linux-kernel - Re: [PATCH] [8/23] KGDB: Remove set but unused newPC

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Date:	Fri, 30 Jul 2010 06:59:30 -0500
From:	Jason Wessel <jason.wessel@...driver.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [8/23] KGDB: Remove set but unused newPC



On 06/10/2010 06:10 AM, Andi Kleen wrote:
> I'm not fully sure this is the correct fix, maybe this
> was a bug and newPC should really have a side effect.
> Jason?
>
>   
Andi,

This looks fine to me.  The newPC got there from the merge of the 32/64
kgdb specific implementation.   Definitely don't need it anymore.

I'll queue it for 2.6.36.

Thanks,
Jason.

> Found by gcc 4.6's new warnings
>
> Cc: jason.wessel@...driver.com
>
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
>
> ---
>  arch/x86/kernel/kgdb.c |    3 ---
>  1 file changed, 3 deletions(-)
>
> Index: linux-2.6.35-rc2-gcc/arch/x86/kernel/kgdb.c
> ===================================================================
> --- linux-2.6.35-rc2-gcc.orig/arch/x86/kernel/kgdb.c
> +++ linux-2.6.35-rc2-gcc/arch/x86/kernel/kgdb.c
> @@ -458,7 +458,6 @@ int kgdb_arch_handle_exception(int e_vec
>  {
>  	unsigned long addr;
>  	char *ptr;
> -	int newPC;
>  
>  	switch (remcomInBuffer[0]) {
>  	case 'c':
> @@ -469,8 +468,6 @@ int kgdb_arch_handle_exception(int e_vec
>  			linux_regs->ip = addr;
>  	case 'D':
>  	case 'k':
> -		newPC = linux_regs->ip;
> -
>  		/* clear the trace bit */
>  		linux_regs->flags &= ~X86_EFLAGS_TF;
>  		atomic_set(&kgdb_cpu_doing_single_step, -1);
>   

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