linux-kernel - Re: [PATCH 3/3] mm, arch: add generic implementation of pfn

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Message-Id: <03605ec4-3e31-475e-8acf-2c342436aa24@app.fastmail.com>
Date:   Thu, 26 Jan 2023 08:22:15 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Mike Rapoport" <rppt@...nel.org>,
        "Andrew Morton" <akpm@...ux-foundation.org>
Cc:     "Brian Cain" <bcain@...cinc.com>,
        "David S . Miller" <davem@...emloft.net>,
        "Dinh Nguyen" <dinguyen@...nel.org>,
        "Geert Uytterhoeven" <geert@...ux-m68k.org>,
        "Greg Ungerer" <gerg@...ux-m68k.org>, guoren <guoren@...nel.org>,
        "Helge Deller" <deller@....de>,
        "Huacai Chen" <chenhuacai@...nel.org>,
        "Matt Turner" <mattst88@...il.com>,
        "Max Filippov" <jcmvbkbc@...il.com>,
        "Michael Ellerman" <mpe@...erman.id.au>,
        "Michal Simek" <monstr@...str.eu>,
        "Palmer Dabbelt" <palmer@...belt.com>,
        "Rich Felker" <dalias@...c.org>,
        "Richard Weinberger" <richard@....at>,
        "Stafford Horne" <shorne@...il.com>,
        "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
        "Vineet Gupta" <vgupta@...nel.org>,
        "WANG Xuerui" <kernel@...0n.name>,
        "Yoshinori Sato" <ysato@...rs.sourceforge.jp>,
        linux-alpha@...r.kernel.org,
        Linux-Arch <linux-arch@...r.kernel.org>,
        linux--csky@...r.kernel.org, linux-hexagon@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
        linux-parisc@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-sh@...r.kernel.org, linux-snps-arc@...ts.infradead.org,
        linux-um@...ts.infradead.org, linux-xtensa@...ux-xtensa.org,
        linuxppc-dev@...ts.ozlabs.org, loongarch@...ts.linux.dev,
        openrisc@...ts.librecores.org, sparclinux@...r.kernel.org,
        x86@...nel.org
Subject: Re: [PATCH 3/3] mm, arch: add generic implementation of pfn_valid() for
 FLATMEM

On Wed, Jan 25, 2023, at 20:07, Mike Rapoport wrote:
> From: "Mike Rapoport (IBM)" <rppt@...nel.org>
>
> Every architecture that supports FLATMEM memory model defines its own
> version of pfn_valid() that essentially compares a pfn to max_mapnr.
>
> Use mips/powerpc version implemented as static inline as a generic
> implementation of pfn_valid() and drop its per-architecture definitions
>
> Signed-off-by: Mike Rapoport (IBM) <rppt@...nel.org>

Acked-by: Arnd Bergmann <arnd@...db.de>

I assume this can best go through the mm tree, let me know if I should
pick it up in the asm-generic tree instead.

     Arnd