[Xen-changelog] [xen stable-4.10] xen/pvshim: re-order replace_va_mapping code

[patchbot@xxxxxxx]

commit ee478f473740a79cdbb74fe67306724dd5ca1e62
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Wed Jan 17 09:24:03 2018 +0000
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Mon Mar 5 15:49:50 2018 +0000

    xen/pvshim: re-order replace_va_mapping code
    
    No functional change.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    (cherry picked from commit 72eb5d7320192a7999f5ca840b65d4935e202e89)
---
 xen/arch/x86/pv/shim.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/xen/arch/x86/pv/shim.c b/xen/arch/x86/pv/shim.c
index 702249719e..aa5d416b75 100644
--- a/xen/arch/x86/pv/shim.c
+++ b/xen/arch/x86/pv/shim.c
@@ -117,21 +117,12 @@ uint64_t pv_shim_mem(uint64_t avail)
 static void __init replace_va_mapping(struct domain *d, l4_pgentry_t *l4start,
                                       unsigned long va, unsigned long mfn)
 {
-    struct page_info *page;
-    l4_pgentry_t *pl4e;
-    l3_pgentry_t *pl3e;
-    l2_pgentry_t *pl2e;
-    l1_pgentry_t *pl1e;
-
-    pl4e = l4start + l4_table_offset(va);
-    pl3e = l4e_to_l3e(*pl4e);
-    pl3e += l3_table_offset(va);
-    pl2e = l3e_to_l2e(*pl3e);
-    pl2e += l2_table_offset(va);
-    pl1e = l2e_to_l1e(*pl2e);
-    pl1e += l1_table_offset(va);
-
-    page = mfn_to_page(l1e_get_pfn(*pl1e));
+    l4_pgentry_t *pl4e = l4start + l4_table_offset(va);
+    l3_pgentry_t *pl3e = l4e_to_l3e(*pl4e) + l3_table_offset(va);
+    l2_pgentry_t *pl2e = l3e_to_l2e(*pl3e) + l2_table_offset(va);
+    l1_pgentry_t *pl1e = l2e_to_l1e(*pl2e) + l1_table_offset(va);
+    struct page_info *page = mfn_to_page(l1e_get_pfn(*pl1e));
+
     put_page_and_type(page);
 
     *pl1e = l1e_from_pfn(mfn, (!is_pv_32bit_domain(d) ? L1_PROT
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.10

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/xen-changelog