[PATCH 2/2] block: Make more BlockDriver definitions static

[Kevin Wolf <kwolf@redhat.com>]

Most block driver implementations don't have any reason for their
BlockDriver to be public. The only exceptions are bdrv_file, bdrv_raw
and bdrv_qcow2, which are actually used in other source files.

Make all other BlockDriver definitions static if they aren't yet.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/copy-before-write.c | 2 +-
 block/preallocate.c       | 2 +-
 block/snapshot-access.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/block/copy-before-write.c b/block/copy-before-write.c
index b866e42271..9a0e2b69d9 100644
--- a/block/copy-before-write.c
+++ b/block/copy-before-write.c
@@ -503,7 +503,7 @@ static void cbw_close(BlockDriverState *bs)
     s->bcs = NULL;
 }
 
-BlockDriver bdrv_cbw_filter = {
+static BlockDriver bdrv_cbw_filter = {
     .format_name = "copy-before-write",
     .instance_size = sizeof(BDRVCopyBeforeWriteState),
 
diff --git a/block/preallocate.c b/block/preallocate.c
index 4d82125036..3d0f621003 100644
--- a/block/preallocate.c
+++ b/block/preallocate.c
@@ -535,7 +535,7 @@ static void preallocate_child_perm(BlockDriverState *bs, BdrvChild *c,
     }
 }
 
-BlockDriver bdrv_preallocate_filter = {
+static BlockDriver bdrv_preallocate_filter = {
     .format_name = "preallocate",
     .instance_size = sizeof(BDRVPreallocateState),
 
diff --git a/block/snapshot-access.c b/block/snapshot-access.c
index 67ea339da9..8d4e8932b8 100644
--- a/block/snapshot-access.c
+++ b/block/snapshot-access.c
@@ -108,7 +108,7 @@ static void snapshot_access_child_perm(BlockDriverState *bs, BdrvChild *c,
     *nshared = BLK_PERM_ALL;
 }
 
-BlockDriver bdrv_snapshot_access_drv = {
+static BlockDriver bdrv_snapshot_access_drv = {
     .format_name = "snapshot-access",
 
     .bdrv_open                  = snapshot_access_open,
-- 
2.41.0