inode->i_mutex, I_MUTEX_PARENT);
return NULL;
}
@@ -1431,22 +1431,22 @@ struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)
for (p = p1; p->d_parent != p; p = p->d_parent) {
if (p->d_parent == p2) {
mutex_lock(&p2->d_inode->i_mutex);
mutex_lock(&p1->d_inode->i_mutex);
mutex_lock_nested(&p2->d_inode->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&p1->d_inode->i_mutex, I_MUTEX_CHILD);
return p;
}
}
for (p = p2; p->d_parent != p; p = p->d_parent) {
if (p->d_parent == p1) {
mutex_lock(&p1->d_inode->i_mutex);
mutex_lock(&p2->d_inode->i_mutex);
mutex_lock_nested(&p1->d_inode->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&p2->d_inode->i_mutex, I_MUTEX_CHILD);
return p;
}
}
mutex_lock(&p1->d_inode->i_mutex);
mutex_lock(&p2->d_inode->i_mutex);
mutex_lock_nested(&p1->d_inode->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&p2->d_inode->i_mutex, I_MUTEX_CHILD);
return NULL;
}
@@ -1751,7 +1751,7 @@ struct dentry *lookup_create(struct nameidata *nd, int is_dir)
{
struct dentry *dentry = ERR_PTR(-EEXIST);
mutex_lock(&nd->dentry->d_inode->i_mutex);
mutex_lock_nested(&nd->dentry->d_inode->i_mutex, I_MUTEX_PARENT);
/*
* Yucky last component or no last component at all?
* (foo/., foo/.., /////)
@@ -2008,7 +2008,7 @@ static long do_rmdir(int dfd, const char __user *pathname)
error = -EBUSY;
goto exit1;
}
mutex_lock(&nd.dentry->d_inode->i_mutex);
mutex_lock_nested(&nd.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
dentry = lookup_hash(&nd);
error = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {
@@ -2082,7 +2082,7 @@ static long do_unlinkat(int dfd, const char __user *pathname)
error = -EISDIR;
if (nd.last_type != LAST_NORM)
goto exit1;
mutex_lock(&nd.dentry->d_inode->i_mutex);
mutex_lock_nested(&nd.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
dentry = lookup_hash(&nd);
error = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {