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SubjectRe: [PATCH] watchdog: Use fallthrough pseudo-keyword
From
Date
On 7/7/20 10:11 AM, Gustavo A. R. Silva wrote:
> Replace the existing /* fall through */ comments and its variants with
> the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
> fall-through markings when it is the case.
>
> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through
>
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
> drivers/watchdog/advantechwdt.c | 2 +-
> drivers/watchdog/alim1535_wdt.c | 2 +-
> drivers/watchdog/alim7101_wdt.c | 2 +-
> drivers/watchdog/ar7_wdt.c | 3 +--
> drivers/watchdog/ath79_wdt.c | 2 +-
> drivers/watchdog/eurotechwdt.c | 2 +-
> drivers/watchdog/f71808e_wdt.c | 4 ++--
> drivers/watchdog/gef_wdt.c | 2 +-
> drivers/watchdog/geodewdt.c | 2 +-
> drivers/watchdog/ib700wdt.c | 2 +-
> drivers/watchdog/it8712f_wdt.c | 2 +-
> drivers/watchdog/ixp4xx_wdt.c | 2 +-
> drivers/watchdog/m54xx_wdt.c | 2 +-
> drivers/watchdog/machzwd.c | 2 +-
> drivers/watchdog/mv64x60_wdt.c | 2 +-
> drivers/watchdog/nv_tco.c | 2 +-
> drivers/watchdog/pc87413_wdt.c | 2 +-
> drivers/watchdog/pcwd.c | 2 +-
> drivers/watchdog/pcwd_pci.c | 2 +-
> drivers/watchdog/pcwd_usb.c | 2 +-
> drivers/watchdog/rc32434_wdt.c | 2 +-
> drivers/watchdog/riowd.c | 2 +-
> drivers/watchdog/sa1100_wdt.c | 2 +-
> drivers/watchdog/sb_wdog.c | 2 +-
> drivers/watchdog/sbc60xxwdt.c | 2 +-
> drivers/watchdog/sbc7240_wdt.c | 2 +-
> drivers/watchdog/sbc_fitpc2_wdt.c | 2 +-
> drivers/watchdog/sc520_wdt.c | 2 +-
> drivers/watchdog/sch311x_wdt.c | 2 +-
> drivers/watchdog/smsc37b787_wdt.c | 2 +-
> drivers/watchdog/w83877f_wdt.c | 2 +-
> drivers/watchdog/w83977f_wdt.c | 2 +-
> drivers/watchdog/wafer5823wdt.c | 2 +-
> drivers/watchdog/watchdog_dev.c | 2 +-
> drivers/watchdog/wdt.c | 2 +-
> drivers/watchdog/wdt285.c | 2 +-
> drivers/watchdog/wdt977.c | 2 +-
> drivers/watchdog/wdt_pci.c | 2 +-
> 38 files changed, 39 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/watchdog/advantechwdt.c b/drivers/watchdog/advantechwdt.c
> index 0e4c18a2aa42..554fe85da50e 100644
> --- a/drivers/watchdog/advantechwdt.c
> +++ b/drivers/watchdog/advantechwdt.c
> @@ -177,7 +177,7 @@ static long advwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> if (advwdt_set_heartbeat(new_timeout))
> return -EINVAL;
> advwdt_ping();
> - /* fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> diff --git a/drivers/watchdog/alim1535_wdt.c b/drivers/watchdog/alim1535_wdt.c
> index 42338c7d4540..bfb9a91ca1df 100644
> --- a/drivers/watchdog/alim1535_wdt.c
> +++ b/drivers/watchdog/alim1535_wdt.c
> @@ -220,7 +220,7 @@ static long ali_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> return -EINVAL;
> ali_keepalive();
> }
> - /* fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> diff --git a/drivers/watchdog/alim7101_wdt.c b/drivers/watchdog/alim7101_wdt.c
> index 5af0358f4390..4ff7f5afb7aa 100644
> --- a/drivers/watchdog/alim7101_wdt.c
> +++ b/drivers/watchdog/alim7101_wdt.c
> @@ -279,7 +279,7 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> timeout = new_timeout;
> wdt_keepalive();
> }
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> diff --git a/drivers/watchdog/ar7_wdt.c b/drivers/watchdog/ar7_wdt.c
> index c087027ffd5d..ff37dc91057d 100644
> --- a/drivers/watchdog/ar7_wdt.c
> +++ b/drivers/watchdog/ar7_wdt.c
> @@ -235,8 +235,7 @@ static long ar7_wdt_ioctl(struct file *file,
> ar7_wdt_update_margin(new_margin);
> ar7_wdt_kick(1);
> spin_unlock(&wdt_lock);
> - /* Fall through */
> -
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> if (put_user(margin, (int *)arg))
> return -EFAULT;
