linux-kernel - Re: [PATCH v6 26/27] mm/filemap: Convert wake_up_page_bit to wake_up_folio

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Date:   Tue, 6 Apr 2021 15:23:16 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-cachefs@...hat.com,
        linux-afs@...ts.infradead.org
Subject: Re: [PATCH v6 26/27] mm/filemap: Convert wake_up_page_bit to
 wake_up_folio_bit

On Wed, Mar 31, 2021 at 07:47:27PM +0100, Matthew Wilcox (Oracle) wrote:
>  void unlock_page_private_2(struct page *page)
>  {
> -	page = compound_head(page);
> -	VM_BUG_ON_PAGE(!PagePrivate2(page), page);
> -	clear_bit_unlock(PG_private_2, &page->flags);
> -	wake_up_page_bit(page, PG_private_2);
> +	struct folio *folio = page_folio(page);
> +	VM_BUG_ON_FOLIO(!FolioPrivate2(folio), folio);

A whitespace between the declaration and the code would be nice.

Otherwise looks good;

Reviewed-by: Christoph Hellwig <hch@....de>