[PATCH v2 1/3] xen/arm: move xen_swiotlb_detect to arm/swiotlb-xen.h

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>

Move xen_swiotlb_detect to a static inline function to make it available
to !CONFIG_XEN builds.

CC: boris.ostrovsky@xxxxxxxxxx
CC: jgross@xxxxxxxx
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>

---
Changes in v2:
- patch split
---
 arch/arm/xen/mm.c             | 12 ------------
 include/xen/arm/swiotlb-xen.h | 15 ++++++++++++++-
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index f8f07469d259..223b1151fd7d 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -135,18 +135,6 @@ void xen_destroy_contiguous_region(phys_addr_t pstart, 
unsigned int order)
        return;
 }
 
-int xen_swiotlb_detect(void)
-{
-       if (!xen_domain())
-               return 0;
-       if (xen_feature(XENFEAT_direct_mapped))
-               return 1;
-       /* legacy case */
-       if (!xen_feature(XENFEAT_not_direct_mapped) && xen_initial_domain())
-               return 1;
-       return 0;
-}
-
 static int __init xen_mm_init(void)
 {
        struct gnttab_cache_flush cflush;
diff --git a/include/xen/arm/swiotlb-xen.h b/include/xen/arm/swiotlb-xen.h
index 2994fe6031a0..33336ab58afc 100644
--- a/include/xen/arm/swiotlb-xen.h
+++ b/include/xen/arm/swiotlb-xen.h
@@ -2,6 +2,19 @@
 #ifndef _ASM_ARM_SWIOTLB_XEN_H
 #define _ASM_ARM_SWIOTLB_XEN_H
 
-extern int xen_swiotlb_detect(void);
+#include <xen/features.h>
+#include <xen/xen.h>
+
+static inline int xen_swiotlb_detect(void)
+{
+       if (!xen_domain())
+               return 0;
+       if (xen_feature(XENFEAT_direct_mapped))
+               return 1;
+       /* legacy case */
+       if (!xen_feature(XENFEAT_not_direct_mapped) && xen_initial_domain())
+               return 1;
+       return 0;
+}
 
 #endif /* _ASM_ARM_SWIOTLB_XEN_H */
-- 
2.17.1