> diff --git a/drivers/watchdog/ath79_wdt.c b/drivers/watchdog/ath79_wdt.c
> index d6dff97c280b..0f18f06a21b6 100644
> --- a/drivers/watchdog/ath79_wdt.c
> +++ b/drivers/watchdog/ath79_wdt.c
> @@ -215,8 +215,8 @@ static long ath79_wdt_ioctl(struct file *file, unsigned int cmd,
> err = ath79_wdt_set_timeout(t);
> if (err)
> break;
> + fallthrough;
>
> - /* fallthrough */
> case WDIOC_GETTIMEOUT:
> err = put_user(timeout, p);
> break;
> diff --git a/drivers/watchdog/eurotechwdt.c b/drivers/watchdog/eurotechwdt.c
> index f5ffa7be066e..2418ebb707bd 100644
> --- a/drivers/watchdog/eurotechwdt.c
> +++ b/drivers/watchdog/eurotechwdt.c
> @@ -286,7 +286,7 @@ static long eurwdt_ioctl(struct file *file,
> eurwdt_timeout = time;
> eurwdt_set_timeout(time);
> spin_unlock(&eurwdt_lock);
> - /* fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(eurwdt_timeout, p);
> diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
> index a3c44d75d80e..d7a00e678b9a 100644
> --- a/drivers/watchdog/f71808e_wdt.c
> +++ b/drivers/watchdog/f71808e_wdt.c
> @@ -629,7 +629,7 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd,
>
> if (new_options & WDIOS_ENABLECARD)
> return watchdog_start();
> - /* fall through */
> + fallthrough;
>
> case WDIOC_KEEPALIVE:
> watchdog_keepalive();
> @@ -643,7 +643,7 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd,
> return -EINVAL;
>
> watchdog_keepalive();
> - /* fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(watchdog.timeout, uarg.i);
> diff --git a/drivers/watchdog/gef_wdt.c b/drivers/watchdog/gef_wdt.c
> index f6541d1b65e3..df5406aa7d25 100644
> --- a/drivers/watchdog/gef_wdt.c
> +++ b/drivers/watchdog/gef_wdt.c
> @@ -201,7 +201,7 @@ static long gef_wdt_ioctl(struct file *file, unsigned int cmd,
> if (get_user(timeout, (int __user *)argp))
> return -EFAULT;
> gef_wdt_set_timeout(timeout);
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> if (put_user(gef_wdt_timeout, (int __user *)argp))
> diff --git a/drivers/watchdog/geodewdt.c b/drivers/watchdog/geodewdt.c
> index 9914a4283cb2..83418924e30a 100644
> --- a/drivers/watchdog/geodewdt.c
> +++ b/drivers/watchdog/geodewdt.c
> @@ -185,7 +185,7 @@ static long geodewdt_ioctl(struct file *file, unsigned int cmd,
>
> if (geodewdt_set_heartbeat(interval))
> return -EINVAL;
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
>
> diff --git a/drivers/watchdog/ib700wdt.c b/drivers/watchdog/ib700wdt.c
> index 2b65ea9451d1..a0ddedc362fc 100644
> --- a/drivers/watchdog/ib700wdt.c
> +++ b/drivers/watchdog/ib700wdt.c
> @@ -214,7 +214,7 @@ static long ibwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> if (ibwdt_set_heartbeat(new_margin))
> return -EINVAL;
> ibwdt_ping();
> - /* fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
> index 2fed40d14007..9b89d2f09568 100644
> --- a/drivers/watchdog/it8712f_wdt.c
> +++ b/drivers/watchdog/it8712f_wdt.c
> @@ -303,7 +303,7 @@ static long it8712f_wdt_ioctl(struct file *file, unsigned int cmd,
>
> superio_exit();
> it8712f_wdt_ping();
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> if (put_user(margin, p))
> return -EFAULT;
> diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c
> index 09886616fd21..aae29dcfaf11 100644
> --- a/drivers/watchdog/ixp4xx_wdt.c
> +++ b/drivers/watchdog/ixp4xx_wdt.c
> @@ -136,7 +136,7 @@ static long ixp4xx_wdt_ioctl(struct file *file, unsigned int cmd,
>
> heartbeat = time;
> wdt_enable();
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> ret = put_user(heartbeat, (int *)arg);
> diff --git a/drivers/watchdog/m54xx_wdt.c b/drivers/watchdog/m54xx_wdt.c
> index 60ed6252e5f4..f388a769dbd3 100644
> --- a/drivers/watchdog/m54xx_wdt.c
