xen: replace callers of alloc_vm_area()/free_vm_area() with xen_ prefixed one

Don't use alloc_vm_area()/free_vm_area() directly, instead define
xen_alloc_vm_area()/xen_free_vm_area() and use them.

alloc_vm_area()/free_vm_area() are used to allocate/free area which
are for grant table mapping. Xen/x86 grant table is based on virtual
address so that alloc_vm_area()/free_vm_area() are suitable.
On the other hand Xen/ia64 (and Xen/powerpc) grant table is based on
pseudo physical address (guest physical address) so that allocation
should be done differently.
The original version of xenified Linux/IA64 have its own
allocate_vm_area()/free_vm_area() definitions which don't allocate vm area
contradictory to those names.
Now vanilla Linux already has its definitions so that it's impossible
to have IA64 definitions of allocate_vm_area()/free_vm_area().
Instead introduce xen_allocate_vm_area()/xen_free_vm_area() and use them.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

4 files changed, 12 insertions, 4 deletions

diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index d4a89b3d694f..3e02808c4055 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -482,7 +482,7 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
 
         if (shared == NULL) {
                 struct vm_struct *area;
-                area = alloc_vm_area(PAGE_SIZE * max_nr_grant_frames());
+                area = xen_alloc_vm_area(PAGE_SIZE * max_nr_grant_frames());
                 BUG_ON(area == NULL);
                 shared = area->addr;
         }
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index 9fd2f70ab46d..0f86b0ff7879 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -399,7 +399,7 @@ int xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref, void **vaddr)
 
         *vaddr = NULL;
 
-        area = alloc_vm_area(PAGE_SIZE);
+        area = xen_alloc_vm_area(PAGE_SIZE);
         if (!area)
                 return -ENOMEM;
 
@@ -409,7 +409,7 @@ int xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref, void **vaddr)
                 BUG();
 
         if (op.status != GNTST_okay) {
-                free_vm_area(area);
+                xen_free_vm_area(area);
                 xenbus_dev_fatal(dev, op.status,
                                  "mapping in shared page %d from domain %d",
                                  gnt_ref, dev->otherend_id);
@@ -508,7 +508,7 @@ int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr)
                 BUG();
 
         if (op.status == GNTST_okay)
-                free_vm_area(area);
+                xen_free_vm_area(area);
         else
                 xenbus_dev_error(dev, op.status,
                                  "unmapping page at handle %d error %d",
diff --git a/include/asm-x86/xen/grant_table.h b/include/asm-x86/xen/grant_table.h
new file mode 100644
index 000000000000..2444d4593a3b
--- /dev/null
+++ b/include/asm-x86/xen/grant_table.h
@@ -0,0 +1,7 @@
+#ifndef __XEN_GRANT_TABLE_H
+#define __XEN_GRANT_TABLE_H
+
+#define xen_alloc_vm_area(size) alloc_vm_area(size)
+#define xen_free_vm_area(area)  free_vm_area(area)
+
+#endif /* __XEN_GRANT_TABLE_H */
diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index 761c83498e03..d2822920d43e 100644
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -39,6 +39,7 @@
 
 #include <asm/xen/hypervisor.h>
 #include <xen/interface/grant_table.h>
+#include <asm/xen/grant_table.h>
 
 /* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */
 #define NR_GRANT_FRAMES 4