linux-kernel - Re: [PATCH v2 1/6] mm/migrate: introduce migrate_pfn_to

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Message-ID: <Zc_YiSDsmdv-2Rcm@casper.infradead.org>
Date: Fri, 16 Feb 2024 21:50:01 +0000
From: Matthew Wilcox <willy@...radead.org>
To: Sidhartha Kumar <sidhartha.kumar@...cle.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org, apopple@...dia.com
Subject: Re: [PATCH v2 1/6] mm/migrate: introduce migrate_pfn_to_folio()

On Fri, Feb 16, 2024 at 01:13:15PM -0800, Sidhartha Kumar wrote:
> +static inline struct folio *migrate_pfn_to_folio(unsigned long mpfn)
> +{
> +	return page_folio(migrate_pfn_to_page(mpfn));

umm, no.

	struct page *page = migrate_pfn_to_page(mpfn);
	if (page)
		return page_folio(page);
	return NULL;