[xen staging] x86/shadow: don't open-code shadow_blow_tables_per_domain()

[patchbot@xxxxxxx]

commit 7aacf6ac49829d8dd6242f67460f4d52d0d36503
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Apr 21 11:03:46 2020 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Apr 21 11:03:46 2020 +0200

    x86/shadow: don't open-code shadow_blow_tables_per_domain()
    
    Make shadow_blow_all_tables() call the designated function, and on this
    occasion make the function itself use domain_vcpu().
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Tim Deegan <tim@xxxxxxx>
---
 xen/arch/x86/mm/shadow/common.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/xen/arch/x86/mm/shadow/common.c b/xen/arch/x86/mm/shadow/common.c
index ad15803cc8..aad977ccd7 100644
--- a/xen/arch/x86/mm/shadow/common.c
+++ b/xen/arch/x86/mm/shadow/common.c
@@ -1005,7 +1005,8 @@ static void shadow_blow_tables(struct domain *d)
 
 void shadow_blow_tables_per_domain(struct domain *d)
 {
-    if ( shadow_mode_enabled(d) && d->vcpu != NULL && d->vcpu[0] != NULL ) {
+    if ( shadow_mode_enabled(d) && domain_vcpu(d, 0) )
+    {
         paging_lock(d);
         shadow_blow_tables(d);
         paging_unlock(d);
@@ -1022,14 +1023,7 @@ static void shadow_blow_all_tables(unsigned char c)
     printk("'%c' pressed -> blowing all shadow tables\n", c);
     rcu_read_lock(&domlist_read_lock);
     for_each_domain(d)
-    {
-        if ( shadow_mode_enabled(d) && d->vcpu != NULL && d->vcpu[0] != NULL )
-        {
-            paging_lock(d);
-            shadow_blow_tables(d);
-            paging_unlock(d);
-        }
-    }
+        shadow_blow_tables_per_domain(d);
     rcu_read_unlock(&domlist_read_lock);
 }
 
--
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