Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "Lots of bug fixes and cleanups"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (40 commits)
  ext4: remove unused variable
  ext4: use journal inode to determine journal overhead
  ext4: create function to read journal inode
  ext4: unmap metadata when zeroing blocks
  ext4: remove plugging from ext4_file_write_iter()
  ext4: allow unlocked direct IO when pages are cached
  ext4: require encryption feature for EXT4_IOC_SET_ENCRYPTION_POLICY
  fscrypto: use standard macros to compute length of fname ciphertext
  ext4: do not unnecessarily null-terminate encrypted symlink data
  ext4: release bh in make_indexed_dir
  ext4: Allow parallel DIO reads
  ext4: allow DAX writeback for hole punch
  jbd2: fix lockdep annotation in add_transaction_credits()
  blockgroup_lock.h: simplify definition of NR_BG_LOCKS
  blockgroup_lock.h: remove debris from bgl_lock_ptr() conversion
  fscrypto: make filename crypto functions return 0 on success
  fscrypto: rename completion callbacks to reflect usage
  fscrypto: remove unnecessary includes
  fscrypto: improved validation when loading inode encryption metadata
  ext4: fix memory leak when symlink decryption fails
  ...

fs/f2fs/namei.c

@@ -454,7 +454,7 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 		ostr.name = sd->encrypted_path;
 		ostr.len = disk_link.len;
 		err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
-		if (err < 0)
+		if (err)
 			goto err_out;
 
 		sd->len = cpu_to_le16(ostr.len);
@@ -1051,7 +1051,7 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry,
 		goto errout;
 
 	res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
-	if (res < 0)
+	if (res)
 		goto errout;
 
 	/* this is broken symlink case */
@@ -1063,7 +1063,7 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry,
 	paddr = pstr.name;
 
 	/* Null-terminate the name */
-	paddr[res] = '\0';
+	paddr[pstr.len] = '\0';
 
 	put_page(cpage);
 	set_delayed_call(done, kfree_link, paddr);