[PATCH v2] xen/arm: p2m_set_entry reuse mask variables

[Paran Lee <p4ranlee@xxxxxxxxx>]

Reuse mask variables on order shift duplicated calculation.

Signed-off-by: Paran Lee <p4ranlee@xxxxxxxxx>
---
 xen/arch/arm/p2m.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 1d1059f7d2..cdb3b56aa1 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -1118,11 +1118,12 @@ int p2m_set_entry(struct p2m_domain *p2m,
         if ( rc )
             break;
 
-        sgfn = gfn_add(sgfn, (1 << order));
+        mask = 1UL << order;
+        sgfn = gfn_add(sgfn, mask);
         if ( !mfn_eq(smfn, INVALID_MFN) )
-           smfn = mfn_add(smfn, (1 << order));
+           smfn = mfn_add(smfn, mask);
 
-        nr -= (1 << order);
+        nr -= mask;
     }
 
     return rc;
-- 
2.25.1