[Xen-changelog] [xen-unstable] acpi sleep: domain_freeze() pauses all vcpus, but does not sync the

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1271330460 -3600
# Node ID 9d5ecf79f1b51bbf2979b6f2830868e50acd3419
# Parent  11423ce78ee0ff314351c10842dcac9af6e11d1e
acpi sleep: domain_freeze() pauses all vcpus, but does not sync the
current vcpu (since that would obviously deadlock).

This simplifies thaw_domains() which is required now that thawing can
happen in deifferent context to freeze_domains().

Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/arch/x86/acpi/power.c |   27 +++++++--------------------
 1 files changed, 7 insertions(+), 20 deletions(-)

diff -r 11423ce78ee0 -r 9d5ecf79f1b5 xen/arch/x86/acpi/power.c
--- a/xen/arch/x86/acpi/power.c Thu Apr 15 11:36:20 2010 +0100
+++ b/xen/arch/x86/acpi/power.c Thu Apr 15 12:21:00 2010 +0100
@@ -82,16 +82,12 @@ static void freeze_domains(void)
     rcu_read_lock(&domlist_read_lock);
     for_each_domain ( d )
     {
-        switch ( d->domain_id )
+        for_each_vcpu ( d, v )
         {
-        case 0:
-            for_each_vcpu ( d, v )
-                if ( v != current )
-                    vcpu_pause(v);
-            break;
-        default:
-            domain_pause(d);
-            break;
+            if ( v != current )
+                vcpu_pause(v);
+            else
+                vcpu_pause_nosync(v);
         }
     }
     rcu_read_unlock(&domlist_read_lock);
@@ -105,17 +101,8 @@ static void thaw_domains(void)
     rcu_read_lock(&domlist_read_lock);
     for_each_domain ( d )
     {
-        switch ( d->domain_id )
-        {
-        case 0:
-            for_each_vcpu ( d, v )
-                if ( v != current )
-                    vcpu_unpause(v);
-            break;
-        default:
-            domain_unpause(d);
-            break;
-        }
+        for_each_vcpu ( d, v )
+            vcpu_unpause(v);
     }
     rcu_read_unlock(&domlist_read_lock);
 }

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