2019-01-14 20:45:02

by Mathieu Malaterre

Subject: [PATCH] mmc: core: annotate implicit fall through

There is a plan to build the kernel with -Wimplicit-fallthrough and
this place in the code produced a warning (W=1).

In this particular case rewrote the comment to start with the string "fall
through", so as to match the regular expression expected by GCC. Truncate
the comment slightly to fit the max line length of 80 characters.

This commit remove the following warning:

drivers/mmc/core/host.c:196:14: warning: this statement may fall through [-Wimplicit-fallthrough=]

Signed-off-by: Mathieu Malaterre <[email protected]>
---
drivers/mmc/core/host.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index f57f5de54206..0052d6fed7c8 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -194,7 +194,7 @@ int mmc_of_parse(struct mmc_host *host)
switch (bus_width) {
case 8:
host->caps |= MMC_CAP_8_BIT_DATA;
- /* Hosts capable of 8-bit transfers can also do 4 bits */
+ /* fall through - Hosts capable of 8-bit can also do 4 bits */
case 4:
host->caps |= MMC_CAP_4_BIT_DATA;
break;
--
2.19.2

2019-01-14 21:30:30

by Gustavo A. R. Silva

Subject: Re: [PATCH] mmc: core: annotate implicit fall through

On 1/14/19 2:42 PM, Mathieu Malaterre wrote:
> There is a plan to build the kernel with -Wimplicit-fallthrough and
> this place in the code produced a warning (W=1).
>
> In this particular case rewrote the comment to start with the string "fall
> through", so as to match the regular expression expected by GCC. Truncate
> the comment slightly to fit the max line length of 80 characters.
>
> This commit remove the following warning:
>
> drivers/mmc/core/host.c:196:14: warning: this statement may fall through [-Wimplicit-fallthrough=]
>
> Signed-off-by: Mathieu Malaterre <[email protected]>

Acked-by: Gustavo A. R. Silva <[email protected]>

Thanks, Mathieu.

> ---
> drivers/mmc/core/host.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index f57f5de54206..0052d6fed7c8 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -194,7 +194,7 @@ int mmc_of_parse(struct mmc_host *host)
> switch (bus_width) {
> case 8:
> host->caps |= MMC_CAP_8_BIT_DATA;
> - /* Hosts capable of 8-bit transfers can also do 4 bits */
> + /* fall through - Hosts capable of 8-bit can also do 4 bits */
> case 4:
> host->caps |= MMC_CAP_4_BIT_DATA;
> break;
>

2019-01-22 07:49:58

by Ulf Hansson

Subject: Re: [PATCH] mmc: core: annotate implicit fall through

On Mon, 14 Jan 2019 at 21:42, Mathieu Malaterre <[email protected]> wrote:
>
> There is a plan to build the kernel with -Wimplicit-fallthrough and
> this place in the code produced a warning (W=1).
>
> In this particular case rewrote the comment to start with the string "fall
> through", so as to match the regular expression expected by GCC. Truncate
> the comment slightly to fit the max line length of 80 characters.
>
> This commit remove the following warning:
>
> drivers/mmc/core/host.c:196:14: warning: this statement may fall through [-Wimplicit-fallthrough=]
>
> Signed-off-by: Mathieu Malaterre <[email protected]>

Applied for next, thanks!

Kind regards
Uffe


> ---
> drivers/mmc/core/host.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index f57f5de54206..0052d6fed7c8 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -194,7 +194,7 @@ int mmc_of_parse(struct mmc_host *host)
> switch (bus_width) {
> case 8:
> host->caps |= MMC_CAP_8_BIT_DATA;
> - /* Hosts capable of 8-bit transfers can also do 4 bits */
> + /* fall through - Hosts capable of 8-bit can also do 4 bits */
> case 4:
> host->caps |= MMC_CAP_4_BIT_DATA;
> break;
> --
> 2.19.2
>