fs: take dcache_lock inside __d_path

[firefly-linux-kernel-4.4.55.git] / fs / seq_file.c

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 5afd554efad32cbcb620838178f84ec0b5debc9b..05d6b0e78c959a341137c97fbb2ea2fa89b25197 100644 (file)
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -131,7 +131,7 @@ Eoverflow:
  */
 ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
 {
-       struct seq_file *m = (struct seq_file *)file->private_data;
+       struct seq_file *m = file->private_data;
        size_t copied = 0;
        loff_t pos;
        size_t n;
@@ -280,7 +280,7 @@ EXPORT_SYMBOL(seq_read);
  */
 loff_t seq_lseek(struct file *file, loff_t offset, int origin)
 {
-       struct seq_file *m = (struct seq_file *)file->private_data;
+       struct seq_file *m = file->private_data;
        loff_t retval = -EINVAL;
 
        mutex_lock(&m->lock);
@@ -324,7 +324,7 @@ EXPORT_SYMBOL(seq_lseek);
  */
 int seq_release(struct inode *inode, struct file *file)
 {
-       struct seq_file *m = (struct seq_file *)file->private_data;
+       struct seq_file *m = file->private_data;
        kfree(m->buf);
        kfree(m);
        return 0;
@@ -462,9 +462,7 @@ int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
        if (size) {
                char *p;
 
-               spin_lock(&dcache_lock);
                p = __d_path(path, root, buf, size);
-               spin_unlock(&dcache_lock);
                res = PTR_ERR(p);
                if (!IS_ERR(p)) {
                        char *end = mangle_path(buf, p, esc);
@@ -734,7 +732,7 @@ EXPORT_SYMBOL(seq_hlist_start_head);
  * seq_hlist_next - move to the next position of the hlist
  * @v:    the current iterator
  * @head: the head of the hlist
- * @pos:  the current posision
+ * @ppos: the current position
  *
  * Called at seq_file->op->next().
  */
@@ -800,7 +798,7 @@ EXPORT_SYMBOL(seq_hlist_start_head_rcu);
  * seq_hlist_next_rcu - move to the next position of the hlist protected by RCU
  * @v:    the current iterator
  * @head: the head of the hlist
- * @pos:  the current posision
+ * @ppos: the current position
  *
  * Called at seq_file->op->next().
  *