char: use a const CharDriver

No need to allocate & copy fields, let's use static const struct instead.

Add an alias field to the CharDriver structure to cover the cases where
we previously registered a driver twice under two names.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/backends/testdev.c b/backends/testdev.c
index 60156e3..cd25094 100644
--- a/backends/testdev.c
+++ b/backends/testdev.c
@@ -130,8 +130,11 @@ static CharDriverState *chr_testdev_init(const char *id,
 
 static void register_types(void)
 {
-    register_char_driver("testdev", CHARDEV_BACKEND_KIND_TESTDEV, NULL,
-                         chr_testdev_init);
+    static const CharDriver driver = {
+        .kind = CHARDEV_BACKEND_KIND_TESTDEV,
+        .create = chr_testdev_init,
+    };
+    register_char_driver(&driver);
 }
 
 type_init(register_types);