X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=include%2Flinux%2Ffs.h;h=a509bee30c50735771e37f8a6778f6a888393eb4;hp=44e856ba8a7991c3e783c057885175bd6f4d7282;hb=9d6c5babc04522ff85b550f14563970279ab8f90;hpb=80055f78a9696b7760c9f673671cb840ca9a3f46

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 44e856ba8a79..a509bee30c50 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -486,6 +486,12 @@ struct iattr {
  */
 #include <linux/quota.h>
 
+/*
+ * Maximum number of layers of fs stack.  Needs to be limited to
+ * prevent kernel stack overflow
+ */
+#define FILESYSTEM_MAX_STACK_DEPTH 2
+
 /** 
  * enum positive_aop_returns - aop return codes with specific semantics
  *
@@ -1497,6 +1503,11 @@ struct super_block {
 	int cleancache_poolid;
 
 	struct shrinker s_shrink;	/* per-sb shrinker handle */
+
+	/*
+	 * Indicates how deep in a filesystem stack this SB is
+	 */
+	int s_stack_depth;
 };
 
 /* superblock cache pruning functions */