[PATCH] sh: kernel: disassemble: Mark expected switch fall-throughs

[PATCH] sh: kernel: disassemble: Mark expected switch fall-throughs

[Gustavo A. R. Silva]

Mark switch cases where we are expecting to fall through.

Fix the following warnings (Building: defconfig sh):

arch/sh/kernel/disassemble.c:478:8: warning: this statement may fall
through [-Wimplicit-fallthrough=]
arch/sh/kernel/disassemble.c:487:8: warning: this statement may fall
through [-Wimplicit-fallthrough=]
arch/sh/kernel/disassemble.c:496:8: warning: this statement may fall
through [-Wimplicit-fallthrough=]

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---

If no one cares, I'll apply this to my tree and queue it up for 5.3-rc4.

 arch/sh/kernel/disassemble.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/sh/kernel/disassemble.c b/arch/sh/kernel/disassemble.c
index defebf1a9c8a..91c87e9891da 100644
--- a/arch/sh/kernel/disassemble.c
+++ b/arch/sh/kernel/disassemble.c
@@ -477,6 +477,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
 			case FD_REG_N:
 				if (0)
 					goto d_reg_n;
+				/* else, fall through */
 			case F_REG_N:
 				printk("fr%d", rn);
 				break;
@@ -488,6 +489,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
 					printk("xd%d", rn & ~1);
 					break;
 				}
+				/* else, fall through */
 			d_reg_n:
 			case D_REG_N:
 				printk("dr%d", rn);
@@ -497,6 +499,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
 					printk("xd%d", rm & ~1);
 					break;
 				}
+				/* else, fall through */
 			case D_REG_M:
 				printk("dr%d", rm);
 				break;
-- 
2.22.0

Re: [PATCH] sh: kernel: disassemble: Mark expected switch fall-throughs

[Joe Perches]

On Sat, 2019-08-10 at 00:01 -0500, Gustavo A. R. Silva wrote:
> Mark switch cases where we are expecting to fall through.
> 
> Fix the following warnings (Building: defconfig sh):
[]
> diff --git a/arch/sh/kernel/disassemble.c b/arch/sh/kernel/disassemble.c
[]
> @@ -477,6 +477,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
>  			case FD_REG_N:
>  				if (0)
>  					goto d_reg_n;

Might as well remove this if (0) goto,
remove the added comment

> +				/* else, fall through */
>  			case F_REG_N:
>  				printk("fr%d", rn);
>  				break;
> @@ -488,6 +489,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
>  					printk("xd%d", rn & ~1);
>  					break;
>  				}
> +				/* else, fall through */
>  			d_reg_n:

and remove this only use of d_reg_n

>  			case D_REG_N:
>  				printk("dr%d", rn);
> @@ -497,6 +499,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
>  					printk("xd%d", rm & ~1);
>  					break;
>  				}
> +				/* else, fall through */
>  			case D_REG_M:
>  				printk("dr%d", rm);
>  				break;

Re: [PATCH] sh: kernel: disassemble: Mark expected switch fall-throughs

[Gustavo A. R. Silva]

On 8/10/19 12:08 AM, Joe Perches wrote:
> On Sat, 2019-08-10 at 00:01 -0500, Gustavo A. R. Silva wrote:
>> Mark switch cases where we are expecting to fall through.
>>
>> Fix the following warnings (Building: defconfig sh):
> []
>> diff --git a/arch/sh/kernel/disassemble.c b/arch/sh/kernel/disassemble.c
> []
>> @@ -477,6 +477,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
>>  			case FD_REG_N:
>>  				if (0)
>>  					goto d_reg_n;
> 
> Might as well remove this if (0) goto,
> remove the added comment
> 

You're right. I'll respin and stop working this Friday midnight.

>> +				/* else, fall through */
>>  			case F_REG_N:
>>  				printk("fr%d", rn);
>>  				break;
>> @@ -488,6 +489,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
>>  					printk("xd%d", rn & ~1);
>>  					break;
>>  				}
>> +				/* else, fall through */
>>  			d_reg_n:
> 
> and remove this only use of d_reg_n
> 

Sure.

Thanks
--
Gustavo

>>  			case D_REG_N:
>>  				printk("dr%d", rn);
>> @@ -497,6 +499,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
>>  					printk("xd%d", rm & ~1);
>>  					break;
>>  				}
>> +				/* else, fall through */
>>  			case D_REG_M:
>>  				printk("dr%d", rm);
>>  				break;
>