When compiling with -Werror=implicit-fallthrough, the compiler currently complains:
../../devel/qemu/block/qcow2-cluster.c: In function ‘cluster_needs_new_alloc’: ../../devel/qemu/block/qcow2-cluster.c:1320:12: error: this statement may fall through [-Werror=implicit-fallthrough=] if (l2_entry & QCOW_OFLAG_COPIED) { ^ ../../devel/qemu/block/qcow2-cluster.c:1323:5: note: here case QCOW2_CLUSTER_UNALLOCATED: ^~~~ It's quite obvious that the fallthrough is intended here, so let's add a comment to silence the compiler warning. Signed-off-by: Thomas Huth <th...@redhat.com> --- block/qcow2-cluster.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 996b3314f4..fcdf7af8e6 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -1320,6 +1320,7 @@ static bool cluster_needs_new_alloc(BlockDriverState *bs, uint64_t l2_entry) if (l2_entry & QCOW_OFLAG_COPIED) { return false; } + /* fallthrough */ case QCOW2_CLUSTER_UNALLOCATED: case QCOW2_CLUSTER_COMPRESSED: case QCOW2_CLUSTER_ZERO_PLAIN: -- 2.18.2