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wrappers for ->i_mutex access

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parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-01-22 15:40:57 -05:00
parent 57b8f112cf
commit 5955102c99
177 changed files with 908 additions and 883 deletions
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22
fs/debugfs/inode.c
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@@ -265,7 +265,7 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
if (!parent)
parent = debugfs_mount->mnt_root;
mutex_lock(&d_inode(parent)->i_mutex);
inode_lock(d_inode(parent));
dentry = lookup_one_len(name, parent, strlen(name));
if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {
dput(dentry);
@@ -273,7 +273,7 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
}
if (IS_ERR(dentry)) {
mutex_unlock(&d_inode(parent)->i_mutex);
inode_unlock(d_inode(parent));
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
}
@@ -282,7 +282,7 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
static struct dentry *failed_creating(struct dentry *dentry)
{
mutex_unlock(&d_inode(dentry->d_parent)->i_mutex);
inode_unlock(d_inode(dentry->d_parent));
dput(dentry);
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
return NULL;
@@ -290,7 +290,7 @@ static struct dentry *failed_creating(struct dentry *dentry)
static struct dentry *end_creating(struct dentry *dentry)
{
mutex_unlock(&d_inode(dentry->d_parent)->i_mutex);
inode_unlock(d_inode(dentry->d_parent));
return dentry;
}
@@ -560,9 +560,9 @@ void debugfs_remove(struct dentry *dentry)
if (!parent || d_really_is_negative(parent))
return;
mutex_lock(&d_inode(parent)->i_mutex);
inode_lock(d_inode(parent));
ret = __debugfs_remove(dentry, parent);
mutex_unlock(&d_inode(parent)->i_mutex);
inode_unlock(d_inode(parent));
if (!ret)
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
}
@@ -594,7 +594,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
parent = dentry;
down:
mutex_lock(&d_inode(parent)->i_mutex);
inode_lock(d_inode(parent));
loop:
/*
* The parent->d_subdirs is protected by the d_lock. Outside that
@@ -609,7 +609,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
/* perhaps simple_empty(child) makes more sense */
if (!list_empty(&child->d_subdirs)) {
spin_unlock(&parent->d_lock);
mutex_unlock(&d_inode(parent)->i_mutex);
inode_unlock(d_inode(parent));
parent = child;
goto down;
}
@@ -630,10 +630,10 @@ void debugfs_remove_recursive(struct dentry *dentry)
}
spin_unlock(&parent->d_lock);
mutex_unlock(&d_inode(parent)->i_mutex);
inode_unlock(d_inode(parent));
child = parent;
parent = parent->d_parent;
mutex_lock(&d_inode(parent)->i_mutex);
inode_lock(d_inode(parent));
if (child != dentry)
/* go up */
@@ -641,7 +641,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
if (!__debugfs_remove(child, parent))
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
mutex_unlock(&d_inode(parent)->i_mutex);
inode_unlock(d_inode(parent));
}
EXPORT_SYMBOL_GPL(debugfs_remove_recursive);