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From 4130035f29158309e86b3a1e0f25dbd5bec81af0 Mon Sep 17 00:00:00 2001
From: Juan Quintela <quintela@redhat.com>
Date: Tue, 14 Jan 2014 15:07:38 +0100
Subject: [PATCH 27/40] memory: cpu_physical_memory_clear_dirty_range() now uses bitmap operations

RH-Author: Juan Quintela <quintela@redhat.com>
Message-id: <1389712071-23303-28-git-send-email-quintela@redhat.com>
Patchwork-id: 56685
O-Subject: [RHEL7 qemu-kvm PATCH 27/40] memory: cpu_physical_memory_clear_dirty_range() now uses bitmap operations
Bugzilla: 997559
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Orit Wasserman <owasserm@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert (git) <dgilbert@redhat.com>

We were clearing a range of bits, so use bitmap_clear().

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
(cherry picked from commit a461e389f489e72cdc770ff887512c2c9109bc43)
Signed-off-by: Juan Quintela <quintela@trasno.org>
---
 include/exec/memory-internal.h | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 include/exec/memory-internal.h |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/include/exec/memory-internal.h b/include/exec/memory-internal.h
index 9d32a5a..94bd6af 100644
--- a/include/exec/memory-internal.h
+++ b/include/exec/memory-internal.h
@@ -104,14 +104,12 @@ static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
                                                          ram_addr_t length,
                                                          unsigned client)
 {
-    ram_addr_t addr, end;
+    unsigned long end, page;
 
     assert(client < DIRTY_MEMORY_NUM);
-    end = TARGET_PAGE_ALIGN(start + length);
-    start &= TARGET_PAGE_MASK;
-    for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
-        clear_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
-    }
+    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+    page = start >> TARGET_PAGE_BITS;
+    bitmap_clear(ram_list.dirty_memory[client], page, end - page);
 }
 
 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
-- 
1.7.1