memory: create function to set a single dirty bit

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NOrit Wasserman <owasserm@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

cputlb.c

@@ -122,7 +122,7 @@ void tlb_protect_code(ram_addr_t ram_addr)
 void tlb_unprotect_code_phys(CPUArchState *env, ram_addr_t ram_addr,
                              target_ulong vaddr)
 {
-    cpu_physical_memory_set_dirty_flags(ram_addr, CODE_DIRTY_FLAG);
+    cpu_physical_memory_set_dirty_flag(ram_addr, CODE_DIRTY_FLAG);
 }
 
 static bool tlb_is_dirty_ram(CPUTLBEntry *tlbe)

include/exec/memory-internal.h

@@ -76,6 +76,12 @@ static inline void cpu_physical_memory_set_dirty_flags(ram_addr_t addr,
     ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flags;
 }
 
+static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
+                                                      int dirty_flag)
+{
+    ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flag;
+}
+
 static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
 {
     cpu_physical_memory_set_dirty_flags(addr, 0xff);