linux-kernel - Re: [PATCH v2 4/4] mm, arch: add generic implementation of pfn

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Message-ID: <87o7qgsjaq.fsf@mpe.ellerman.id.au>
Date:   Mon, 30 Jan 2023 16:06:21 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, 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>,
        Guo Ren <guoren@...nel.org>, Helge Deller <deller@....de>,
        Huacai Chen <chenhuacai@...nel.org>,
        Matt Turner <mattst88@...il.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        Michal Simek <monstr@...str.eu>,
        Palmer Dabbelt <palmer@...belt.com>,
        Rich Felker <dalias@...c.org>,
        Richard Weinberger <richard@....at>,
        Russell King <linux@...linux.org.uk>,
        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@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.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-mm@...ck.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, "Mike Rapoport (IBM)" <rppt@...nel.org>,
        Huacai Chen <chenhuacai@...ngson.cn>
Subject: Re: [PATCH v2 4/4] mm, arch: add generic implementation of
 pfn_valid() for FLATMEM

Mike Rapoport <rppt@...nel.org> writes:
> 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>
> Acked-by: Guo Ren <guoren@...nel.org>		# csky
> Acked-by: Huacai Chen <chenhuacai@...ngson.cn>	# LoongArch
> Acked-by: Stafford Horne <shorne@...il.com>	# OpenRISC
> ---
>  arch/alpha/include/asm/page.h      |  4 ----
>  arch/arc/include/asm/page.h        |  1 -
>  arch/csky/include/asm/page.h       |  1 -
>  arch/hexagon/include/asm/page.h    |  1 -
>  arch/ia64/include/asm/page.h       |  4 ----
>  arch/loongarch/include/asm/page.h  | 13 -------------
>  arch/m68k/include/asm/page_no.h    |  2 --
>  arch/microblaze/include/asm/page.h |  1 -
>  arch/mips/include/asm/page.h       | 13 -------------
>  arch/nios2/include/asm/page.h      |  9 ---------
>  arch/openrisc/include/asm/page.h   |  2 --
>  arch/parisc/include/asm/page.h     |  4 ----
>  arch/powerpc/include/asm/page.h    |  9 ---------

Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)

cheers