linux-kernel - Re: [PATCH 03/12] mm: abstract out wake_page_match() from wake_page

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Message-ID: <20200601141632.GI19604@bombadil.infradead.org>
Date:   Mon, 1 Jun 2020 07:16:32 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     io-uring@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        akpm@...ux-foundation.org, David Howells <dhowells@...hat.com>
Subject: Re: [PATCH 03/12] mm: abstract out wake_page_match() from
 wake_page_function()

On Tue, May 26, 2020 at 01:51:14PM -0600, Jens Axboe wrote:
> +++ b/include/linux/pagemap.h
> @@ -456,6 +456,43 @@ static inline pgoff_t linear_page_index(struct vm_area_struct *vma,
>  	return pgoff;
>  }
>  
> +/* This has the same layout as wait_bit_key - see fs/cachefiles/rdwr.c */
> +struct wait_page_key {
> +	struct page *page;
> +	int bit_nr;
> +	int page_match;
> +};

I know you only moved the struct, and the comment along with it, but now
that this struct is in pagemap.h, I think cachefiles should be updated
to use wait_page_key instead of wait_bit_key.  Dave?