Re: [PATCH] virt: vbox: Mark expected switch fall-through

From: Hans de Goede
Date: Tue Feb 26 2019 - 16:04:37 EST


Hi,

On 26-02-19 20:23, Gustavo A. R. Silva wrote:
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/virt/vboxguest/vboxguest_core.c: In function âvbg_core_ioctlâ:
drivers/virt/vboxguest/vboxguest_core.c:1486:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
f32bit = true;
~~~~~~~^~~~~~
drivers/virt/vboxguest/vboxguest_core.c:1489:2: note: here
case VBG_IOCTL_HGCM_CALL(0):
^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>

Thank you the patch, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Regards,

Hans



---
drivers/virt/vboxguest/vboxguest_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virt/vboxguest/vboxguest_core.c b/drivers/virt/vboxguest/vboxguest_core.c
index 1475ed5ffcde..df7d09409efe 100644
--- a/drivers/virt/vboxguest/vboxguest_core.c
+++ b/drivers/virt/vboxguest/vboxguest_core.c
@@ -1484,8 +1484,8 @@ int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
#ifdef CONFIG_COMPAT
case VBG_IOCTL_HGCM_CALL_32(0):
f32bit = true;
- /* Fall through */
#endif
+ /* Fall through */
case VBG_IOCTL_HGCM_CALL(0):
return vbg_ioctl_hgcm_call(gdev, session, f32bit, data);
case VBG_IOCTL_LOG(0):