linux-kernel - Re: [PATCH v3] Documentation/highmem: Add information about kmap_local

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Message-ID: <87r0paxooq.fsf@meer.lwn.net>
Date:   Fri, 14 Jul 2023 13:45:09 -0600
From:   Jonathan Corbet <corbet@....net>
To:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        "Mike Rapoport (IBM)" <rppt@...nel.org>,
        Ira Weiny <ira.weiny@...el.com>,
        Deming Wang <wangdeming@...pur.com>, linux-doc@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Matthew Wilcox <willy@...radead.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Peter Collingbourne <pcc@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vlastimil Babka <vbabka@...e.cz>, Will Deacon <will@...nel.org>
Subject: Re: [PATCH v3] Documentation/highmem: Add information about
 kmap_local_folio()

"Fabio M. De Francesco" <fmdefrancesco@...il.com> writes:

> The differences between kmap_local_page() and kmap_local_folio() consist
> only in the first taking a pointer to a page and the second taking two
> arguments, a pointer to a folio and the byte offset within the folio which
> identifies the page.
>
> The two API's can be explained at the same time in the "Temporary Virtual
> Mappings" section of the Highmem's documentation.
>
> Add information about kmap_local_folio() in the same subsection that
> explains kmap_local_page().
>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Ira Weiny <ira.weiny@...el.com>
> Cc: Jonathan Corbet <corbet@....net>
> Cc: Matthew Wilcox (Oracle) <willy@...radead.org>
> Cc: Mike Rapoport <rppt@...ux.ibm.com>
> Cc: Peter Collingbourne <pcc@...gle.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Randy Dunlap <rdunlap@...radead.org>
> Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Vlastimil Babka <vbabka@...e.cz>
> Cc: Will Deacon <will@...nel.org>
> Reviewed-by: Ira Weiny <ira.weiny@...el.com>
> Reviewed-by: Mike Rapoport (IBM) <rppt@...nel.org>
> Signed-off-by: Fabio M. De Francesco <fmdefrancesco@...il.com>
> ---
>
> v2->v3:	Replaced "request" with "create". Noticed by Randy (thanks),
> 	fixed by Matthew (again thanks).
> 	https://lore.kernel.org/lkml/970a881a-cdaf-2568-657a-3b93b0273338@infradead.org/
>
> v1-v2:	I had Cc'ed everybody but Andrew :-( Sorry, it's now fixed.
> 	In the meantime, I collected the review tags by Ira and Mike
> 	(thanks to both of you). All entries are listed using a simple
> 	ascending lexycographycal order based on first names.
>
>  Documentation/mm/highmem.rst | 27 +++++++++++++++------------
>  1 file changed, 15 insertions(+), 12 deletions(-)

Applied, thanks.

jon