minor shmem clean-ups

Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

docs/formatdomain.html.in

@@ -5587,7 +5587,7 @@ qemu-kvm -net nic,model=? /dev/null
     <p>
       A shared memory device allows to share a memory region between
       different virtual machines and the host.
-      <span class="since">Since 1.2.9, QEMU and KVM only</span>
+      <span class="since">Since 1.2.10, QEMU and KVM only</span>
     </p>
 
 <pre>

src/conf/domain_conf.c

@@ -17603,7 +17603,7 @@ virDomainShmemDefFormat(virBufferPtr buf,
                         virDomainShmemDefPtr def,
                         unsigned int flags)
 {
-    virBufferAsprintf(buf, "<shmem name='%s'", def->name);
+    virBufferEscapeString(buf, "<shmem name='%s'", def->name);
 
     if (!def->size &&
         !def->server.enabled &&
@@ -17618,8 +17618,7 @@ virDomainShmemDefFormat(virBufferPtr buf,
     virBufferAdjustIndent(buf, 2);
 
     if (def->size)
-        virBufferAsprintf(buf, "<size unit='M'>%llu</size>\n",
-                          VIR_DIV_UP(def->size, 1024 * 1024));
+        virBufferAsprintf(buf, "<size unit='M'>%llu</size>\n", def->size >> 20);
 
     if (def->server.enabled) {
         virBufferAddLit(buf, "<server");

src/qemu/qemu_command.c

@@ -7549,7 +7549,7 @@ qemuBuildShmemDevCmd(virCommandPtr cmd,
         /*
          * Thanks to our parsing code, we have a guarantee that the
          * size is power of two and is at least a mebibyte in size.
-         * But because it may change inthe future, the checks are
+         * But because it may change in the future, the checks are
          * doubled in here.
          */
         if (shmem->size & (shmem->size - 1)) {
@@ -7562,8 +7562,7 @@ qemuBuildShmemDevCmd(virCommandPtr cmd,
                            _("shmem size must be at least 1 MiB"));
             goto error;
         }
-        virBufferAsprintf(&buf, ",size=%llum",
-                          VIR_DIV_UP(shmem->size, 1024 * 1024));
+        virBufferAsprintf(&buf, ",size=%llum", shmem->size >> 20);
     }
 
     if (!shmem->server.enabled) {