[PATCH] xen/arm: livepatch: Include xen/mm.h rather than asm/mm.h

[Julien Grall <julien@xxxxxxx>]

From: Julien Grall <jgrall@xxxxxxxxxx>

Livepatch fails to build on Arm after commit ced9795c6cb4 "mm: split
out mfn_t / gfn_t / pfn_t definitions and helpers":

In file included from livepatch.c:13:0:
/oss/xen/xen/include/asm/mm.h:32:28: error: field ‘list’ has incomplete type
     struct page_list_entry list;
                            ^~~~
/oss/xen/xen/include/asm/mm.h:53:43: error: ‘MAX_ORDER’ undeclared here (not in 
a function); did you mean ‘PFN_ORDER’?
                 unsigned long first_dirty:MAX_ORDER + 1;
                                           ^~~~~~~~~
                                           PFN_ORDER
/oss/xen/xen/include/asm/mm.h:53:31: error: bit-field ‘first_dirty’ width not 
an integer constant
                 unsigned long first_dirty:MAX_ORDER + 1;
                               ^~~~~~~~~~~

This is happening because asm/mm.h is included directly by livepatch.c.
Yet it depends on xen/mm.h to be included first so MAX_ORDER is defined.

Resolve the build failure by including xen/mm.h rather than asm/mm.h.

Fixes: ced9795c6cb4 ("mm: split out mfn_t / gfn_t / pfn_t definitions and 
helpers")
Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
---
 xen/arch/arm/livepatch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/livepatch.c b/xen/arch/arm/livepatch.c
index 915e9d926a11..75e8adcfd6a1 100644
--- a/xen/arch/arm/livepatch.c
+++ b/xen/arch/arm/livepatch.c
@@ -6,11 +6,11 @@
 #include <xen/lib.h>
 #include <xen/livepatch_elf.h>
 #include <xen/livepatch.h>
+#include <xen/mm.h>
 #include <xen/vmap.h>
 
 #include <asm/cpufeature.h>
 #include <asm/livepatch.h>
-#include <asm/mm.h>
 
 /* Override macros from asm/page.h to make them work with mfn_t */
 #undef virt_to_mfn
-- 
2.17.1