[v4,8/9] x86/mm: add an end_of_loop label in modify_xen_mappings
diff mbox series

Message ID 1f413130d6ab27ab5f7754606ffed38bdff0829c.1575477921.git.hongyxia@amazon.com
State New, archived
Headers show
Series
  • Add alternative API for Xen PTEs
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Commit Message

Xia, Hongyan Dec. 4, 2019, 5:11 p.m. UTC
From: Wei Liu <wei.liu2@citrix.com>

We will soon need to clean up mappings whenever the out most loop
is ended. Add a new label and turn relevant continue's into goto's.

No functional change.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 xen/arch/x86/mm.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

Patch
diff mbox series

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 4c659c28d8..d3b0956a3a 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -5604,7 +5604,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
 
             v += 1UL << L3_PAGETABLE_SHIFT;
             v &= ~((1UL << L3_PAGETABLE_SHIFT) - 1);
-            continue;
+            goto end_of_loop;
         }
 
         if ( l3e_get_flags(*pl3e) & _PAGE_PSE )
@@ -5622,7 +5622,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
 
                 l3e_write_atomic(pl3e, nl3e);
                 v += 1UL << L3_PAGETABLE_SHIFT;
-                continue;
+                goto end_of_loop;
             }
 
             /* PAGE1GB: shatter the superpage and fall through. */
@@ -5663,7 +5663,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
 
             v += 1UL << L2_PAGETABLE_SHIFT;
             v &= ~((1UL << L2_PAGETABLE_SHIFT) - 1);
-            continue;
+            goto end_of_loop;
         }
 
         if ( l2e_get_flags(*pl2e) & _PAGE_PSE )
@@ -5734,7 +5734,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
              * skip the empty&free check.
              */
             if ( (nf & _PAGE_PRESENT) || ((v != e) && (l1_table_offset(v) != 0)) )
-                continue;
+                goto end_of_loop;
             if ( locking )
                 spin_lock(&map_pgdir_lock);
 
@@ -5753,7 +5753,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
             {
                 if ( locking )
                     spin_unlock(&map_pgdir_lock);
-                continue;
+                goto end_of_loop;
             }
 
             l1t = l2e_to_l1e(*pl2e);
@@ -5780,7 +5780,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
          */
         if ( (nf & _PAGE_PRESENT) ||
              ((v != e) && (l2_table_offset(v) + l1_table_offset(v) != 0)) )
-            continue;
+            goto end_of_loop;
         if ( locking )
             spin_lock(&map_pgdir_lock);
 
@@ -5793,7 +5793,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
         {
             if ( locking )
                 spin_unlock(&map_pgdir_lock);
-            continue;
+            goto end_of_loop;
         }
 
         {
@@ -5815,6 +5815,7 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int nf)
             else if ( locking )
                 spin_unlock(&map_pgdir_lock);
         }
+    end_of_loop:;
     }
 
     flush_area(NULL, FLUSH_TLB_GLOBAL);