[kernel/rawhide/user/myoung/xendom0] add patch to allow xen-blkback to build as module

[myoung]

commit 84def05900f4e68b35b48a1abc719e621cd65fd5
Author: Michael Young <m.a.young at durham.ac.uk>
Date:   Tue Mar 15 20:52:00 2011 +0000

    add patch to allow xen-blkback to build as module

 kernel.spec  |    4 ++++
 p2mfix.patch |   18 ++++++++++++++++++
 2 files changed, 22 insertions(+), 0 deletions(-)
---
diff --git a/kernel.spec b/kernel.spec
index 7925d2b..d88ce6b 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -745,6 +745,8 @@ Patch12421: fs-call-security_d_instantiate-in-d_obtain_alias.patch
 # git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git branches
 #Patch20005: xen.pcifront.fixes.patch
 Patch20006: xen.pcifront.next-2.6.38.patch
+# build fix
+Patch20007: p2mfix.patch
 # git://xenbits.xen.org/people/sstabellini/linux-pvhvm branches
 #Patch20010: xen.pvhvm.fixes.patch
 
@@ -1383,6 +1385,7 @@ ApplyPatch fs-call-security_d_instantiate-in-d_obtain_alias.patch
 #ApplyPatch xen.upstream.core.patch
 #ApplyPatch xen.pcifront.fixes.patch
 ApplyPatch xen.pcifront.next-2.6.38.patch
+ApplyPatch p2mfix.patch
 #ApplyPatch xen.pvhvm.fixes.patch
 
 # END OF PATCH APPLICATIONS
@@ -1998,6 +2001,7 @@ fi
   for ease of maintenance
   patch is git diff v2.6.38...3d67ff0c8f180f2cc4ade645f6f9571b26816e5a
 - set new xen-blkback to be a module CONFIG_XEN_BLKDEV_BACKEND=m
+- add patch to allow xen-blkback to build as module
 
 * Tue Mar 15 2011 Adam Jackson <ajax at redhat.com>
 - drm-intel-big-hammer.patch: Drop.
diff --git a/p2mfix.patch b/p2mfix.patch
new file mode 100644
index 0000000..9aad587
--- /dev/null
+++ b/p2mfix.patch
@@ -0,0 +1,18 @@
+--- linux-2.6.38.x86_64/arch/x86/xen/p2m.c.orig	2011-03-15 19:51:44.000000000 +0000
++++ linux-2.6.38.x86_64/arch/x86/xen/p2m.c	2011-03-15 20:38:38.000000000 +0000
+@@ -557,6 +557,7 @@
+ 
+ 	return 0;
+ }
++EXPORT_SYMBOL_GPL(m2p_add_override);
+ 
+ int m2p_remove_override(struct page *page, bool clear_pte)
+ {
+@@ -594,6 +595,7 @@
+ 
+ 	return 0;
+ }
++EXPORT_SYMBOL_GPL(m2p_remove_override);
+ 
+ struct page *m2p_find_override(unsigned long mfn)
+ {