linux-kernel - Re: [PATCH 3/3] virt: vbox: Use fallthrough;

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Date:   Fri, 13 Mar 2020 11:45:57 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Joe Perches <joe@...ches.com>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] virt: vbox: Use fallthrough;

Hi,

On 3/12/20 8:17 PM, Joe Perches wrote:
> Convert the various uses of fallthrough comments to fallthrough;
> 
> Done via script
> Link: https://lore.kernel.org/lkml/b56602fcf79f849e733e7b521bb0e17895d390fa.1582230379.git.joe@perches.com/
> 
> And by hand:
> 
> drivers/virt/vboxguest/vboxguest_core.c has a fallthrough comment outside
> of an #ifdef block that causes gcc to emit a warning if converted in-place.
> 
> So move the new fallthrough; inside the containing #ifdef/#endif too.
> 
> Signed-off-by: Joe Perches <joe@...ches.com>

Patch looks good to me:

Acked-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans


> ---
>   drivers/virt/vboxguest/vboxguest_core.c  | 2 +-
>   drivers/virt/vboxguest/vboxguest_utils.c | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/virt/vboxguest/vboxguest_core.c b/drivers/virt/vboxguest/vboxguest_core.c
> index d823d5..b690a8 100644
> --- a/drivers/virt/vboxguest/vboxguest_core.c
> +++ b/drivers/virt/vboxguest/vboxguest_core.c
> @@ -1553,8 +1553,8 @@ 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;
> +		fallthrough;
>   #endif
> -		/* Fall through */
>   	case VBG_IOCTL_HGCM_CALL(0):
>   		return vbg_ioctl_hgcm_call(gdev, session, f32bit, data);
>   	case VBG_IOCTL_LOG(0):
> diff --git a/drivers/virt/vboxguest/vboxguest_utils.c b/drivers/virt/vboxguest/vboxguest_utils.c
> index 50920b..739618 100644
> --- a/drivers/virt/vboxguest/vboxguest_utils.c
> +++ b/drivers/virt/vboxguest/vboxguest_utils.c
> @@ -311,7 +311,7 @@ static u32 hgcm_call_linear_addr_type_to_pagelist_flags(
>   	switch (type) {
>   	default:
>   		WARN_ON(1);
> -		/* Fall through */
> +		fallthrough;
>   	case VMMDEV_HGCM_PARM_TYPE_LINADDR:
>   	case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
>   		return VMMDEV_HGCM_F_PARM_DIRECTION_BOTH;
>