diff mbox series

sh: kgdb: Mark expected switch fall-throughs

Message ID 87muc0y3q4.wl-kuninori.morimoto.gx@renesas.com (mailing list archive)
State New, archived
Headers show
Series sh: kgdb: Mark expected switch fall-throughs | expand

Commit Message

Kuninori Morimoto Dec. 10, 2019, 8:39 a.m. UTC 
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

Mark switch cases where we are expecting to fall through.

This patch fixes the following error:

LINUX/arch/sh/kernel/kgdb.c: In function 'kgdb_arch_handle_exception':
LINUX/arch/sh/kernel/kgdb.c:267:6: error: this statement may fall through [-Werror=implicit-fallthrough=]
if (kgdb_hex2long(&ptr, &addr))
^
LINUX/arch/sh/kernel/kgdb.c:269:2: note: here
case 'D':
^~~~

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
---
 arch/sh/kernel/kgdb.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Christophe Leroy Dec. 10, 2019, 8:47 a.m. UTC | #1 
On 12/10/2019 08:39 AM, Kuninori Morimoto wrote:
> 
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> 
> Mark switch cases where we are expecting to fall through.
> 
> This patch fixes the following error:
> 
> LINUX/arch/sh/kernel/kgdb.c: In function 'kgdb_arch_handle_exception':
> LINUX/arch/sh/kernel/kgdb.c:267:6: error: this statement may fall through [-Werror=implicit-fallthrough=]
> if (kgdb_hex2long(&ptr, &addr))
> ^
> LINUX/arch/sh/kernel/kgdb.c:269:2: note: here
> case 'D':
> ^~~~
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> Acked-by: Daniel Thompson <daniel.thompson@linaro.org>

I guess you should also add:

Fixes: ab6e570ba33d ("sh: Generic kgdb stub support.")
Cc: stable@vger.kernel.org

Christophe
Daniel Thompson Dec. 11, 2019, 3:18 p.m. UTC | #2 
On Tue, Dec 10, 2019 at 05:39:00PM +0900, Kuninori Morimoto wrote:
> 
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> 
> Mark switch cases where we are expecting to fall through.
> 
> This patch fixes the following error:
> 
> LINUX/arch/sh/kernel/kgdb.c: In function 'kgdb_arch_handle_exception':
> LINUX/arch/sh/kernel/kgdb.c:267:6: error: this statement may fall through [-Werror=implicit-fallthrough=]
> if (kgdb_hex2long(&ptr, &addr))
> ^
> LINUX/arch/sh/kernel/kgdb.c:269:2: note: here
> case 'D':
> ^~~~
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
> ---
>  arch/sh/kernel/kgdb.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c
> index 6d61f8c..0d5f3c9 100644
> --- a/arch/sh/kernel/kgdb.c
> +++ b/arch/sh/kernel/kgdb.c
> @@ -266,6 +266,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
>  		ptr = &remcomInBuffer[1];
>  		if (kgdb_hex2long(&ptr, &addr))
>  			linux_regs->pc = addr;
> +		/* fallthrough */

Since v5.5-rc1 there is the fallthrough pseudo keyword to document
these cases:
https://elixir.bootlin.com/linux/v5.5-rc1/source/Documentation/process/coding-style.rst#L59


Daniel.


>  	case 'D':
>  	case 'k':
>  		atomic_set(&kgdb_cpu_doing_single_step, -1);
> -- 
> 2.7.4
>
diff mbox series

Patch

diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c
index 6d61f8c..0d5f3c9 100644
--- a/arch/sh/kernel/kgdb.c
+++ b/arch/sh/kernel/kgdb.c
@@ -266,6 +266,7 @@  int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 		ptr = &remcomInBuffer[1];
 		if (kgdb_hex2long(&ptr, &addr))
 			linux_regs->pc = addr;
+		/* fallthrough */
 	case 'D':
 	case 'k':
 		atomic_set(&kgdb_cpu_doing_single_step, -1);