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>
---
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
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 <thuth@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: >
On 08/09/2020 10.43, Philippe Mathieu-Daudé wrote: > 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? Quite a bit, I think. I'm fixing it step by step... Thomas
Am 08.09.2020 um 09:00 hat Thomas Huth geschrieben: > 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> Thanks, applied to the block branch. Kevin
© 2016 - 2024 Red Hat, Inc.