[PATCH] intel_th: Mark expected switch fall-throughs

[PATCH] intel_th: Mark expected switch fall-throughs

[Gustavo A. R. Silva]

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

drivers/hwtracing/intel_th/sth.c: In function ‘sth_stm_packet’:
drivers/hwtracing/intel_th/sth.c:86:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
   reg += 4;
   ~~~~^~~~
drivers/hwtracing/intel_th/sth.c:87:2: note: here
  case STP_PACKET_XSYNC:
  ^~~~
drivers/hwtracing/intel_th/sth.c:88:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
   reg += 8;
   ~~~~^~~~
drivers/hwtracing/intel_th/sth.c:89:2: note: here
  case STP_PACKET_TRIG:
  ^~~~

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

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

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 drivers/hwtracing/intel_th/sth.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/hwtracing/intel_th/sth.c b/drivers/hwtracing/intel_th/sth.c
index 4b7ae47789d2..3a1f4e650378 100644
--- a/drivers/hwtracing/intel_th/sth.c
+++ b/drivers/hwtracing/intel_th/sth.c
@@ -84,8 +84,12 @@ static ssize_t notrace sth_stm_packet(struct stm_data *stm_data,
 	/* Global packets (GERR, XSYNC, TRIG) are sent with register writes */
 	case STP_PACKET_GERR:
 		reg += 4;
+		/* fall through */
+
 	case STP_PACKET_XSYNC:
 		reg += 8;
+		/* fall through */
+
 	case STP_PACKET_TRIG:
 		if (flags & STP_PACKET_TIMESTAMPED)
 			reg += 4;
-- 
2.20.1

Re: [PATCH] intel_th: Mark expected switch fall-throughs

[Gustavo A. R. Silva]

Hi all,

Friendly ping:

Who can take this?

Thanks
--
Gustavo

On 2/12/19 3:43 PM, 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 warnings:
> 
> drivers/hwtracing/intel_th/sth.c: In function ‘sth_stm_packet’:
> drivers/hwtracing/intel_th/sth.c:86:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    reg += 4;
>    ~~~~^~~~
> drivers/hwtracing/intel_th/sth.c:87:2: note: here
>   case STP_PACKET_XSYNC:
>   ^~~~
> drivers/hwtracing/intel_th/sth.c:88:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    reg += 8;
>    ~~~~^~~~
> drivers/hwtracing/intel_th/sth.c:89:2: note: here
>   case STP_PACKET_TRIG:
>   ^~~~
> 
> Warning level 3 was used: -Wimplicit-fallthrough=3
> 
> This patch is part of the ongoing efforts to enable
> -Wimplicit-fallthrough.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
>  drivers/hwtracing/intel_th/sth.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/hwtracing/intel_th/sth.c b/drivers/hwtracing/intel_th/sth.c
> index 4b7ae47789d2..3a1f4e650378 100644
> --- a/drivers/hwtracing/intel_th/sth.c
> +++ b/drivers/hwtracing/intel_th/sth.c
> @@ -84,8 +84,12 @@ static ssize_t notrace sth_stm_packet(struct stm_data *stm_data,
>  	/* Global packets (GERR, XSYNC, TRIG) are sent with register writes */
>  	case STP_PACKET_GERR:
>  		reg += 4;
> +		/* fall through */
> +
>  	case STP_PACKET_XSYNC:
>  		reg += 8;
> +		/* fall through */
> +
>  	case STP_PACKET_TRIG:
>  		if (flags & STP_PACKET_TIMESTAMPED)
>  			reg += 4;
> 

Re: [PATCH] intel_th: Mark expected switch fall-throughs

[Alexander Shishkin]

"Gustavo A. R. Silva" <gustavo@embeddedor.com> writes:

> Hi all,
>
> Friendly ping:
>
> Who can take this?

I'll take it. Thanks!