> +++ b/drivers/watchdog/m54xx_wdt.c
> @@ -155,7 +155,7 @@ static long m54xx_wdt_ioctl(struct file *file, unsigned int cmd,
>
> heartbeat = time;
> wdt_enable();
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> ret = put_user(heartbeat, (int *)arg);
> diff --git a/drivers/watchdog/machzwd.c b/drivers/watchdog/machzwd.c
> index 80ff94688487..743377c5b173 100644
> --- a/drivers/watchdog/machzwd.c
> +++ b/drivers/watchdog/machzwd.c
> @@ -171,7 +171,7 @@ static inline void zf_set_timer(unsigned short new, unsigned char n)
> switch (n) {
> case WD1:
> zf_writew(COUNTER_1, new);
> - /* fall through */
> + fallthrough;
> case WD2:
> zf_writeb(COUNTER_2, new > 0xff ? 0xff : new);
> default:
> diff --git a/drivers/watchdog/mv64x60_wdt.c b/drivers/watchdog/mv64x60_wdt.c
> index 0bc72dd69b70..894aa63488d3 100644
> --- a/drivers/watchdog/mv64x60_wdt.c
> +++ b/drivers/watchdog/mv64x60_wdt.c
> @@ -222,7 +222,7 @@ static long mv64x60_wdt_ioctl(struct file *file,
> if (get_user(timeout, (int __user *)argp))
> return -EFAULT;
> mv64x60_wdt_set_timeout(timeout);
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> if (put_user(mv64x60_wdt_timeout, (int __user *)argp))
> diff --git a/drivers/watchdog/nv_tco.c b/drivers/watchdog/nv_tco.c
> index d7a560e348d5..d15ad8583a59 100644
> --- a/drivers/watchdog/nv_tco.c
> +++ b/drivers/watchdog/nv_tco.c
> @@ -250,7 +250,7 @@ static long nv_tco_ioctl(struct file *file, unsigned int cmd,
> if (tco_timer_set_heartbeat(new_heartbeat))
> return -EINVAL;
> tco_timer_keepalive();
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(heartbeat, p);
> default:
> diff --git a/drivers/watchdog/pc87413_wdt.c b/drivers/watchdog/pc87413_wdt.c
> index 73fbfc99083b..2d4504302c9e 100644
> --- a/drivers/watchdog/pc87413_wdt.c
> +++ b/drivers/watchdog/pc87413_wdt.c
> @@ -433,7 +433,7 @@ static long pc87413_ioctl(struct file *file, unsigned int cmd,
> return -EINVAL;
> timeout = new_timeout;
> pc87413_refresh();
> - /* fall through - and return the new timeout... */
> + fallthrough; /* and return the new timeout */
> case WDIOC_GETTIMEOUT:
> new_timeout = timeout * 60;
> return put_user(new_timeout, uarg.i);
> diff --git a/drivers/watchdog/pcwd.c b/drivers/watchdog/pcwd.c
> index 7a0587fdc52c..e86fa7f8351d 100644
> --- a/drivers/watchdog/pcwd.c
> +++ b/drivers/watchdog/pcwd.c
> @@ -651,7 +651,7 @@ static long pcwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> return -EINVAL;
>
> pcwd_keepalive();
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(heartbeat, argp);
> diff --git a/drivers/watchdog/pcwd_pci.c b/drivers/watchdog/pcwd_pci.c
> index 81508a42a90c..54d86fcb1837 100644
> --- a/drivers/watchdog/pcwd_pci.c
> +++ b/drivers/watchdog/pcwd_pci.c
> @@ -542,7 +542,7 @@ static long pcipcwd_ioctl(struct file *file, unsigned int cmd,
>
> pcipcwd_keepalive();
> }
> - /* fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(heartbeat, p);
> diff --git a/drivers/watchdog/pcwd_usb.c b/drivers/watchdog/pcwd_usb.c
> index 2f44af1831d0..79efca47cebb 100644
> --- a/drivers/watchdog/pcwd_usb.c
> +++ b/drivers/watchdog/pcwd_usb.c
> @@ -452,7 +452,7 @@ static long usb_pcwd_ioctl(struct file *file, unsigned int cmd,
>
> usb_pcwd_keepalive(usb_pcwd_device);
> }
> - /* fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(heartbeat, p);
> diff --git a/drivers/watchdog/rc32434_wdt.c b/drivers/watchdog/rc32434_wdt.c
> index aee3c2efd565..e74802f3a32e 100644
> --- a/drivers/watchdog/rc32434_wdt.c
> +++ b/drivers/watchdog/rc32434_wdt.c
> @@ -230,7 +230,7 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
> return -EFAULT;
> if (rc32434_wdt_set(new_timeout))
> return -EINVAL;
