commit 403c798f66af3d12ba1504aff5420cf3fcd67c71
Author: Erez_Zadok <[EMAIL PROTECTED]>
Date:   Tue Aug 7 18:54:34 2007 -0400

    Unionfs: support incremental versions
    
    Also: release Unionfs 2.1 (since code has gotten much more stable since 2.0)
    
    Unionfs will now report its precise version number and the kernel it was
    meant for, upon module loading.  This is useful for maintenance purposes:
    users can report the precise release number of Unionfs, and it also helps
    prevent running older versions when newer ones are intended, or mixing
    versions among supported kernels.
    
    Signed-off-by: Erez Zadok <[EMAIL PROTECTED]>

diff --git a/fs/unionfs/Makefile b/fs/unionfs/Makefile
index 7c18a3c..0dd5219 100644
--- a/fs/unionfs/Makefile
+++ b/fs/unionfs/Makefile
@@ -1,3 +1,7 @@
+UNIONFS_VERSION="2.1 (for 2.6.19.7)"
+
+EXTRA_CFLAGS += -DUNIONFS_VERSION=\"$(UNIONFS_VERSION)\"
+
 obj-$(CONFIG_UNION_FS) += unionfs.o
 
 unionfs-y := subr.o dentry.o file.o inode.o main.o super.o \
diff --git a/include/linux/union_fs.h b/include/linux/union_fs.h
index 9bc4e3b..d13eb48 100644
--- a/include/linux/union_fs.h
+++ b/include/linux/union_fs.h
@@ -12,7 +12,6 @@
 #ifndef _LINUX_UNION_FS_H
 #define _LINUX_UNION_FS_H
 
-#define UNIONFS_VERSION  "2.0"
 /*
  * DEFINITIONS FOR USER AND KERNEL CODE:
  */
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