commit 2f3a2bb15e665f23c885985226c4147db4ea35db
author Eduardo Habkost <ehabkost@redhat.com> Fri Nov 06 20:11:21 2015 -0200
committer Paolo Bonzini <pbonzini@redhat.com> Thu Dec 17 15:24:34 2015 +0100
tree 3eafedd886c07a5ed8b39e683328592e1af5ca62
parent fc3e7665d7fe1b2f842441d250d7afec26b8a910

exec: Remove unnecessary RAM_FILE flag

The only code that sets RAMBlock.fd is file_ram_alloc(), and the only
code that calls file_ram_alloc() sets the RAM_FILE flag. That means the
flag is always set when RAMBlock.fd >= 0, and the munmap() call at
reclaim_ramblock() is dead code that never runs.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1446847881-9385-1-git-send-email-ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

exec.c

diff --git a/exec.c b/exec.c
index d12cd42..53a4b8c 100644
--- a/exec.c
+++ b/exec.c
@@ -88,9 +88,6 @@
  */
 #define RAM_RESIZEABLE (1 << 2)
 
-/* RAM is backed by an mmapped file.
- */
-#define RAM_FILE (1 << 3)
 #endif
 
 struct CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
@@ -1601,7 +1598,6 @@
     new_block->used_length = size;
     new_block->max_length = size;
     new_block->flags = share ? RAM_SHARED : 0;
-    new_block->flags |= RAM_FILE;
     new_block->host = file_ram_alloc(new_block, size,
                                      mem_path, errp);
     if (!new_block->host) {
@@ -1684,11 +1680,7 @@
         xen_invalidate_map_cache_entry(block->host);
 #ifndef _WIN32
     } else if (block->fd >= 0) {
-        if (block->flags & RAM_FILE) {
-            qemu_ram_munmap(block->host, block->max_length);
-        } else {
-            munmap(block->host, block->max_length);
-        }
+        qemu_ram_munmap(block->host, block->max_length);
         close(block->fd);
 #endif
     } else {