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return copy_to_user(argp, &timeout, sizeof(int)) ? -EFAULT : 0;
> default:
> diff --git a/drivers/watchdog/riowd.c b/drivers/watchdog/riowd.c
> index 1b9a6dc8f982..7008596a575f 100644
> --- a/drivers/watchdog/riowd.c
> +++ b/drivers/watchdog/riowd.c
> @@ -134,7 +134,7 @@ static long riowd_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> return -EINVAL;
> riowd_timeout = (new_margin + 59) / 60;
> riowd_writereg(p, riowd_timeout, WDTO_INDEX);
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(riowd_timeout * 60, (int __user *)argp);
> diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c
> index 9b93be00109f..27846c6bdfb0 100644
> --- a/drivers/watchdog/sa1100_wdt.c
> +++ b/drivers/watchdog/sa1100_wdt.c
> @@ -127,7 +127,7 @@ static long sa1100dog_ioctl(struct file *file, unsigned int cmd,
>
> pre_margin = oscr_freq * time;
> writel_relaxed(readl_relaxed(OSCR) + pre_margin, OSMR3);
> - /*fall through*/
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> ret = put_user(pre_margin / oscr_freq, p);
> diff --git a/drivers/watchdog/sb_wdog.c b/drivers/watchdog/sb_wdog.c
> index da2dad00d473..504be461f992 100644
> --- a/drivers/watchdog/sb_wdog.c
> +++ b/drivers/watchdog/sb_wdog.c
> @@ -202,7 +202,7 @@ static long sbwdog_ioctl(struct file *file, unsigned int cmd,
> timeout = time;
> sbwdog_set(user_dog, timeout);
> sbwdog_pet(user_dog);
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> /*
> diff --git a/drivers/watchdog/sbc60xxwdt.c b/drivers/watchdog/sbc60xxwdt.c
> index f2cbe6d880a8..a947a63fb44a 100644
> --- a/drivers/watchdog/sbc60xxwdt.c
> +++ b/drivers/watchdog/sbc60xxwdt.c
> @@ -265,7 +265,7 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> timeout = new_timeout;
> wdt_keepalive();
> }
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> diff --git a/drivers/watchdog/sbc7240_wdt.c b/drivers/watchdog/sbc7240_wdt.c
> index 520b8dd77ed4..d640b26e18a6 100644
> --- a/drivers/watchdog/sbc7240_wdt.c
> +++ b/drivers/watchdog/sbc7240_wdt.c
> @@ -195,7 +195,7 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> if (wdt_set_timeout(new_timeout))
> return -EINVAL;
> }
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, (int __user *)arg);
> default:
> diff --git a/drivers/watchdog/sbc_fitpc2_wdt.c b/drivers/watchdog/sbc_fitpc2_wdt.c
> index 1b20b33879c4..04483d6453d6 100644
> --- a/drivers/watchdog/sbc_fitpc2_wdt.c
> +++ b/drivers/watchdog/sbc_fitpc2_wdt.c
> @@ -154,7 +154,7 @@ static long fitpc2_wdt_ioctl(struct file *file, unsigned int cmd,
>
> margin = time;
> wdt_enable();
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> ret = put_user(margin, (int *)arg);
> diff --git a/drivers/watchdog/sc520_wdt.c b/drivers/watchdog/sc520_wdt.c
> index fbe79bcc9297..e66e6b905964 100644
> --- a/drivers/watchdog/sc520_wdt.c
> +++ b/drivers/watchdog/sc520_wdt.c
> @@ -321,7 +321,7 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>
> wdt_keepalive();
> }
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> diff --git a/drivers/watchdog/sch311x_wdt.c b/drivers/watchdog/sch311x_wdt.c
> index 83949a385f62..d8b77fe10eba 100644
> --- a/drivers/watchdog/sch311x_wdt.c
> +++ b/drivers/watchdog/sch311x_wdt.c
> @@ -295,7 +295,7 @@ static long sch311x_wdt_ioctl(struct file *file, unsigned int cmd,
> if (sch311x_wdt_set_heartbeat(new_timeout))
> return -EINVAL;
> sch311x_wdt_keepalive();
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> diff --git a/drivers/watchdog/smsc37b787_wdt.c b/drivers/watchdog/smsc37b787_wdt.c
> index 43de56acd767..7463df479d11 100644
> --- a/drivers/watchdog/smsc37b787_wdt.c
