linux-kernel - Re: [PATCH 03/10] Add yaffs2 file system: checkpoint streaming

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Date:	Fri, 11 Feb 2011 11:44:43 +1300
From:	Ryan Mallon <ryan@...ewatersys.com>
To:	Jesper Juhl <jj@...osbits.net>
CC:	Charles Manning <cdhmanning@...il.com>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 03/10] Add yaffs2 file system: checkpoint streaming

On 02/11/2011 11:27 AM, Jesper Juhl wrote:
> On Wed, 9 Feb 2011, Charles Manning wrote:
> 
>> Signed-off-by: Charles Manning <cdhmanning@...il.com>
>> ---
>>  fs/yaffs2/yaffs_checkptrw.c |  408 +++++++++++++++++++++++++++++++++++++++++++
>>  fs/yaffs2/yaffs_checkptrw.h |   33 ++++
>>  2 files changed, 441 insertions(+), 0 deletions(-)
>>  create mode 100644 fs/yaffs2/yaffs_checkptrw.c
>>  create mode 100644 fs/yaffs2/yaffs_checkptrw.h
>>
>> diff --git a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c
>> new file mode 100644
>> index 0000000..997a618
>> --- /dev/null
>> +++ b/fs/yaffs2/yaffs_checkptrw.c
>> @@ -0,0 +1,408 @@
>> +/*
>> + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
>> + *
>> + * Copyright (C) 2002-2011 Aleph One Ltd.
>> + *   for Toby Churchill Ltd and Brightstar Engineering
>> + *
>> + * Created by Charles Manning <charles@...ph1.co.uk>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License version 2 as
>> + * published by the Free Software Foundation.
>> + */
>> +
>> +#include "yaffs_checkptrw.h"
>> +#include "yaffs_getblockinfo.h"
>> +
>> +static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev)
>> +{
>> +	int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
>> +
>> +	yaffs_trace(YAFFS_TRACE_CHECKPOINT,
>> +		"checkpt blocks_avail = %d", blocks_avail);
>> +
>> +	return (blocks_avail <= 0) ? 0 : 1;
>> +}
>> +
>> +static int yaffs_checkpt_erase(struct yaffs_dev *dev)
>> +{
>> +	int i;
>> +
>> +	if (!dev->param.erase_fn)
>> +		return 0;
>> +	yaffs_trace(YAFFS_TRACE_CHECKPOINT,
>> +		"checking blocks %d to %d",
>> +		dev->internal_start_block, dev->internal_end_block);
>> +
>> +	for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
> 
> Why does 'i' need 'function scope'? can't it just have 'for scope'?
> 
>      for (int i = dev->internal_start_block; i <= dev->internal_end_block; i++) {

Because we don't do that in kernel code.

ryan@...wi:linux-2.6$ grep "for (int" * -R | wc -l
16

Those sixteen should be fixed :-). Half of them are in drivers/staging.

~Ryan

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