linux-kernel - Re: [PATCH 08/17] mm: page_alloc: Use word-based accesses for get/set pageblock bitmaps

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Message-ID: <53641D8C.6040601@oracle.com>
Date:	Fri, 02 May 2014 18:34:52 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Mel Gorman <mgorman@...e.de>, Linux-MM <linux-mm@...ck.org>,
	Linux-FSDevel <linux-fsdevel@...r.kernel.org>
CC:	Johannes Weiner <hannes@...xchg.org>,
	Vlastimil Babka <vbabka@...e.cz>, Jan Kara <jack@...e.cz>,
	Michal Hocko <mhocko@...e.cz>, Hugh Dickins <hughd@...gle.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/17] mm: page_alloc: Use word-based accesses for get/set
 pageblock bitmaps

Hi Mel,

Vlastimil Babka suggested I should try this patch to work around a different
issue I'm seeing, and noticed that it doesn't build because:

On 05/01/2014 04:44 AM, Mel Gorman wrote:
> +void set_pageblock_flags_mask(struct page *page,
> +				unsigned long flags,
> +				unsigned long end_bitidx,
> +				unsigned long nr_flag_bits,
> +				unsigned long mask);

set_pageblock_flags_mask() is declared.


> +static inline void set_pageblock_flags_group(struct page *page,
> +					unsigned long flags,
> +					int start_bitidx, int end_bitidx)
> +{
> +	unsigned long nr_flag_bits = end_bitidx - start_bitidx + 1;
> +	unsigned long mask = (1 << nr_flag_bits) - 1;
> +
> +	set_pageblock_flags_mask(page, flags, end_bitidx, nr_flag_bits, mask);
> +}

And used here, but never actually defined.


Thanks,
Sasha
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