Merge branch 'stable-3.2' into pandora-3.2

[pandora-kernel.git] / fs / debugfs / inode.c

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index f3a257d..d813d6f 100644 (file)
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -30,7 +30,7 @@ static struct vfsmount *debugfs_mount;
 static int debugfs_mount_count;
 static bool debugfs_registered;
 
-static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t dev,
+static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev_t dev,
                                       void *data, const struct file_operations *fops)
 
 {
@@ -69,7 +69,7 @@ static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t d
 
 /* SMP-safe */
 static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
-                        int mode, dev_t dev, void *data,
+                        umode_t mode, dev_t dev, void *data,
                         const struct file_operations *fops)
 {
        struct inode *inode;
@@ -87,7 +87,7 @@ static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
        return error;
 }
 
-static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, int mode,
+static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode,
                         void *data, const struct file_operations *fops)
 {
        int res;
@@ -101,14 +101,14 @@ static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, int mode,
        return res;
 }
 
-static int debugfs_link(struct inode *dir, struct dentry *dentry, int mode,
+static int debugfs_link(struct inode *dir, struct dentry *dentry, umode_t mode,
                        void *data, const struct file_operations *fops)
 {
        mode = (mode & S_IALLUGO) | S_IFLNK;
        return debugfs_mknod(dir, dentry, mode, 0, data, fops);
 }
 
-static int debugfs_create(struct inode *dir, struct dentry *dentry, int mode,
+static int debugfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
                          void *data, const struct file_operations *fops)
 {
        int res;
@@ -146,7 +146,7 @@ static struct file_system_type debug_fs_type = {
        .kill_sb =      kill_litter_super,
 };
 
-static int debugfs_create_by_name(const char *name, mode_t mode,
+static int debugfs_create_by_name(const char *name, umode_t mode,
                                  struct dentry *parent,
                                  struct dentry **dentry,
                                  void *data,
@@ -214,7 +214,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode,
  * If debugfs is not enabled in the kernel, the value -%ENODEV will be
  * returned.
  */
-struct dentry *debugfs_create_file(const char *name, mode_t mode,
+struct dentry *debugfs_create_file(const char *name, umode_t mode,
                                   struct dentry *parent, void *data,
                                   const struct file_operations *fops)
 {
@@ -380,8 +380,7 @@ EXPORT_SYMBOL_GPL(debugfs_remove);
  */
 void debugfs_remove_recursive(struct dentry *dentry)
 {
-       struct dentry *child;
-       struct dentry *parent;
+       struct dentry *child, *next, *parent;
 
        if (!dentry)
                return;
@@ -391,61 +390,37 @@ void debugfs_remove_recursive(struct dentry *dentry)
                return;
 
        parent = dentry;
+ down:
        mutex_lock(&parent->d_inode->i_mutex);
+       list_for_each_entry_safe(child, next, &parent->d_subdirs, d_u.d_child) {
+               if (!debugfs_positive(child))
+                       continue;
 
-       while (1) {
-               /*
-                * When all dentries under "parent" has been removed,
-                * walk up the tree until we reach our starting point.
-                */
-               if (list_empty(&parent->d_subdirs)) {
-                       mutex_unlock(&parent->d_inode->i_mutex);
-                       if (parent == dentry)
-                               break;
-                       parent = parent->d_parent;
-                       mutex_lock(&parent->d_inode->i_mutex);
-               }
-               child = list_entry(parent->d_subdirs.next, struct dentry,
-                               d_u.d_child);
- next_sibling:
-
-               /*
-                * If "child" isn't empty, walk down the tree and
-                * remove all its descendants first.
-                */
+               /* perhaps simple_empty(child) makes more sense */
                if (!list_empty(&child->d_subdirs)) {
                        mutex_unlock(&parent->d_inode->i_mutex);
                        parent = child;
-                       mutex_lock(&parent->d_inode->i_mutex);
-                       continue;
-               }
-               __debugfs_remove(child, parent);
-               if (parent->d_subdirs.next == &child->d_u.d_child) {
-                       /*
-                        * Try the next sibling.
-                        */
-                       if (child->d_u.d_child.next != &parent->d_subdirs) {
-                               child = list_entry(child->d_u.d_child.next,
-                                                  struct dentry,
-                                                  d_u.d_child);
-                               goto next_sibling;
-                       }
-
-                       /*
-                        * Avoid infinite loop if we fail to remove
-                        * one dentry.
-                        */
-                       mutex_unlock(&parent->d_inode->i_mutex);
-                       break;
+                       goto down;
                }
-               simple_release_fs(&debugfs_mount, &debugfs_mount_count);
+ up:
+               if (!__debugfs_remove(child, parent))
+                       simple_release_fs(&debugfs_mount, &debugfs_mount_count);
        }
 
-       parent = dentry->d_parent;
+       mutex_unlock(&parent->d_inode->i_mutex);
+       child = parent;
+       parent = parent->d_parent;
        mutex_lock(&parent->d_inode->i_mutex);
-       __debugfs_remove(dentry, parent);
+
+       if (child != dentry) {
+               next = list_entry(child->d_u.d_child.next, struct dentry,
+                                       d_u.d_child);
+               goto up;
+       }
+
+       if (!__debugfs_remove(child, parent))
+               simple_release_fs(&debugfs_mount, &debugfs_mount_count);
        mutex_unlock(&parent->d_inode->i_mutex);
-       simple_release_fs(&debugfs_mount, &debugfs_mount_count);
 }
 EXPORT_SYMBOL_GPL(debugfs_remove_recursive);