linux-kernel - Re: [PATCH 20/20 v3] sparc/mm/fault_64.c: Port OOM changes to do_sparc64

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Date:	Mon, 26 Mar 2012 09:31:24 -0700
From:	Joe Perches <joe@...ches.com>
To:	Kautuk Consul <consul.kautuk@...il.com>
Cc:	davem@...emloft.net, Paul Gortmaker <paul.gortmaker@...driver.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 20/20 v3] sparc/mm/fault_64.c: Port OOM changes to
 do_sparc64_fault

On Mon, 2012-03-26 at 11:33 -0400, Kautuk Consul wrote:
> diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
> index 504c062..8322962 100644
> --- a/arch/sparc/mm/fault_64.c
> +++ b/arch/sparc/mm/fault_64.c
> @@ -279,6 +279,7 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
>  	unsigned int insn = 0;
>  	int si_code, fault_code, fault;
>  	unsigned long address, mm_rss;
> +	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
>  
>  	fault_code = get_thread_fault_code();
>  
[]
> @@ -423,7 +426,13 @@ good_area:
>  			goto bad_area;
>  	}
>  
> -	fault = handle_mm_fault(mm, vma, address, (fault_code & FAULT_CODE_WRITE) ? FAULT_FLAG_WRITE : 0);
> +	fault = handle_mm_fault(mm, vma, address,
> +							flags | ((fault_code & FAULT_CODE_WRITE) ?
> +									 FAULT_FLAG_WRITE : 0);

A bit redundant and very poor style argument alignment
Make sure your tab indentation is set to 8.

	fault = handle_mm_fault(mm, vma, address,
				flags | (fault_code & FAULT_CODE_WRITE));

though perhaps fault_code could be unsigned and
perhaps you could use the same style initializer
for fault_code as patch 19/20.


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