From 134ab69ffdfb7e45a0be385595036d0427928306 Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Fri, 23 Aug 2019 06:14:28 +0100
Subject: [PATCH 1/5] memory: Refactor memory_region_clear_coalescing
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RH-Author: Peter Xu <peterx@redhat.com>
Message-id: <20190823061431.31759-2-peterx@redhat.com>
Patchwork-id: 90134
O-Subject: [RHEL-AV-8.1 qemu-kvm PATCH 1/4] memory: Refactor memory_region_clear_coalescing
Bugzilla: 1743142
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Auger Eric <eric.auger@redhat.com>
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Removing the update variable and quit earlier if the memory region has
no coalesced range.  This prepares for the next patch.

Fixes: 3ac7d43a6fbb5d4a3
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20190820141328.10009-4-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 9c1aa1c235c770d84462d482460a96e957e95b9c)
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 memory.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/memory.c b/memory.c
index 5d8c9a9..9f40742 100644
--- a/memory.c
+++ b/memory.c
@@ -2276,7 +2276,10 @@ void memory_region_add_coalescing(MemoryRegion *mr,
 void memory_region_clear_coalescing(MemoryRegion *mr)
 {
     CoalescedMemoryRange *cmr;
-    bool updated = false;
+
+    if (QTAILQ_EMPTY(&mr->coalesced)) {
+        return;
+    }
 
     qemu_flush_coalesced_mmio_buffer();
     mr->flush_coalesced_mmio = false;
@@ -2285,12 +2288,9 @@ void memory_region_clear_coalescing(MemoryRegion *mr)
         cmr = QTAILQ_FIRST(&mr->coalesced);
         QTAILQ_REMOVE(&mr->coalesced, cmr, link);
         g_free(cmr);
-        updated = true;
     }
 
-    if (updated) {
-        memory_region_update_coalesced_range(mr);
-    }
+    memory_region_update_coalesced_range(mr);
 }
 
 void memory_region_set_flush_coalesced(MemoryRegion *mr)
-- 
1.8.3.1