memory: Move assignment to ram_block to memory_region_init_*

We don't force "const" qualifiers with pointers in QEMU, but it's still
good to keep a clean function interface. Assigning to mr->ram_block is
in this sense ugly - one initializer mutating its owning object's state.

Move it to memory_region_init_*, where mr->ram_addr is assigned.
Reviewed-by: NGonglei <arei.gonglei@huawei.com>
Signed-off-by: NFam Zheng <famz@redhat.com>
Message-Id: <1456813104-25902-3-git-send-email-famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

exec.c

@@ -1711,7 +1711,6 @@ RAMBlock *qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size,
         error_propagate(errp, local_err);
         return NULL;
     }
-    mr->ram_block = new_block;
     return new_block;
 }
 

memory.c

@@ -1277,6 +1277,7 @@ void memory_region_init_ram(MemoryRegion *mr,
     mr->terminates = true;
     mr->destructor = memory_region_destructor_ram;
     ram_block = qemu_ram_alloc(size, mr, errp);
+    mr->ram_block = ram_block;
     mr->ram_addr = ram_block->offset;
     mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
 }
@@ -1298,6 +1299,7 @@ void memory_region_init_resizeable_ram(MemoryRegion *mr,
     mr->terminates = true;
     mr->destructor = memory_region_destructor_ram;
     ram_block = qemu_ram_alloc_resizeable(size, max_size, resized, mr, errp);
+    mr->ram_block = ram_block;
     mr->ram_addr = ram_block->offset;
     mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
 }
@@ -1318,6 +1320,7 @@ void memory_region_init_ram_from_file(MemoryRegion *mr,
     mr->terminates = true;
     mr->destructor = memory_region_destructor_ram;
     ram_block = qemu_ram_alloc_from_file(size, mr, share, path, errp);
+    mr->ram_block = ram_block;
     mr->ram_addr = ram_block->offset;
     mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
 }
@@ -1340,6 +1343,7 @@ void memory_region_init_ram_ptr(MemoryRegion *mr,
     /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL.  */
     assert(ptr != NULL);
     ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
+    mr->ram_block = ram_block;
     mr->ram_addr = ram_block->offset;
 }
 
@@ -1377,6 +1381,7 @@ void memory_region_init_rom_device(MemoryRegion *mr,
     mr->rom_device = true;
     mr->destructor = memory_region_destructor_rom_device;
     ram_block = qemu_ram_alloc(size, mr, errp);
+    mr->ram_block = ram_block;
     mr->ram_addr = ram_block->offset;
 }