> +++ b/drivers/watchdog/smsc37b787_wdt.c
> @@ -474,7 +474,7 @@ static long wb_smsc_wdt_ioctl(struct file *file,
> return -EINVAL;
> timeout = new_timeout;
> wb_smsc_wdt_set_timeout(timeout);
> - /* fall through - and return the new timeout... */
> + fallthrough; /* and return the new timeout */
> case WDIOC_GETTIMEOUT:
> new_timeout = timeout;
> if (unit == UNIT_MINUTE)
> diff --git a/drivers/watchdog/w83877f_wdt.c b/drivers/watchdog/w83877f_wdt.c
> index 6b3b667e6f23..5772cc5d3780 100644
> --- a/drivers/watchdog/w83877f_wdt.c
> +++ b/drivers/watchdog/w83877f_wdt.c
> @@ -289,7 +289,7 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> timeout = new_timeout;
> wdt_keepalive();
> }
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c
> index 5212e68c6b01..fd64ae77780a 100644
> --- a/drivers/watchdog/w83977f_wdt.c
> +++ b/drivers/watchdog/w83977f_wdt.c
> @@ -422,7 +422,7 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> return -EINVAL;
>
> wdt_keepalive();
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, uarg.i);
> diff --git a/drivers/watchdog/wafer5823wdt.c b/drivers/watchdog/wafer5823wdt.c
> index a6925847f76f..a8a1ed215e1e 100644
> --- a/drivers/watchdog/wafer5823wdt.c
> +++ b/drivers/watchdog/wafer5823wdt.c
> @@ -174,7 +174,7 @@ static long wafwdt_ioctl(struct file *file, unsigned int cmd,
> timeout = new_timeout;
> wafwdt_stop();
> wafwdt_start();
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
>
> diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
> index 7e4cd34a8c20..0c9c50f0f5eb 100644
> --- a/drivers/watchdog/watchdog_dev.c
> +++ b/drivers/watchdog/watchdog_dev.c
> @@ -776,7 +776,7 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd,
> err = watchdog_ping(wdd);
> if (err < 0)
> break;
> - /* fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> /* timeout == 0 means that we don't know the timeout */
> if (wdd->timeout == 0) {
> diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c
> index f9054cb0f8e2..a9e40b5c633e 100644
> --- a/drivers/watchdog/wdt.c
> +++ b/drivers/watchdog/wdt.c
> @@ -389,7 +389,7 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> if (wdt_set_heartbeat(new_heartbeat))
> return -EINVAL;
> wdt_ping();
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(heartbeat, p);
> default:
> diff --git a/drivers/watchdog/wdt285.c b/drivers/watchdog/wdt285.c
> index e60993d0767e..110249e5f642 100644
> --- a/drivers/watchdog/wdt285.c
> +++ b/drivers/watchdog/wdt285.c
> @@ -168,7 +168,7 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd,
> soft_margin = new_margin;
> reload = soft_margin * (mem_fclk_21285 / 256);
> watchdog_ping();
> - /* Fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> ret = put_user(soft_margin, int_arg);
> break;
> diff --git a/drivers/watchdog/wdt977.c b/drivers/watchdog/wdt977.c
> index 066a4fb4d75b..c9b8e863f70f 100644
> --- a/drivers/watchdog/wdt977.c
> +++ b/drivers/watchdog/wdt977.c
> @@ -398,7 +398,7 @@ static long wdt977_ioctl(struct file *file, unsigned int cmd,
> return -EINVAL;
>
> wdt977_keepalive();
> - /* Fall through */
> + fallthrough;
>
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, uarg.i);
> diff --git a/drivers/watchdog/wdt_pci.c b/drivers/watchdog/wdt_pci.c
> index e528024faa41..c3254ba5ace6 100644
> --- a/drivers/watchdog/wdt_pci.c
> +++ b/drivers/watchdog/wdt_pci.c
> @@ -426,7 +426,7 @@ static long wdtpci_ioctl(struct file *file, unsigned int cmd,
> if (wdtpci_set_heartbeat(new_heartbeat))
> return -EINVAL;
> wdtpci_ping();
> - /* fall through */
> + fallthrough;
> case WDIOC_GETTIMEOUT:
> return put_user(heartbeat, p);
> default:
>

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