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block/qcow2-cluster: Add missing "fallthrough" annotation 

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 <thuth@redhat.com>
Message-Id: <20200908070028.193298-1-thuth@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Thomas Huth 2020-09-08 09:00:28 +02:00 committed by Kevin Wolf
parent e5ff22ba9f
commit b9be6faed1
1 changed files with 1 additions and 0 deletions
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block/qcow2-cluster.c
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@ -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: