Hi Thomas,
On 9/8/20 9:00 AM, Thomas Huth wrote:
> When compiling with -Werror=implicit-fallthrough, the compiler currently
> complains:
Do you know what is missing to add this in configure::warn_flags?
>
> ../../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 <[email protected]>
> ---
> 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:
>
