Re: [PATCH] Don't pass offset == 0 && endbyte == 0 to do_sync_file_range()

[OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>]

Andrew Morton <akpm@osdl.org> writes:

>>  +		/*
>>  +		 * wbc->start == 0 && wbc->end == 0 is a special range,
>>  +		 * so this avoids using it.
>>  +		 */
>>  +		if (endbyte > 1)
>>  +			endbyte--;		/* inclusive */
>>  +	}
>
> Yes, the problem is that the interface is busted - start=0,end=0 is
> ambiguous and ->writepages() will get it wrong.
>
> So I think it's better to fix the interface...

I agree. And I think WB_SYNC_NONE with rage would be useful.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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