block: Make bdrv_{copy_on_read,crypto_luks,replication} static

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block/copy-on-read.c

@@ -134,7 +134,7 @@ static bool cor_recurse_is_first_non_filter(BlockDriverState *bs,
 }
 
 
-BlockDriver bdrv_copy_on_read = {
+static BlockDriver bdrv_copy_on_read = {
     .format_name                        = "copy-on-read",
 
     .bdrv_open                          = cor_open,

block/crypto.c

@@ -625,7 +625,7 @@ static const char *const block_crypto_strong_runtime_opts[] = {
     NULL
 };
 
-BlockDriver bdrv_crypto_luks = {
+static BlockDriver bdrv_crypto_luks = {
     .format_name        = "luks",
     .instance_size      = sizeof(BlockCrypto),
     .bdrv_probe         = block_crypto_probe_luks,

block/replication.c

@@ -682,7 +682,7 @@ static const char *const replication_strong_runtime_opts[] = {
     NULL
 };
 
-BlockDriver bdrv_replication = {
+static BlockDriver bdrv_replication = {
     .format_name                = "replication",
     .instance_size              = sizeof(BDRVReplicationState),