orangefs: don't open-code inode_lock/inode_unlock

Signed-off-by: Al Viro <[e-mail]>

fs/orangefs/file.c

···
 
 	gossip_debug(GOSSIP_FILE_DEBUG, "orangefs_file_write_iter\n");
 
-	mutex_lock(&file->f_mapping->host->i_mutex);
+	inode_lock(file->f_mapping->host);
 
 	/* Make sure generic_write_checks sees an up to date inode size. */
 	if (file->f_flags & O_APPEND) {
···
 
 out:
 
-	mutex_unlock(&file->f_mapping->host->i_mutex);
+	inode_unlock(file->f_mapping->host);
 	return rc;
 }
 

fs/orangefs/orangefs-kernel.h

···
 static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
 {
 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
-	mutex_lock(&inode->i_mutex);
+	inode_lock(inode);
 #endif
 	i_size_write(inode, i_size);
 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
-	mutex_unlock(&inode->i_mutex);
+	inode_unlock(inode);
 #endif
 }