swapper_space export

[Josef Sipek <jsipek@fsl.cs.sunysb.edu>]

I was trying to compile the Unionfs[1] to get it up to sync it up with
the kernel developments from the past few months. Anyway, long story
short...swapper_space (defined in mm/swap_state.c) is not exported
anymore (git commit: 4936967374c1ad0eb3b734f24875e2484c3786cc). This
apparently is not an issue for most modules. Troubles arise when the
modules include mm.h or any of its relatives.

One simply gets a linker error about swapper_space not being defined.
The problem is that it is used in mm.h.

I included a reverse patch to export the symbol again.

Josef "Jeff" Sipek.

[1] http://unionfs.filesystems.org


Export swapper_space because several include files reference it.

Signed-off-by: Josef Sipek <jsipek@cs.sunysb.edu>

--- a/mm/swap_state.c.orig	2006-05-16 18:23:38.000000000 -0400
+++ b/mm/swap_state.c		2006-05-16 18:22:57.000000000 -0400
@@ -43,6 +43,7 @@
 	.i_mmap_nonlinear = LIST_HEAD_INIT(swapper_space.i_mmap_nonlinear),
 	.backing_dev_info = &swap_backing_dev_info,
 };
+EXPORT_SYMBOL(swapper_space);
 
 #define INC_CACHE_INFO(x)	do { swap_cache_info.x++; } while (0)