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Subject: Re: [PATCH v10 27/33] mm/writeback: Add folio_wait_stable
To:     "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        akpm@linux-foundation.org
Cc:     linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
        Jeff Layton <jlayton@kernel.org>
References: <20210511214735.1836149-1-willy@infradead.org>
 <20210511214735.1836149-28-willy@infradead.org>
From:   Vlastimil Babka <vbabka@suse.cz>
Message-ID: <f87c35b1-4755-de51-1ce7-7f1deccee44c@suse.cz>
Date:   Tue, 18 May 2021 13:42:04 +0200
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On 5/11/21 11:47 PM, Matthew Wilcox (Oracle) wrote:
> Move wait_for_stable_page() into the folio compatibility file.
> folio_wait_stable() avoids a call to compound_head() and is 14 bytes
> smaller than wait_for_stable_page() was.  The net text size grows by 24
> bytes as a result of this patch.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Acked-by: Jeff Layton <jlayton@kernel.org>

Acked-by: Vlastimil Babka <vbabka@suse.cz>

This seems to remove last user of thp_head(). Remove it as obsolete?