[for-4.20][PATCH v2 2/2] xen/arm: Fix build issue when CONFIG_PHYS_ADDR_T_32=y

[Michal Orzel <michal.orzel@xxxxxxx>]

On Arm32, when CONFIG_PHYS_ADDR_T_32 is set, a build failure is observed:
arch/arm/platforms/vexpress.c: In function 'vexpress_smp_init':
arch/arm/platforms/vexpress.c:102:12: error: format '%lx' expects argument of 
type 'long unsigned int', but argument 2 has type 'long long unsigned int' 
[-Werror=format=]
  102 |     printk("Set SYS_FLAGS to %"PRIpaddr" (%p)\n",

When CONFIG_PHYS_ADDR_T_32 is set, paddr_t is defined as unsigned long.
Commit 96f35de69e59 dropped __virt_to_maddr() which used paddr_t as a
return type. Without a cast, the expression type is unsigned long long
which causes the issue. Fix it.

Fixes: 96f35de69e59 ("x86+Arm: drop (rename) __virt_to_maddr() / 
__maddr_to_virt()")
Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Tested-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
Changes in v2:
 - none
---
 xen/arch/arm/include/asm/mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/include/asm/mm.h b/xen/arch/arm/include/asm/mm.h
index f91ff088f6b1..a0d8e5afe977 100644
--- a/xen/arch/arm/include/asm/mm.h
+++ b/xen/arch/arm/include/asm/mm.h
@@ -263,7 +263,7 @@ static inline void __iomem *ioremap_wc(paddr_t start, 
size_t len)
 
 #define virt_to_maddr(va) ({                                        \
     vaddr_t va_ = (vaddr_t)(va);                                    \
-    (va_to_par(va_) & PADDR_MASK & PAGE_MASK) | (va_ & ~PAGE_MASK); \
+    (paddr_t)((va_to_par(va_) & PADDR_MASK & PAGE_MASK) | (va_ & ~PAGE_MASK)); 
\
 })
 
 #ifdef CONFIG_ARM_32
-- 
2.25.1