ext2: Add ext2_sb_info s_lock spinlock

[pandora-kernel.git] / include / linux / ext2_fs_sb.h

diff --git a/include/linux/ext2_fs_sb.h b/include/linux/ext2_fs_sb.h
index 1cdb663..db4d9f5 100644 (file)
--- a/include/linux/ext2_fs_sb.h
+++ b/include/linux/ext2_fs_sb.h
@@ -106,6 +106,15 @@ struct ext2_sb_info {
        spinlock_t s_rsv_window_lock;
        struct rb_root s_rsv_window_root;
        struct ext2_reserve_window_node s_rsv_window_head;
+       /*
+        * s_lock protects against concurrent modifications of s_mount_state,
+        * s_blocks_last, s_overhead_last and the content of superblock's
+        * buffer pointed to by sbi->s_es.
+        *
+        * Note: It is used in ext2_show_options() to provide a consistent view
+        * of the mount options.
+        */
+       spinlock_t s_lock;
 };
 
 static inline spinlock_t *