linux-kernel - Re: [PATCH 09/15] nds32: switch to generic version of pte allocation

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Date:   Tue, 7 May 2019 14:49:08 +0800
From:   Greentime Hu <green.hu@...il.com>
To:     Mike Rapoport <rppt@...ux.ibm.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Guan Xuetao <gxt@....edu.cn>, Guo Ren <guoren@...nel.org>,
        Helge Deller <deller@....de>, Ley Foon Tan <lftan@...era.com>,
        Matthew Wilcox <willy@...radead.org>,
        Matt Turner <mattst88@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Hocko <mhocko@...e.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Burton <paul.burton@...s.com>,
        Richard Kuo <rkuo@...eaurora.org>,
        Richard Weinberger <richard@....at>,
        Russell King <linux@...linux.org.uk>,
        Sam Creasey <sammy@...my.net>, x86@...nel.org,
        linux-alpha@...r.kernel.org,
        linux-arch <linux-arch@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-hexagon@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
        linux-parisc@...r.kernel.org,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-riscv@...ts.infradead.org, linux-um@...ts.infradead.org,
        nios2-dev@...ts.rocketboards.org
Subject: Re: [PATCH 09/15] nds32: switch to generic version of pte allocation

Hi Mike,

Mike Rapoport <rppt@...ux.ibm.com> 於 2019年5月2日 週四 下午11:30寫道：
>
> The nds32 implementation of pte_alloc_one_kernel() differs from the generic
> in the use of __GFP_RETRY_MAYFAIL flag, which is removed after the
> conversion.
>
> The nds32 version of pte_alloc_one() missed the call to pgtable_page_ctor()
> and also used __GFP_RETRY_MAYFAIL. Switching it to use generic
> __pte_alloc_one() for the PTE page allocation ensures that page table
> constructor is run and the user page tables are allocated with
> __GFP_ACCOUNT.
>
> The conversion to the generic version of pte_free_kernel() removes the NULL
> check for pte.
>
> The pte_free() version on nds32 is identical to the generic one and can be
> simply dropped.
>
> Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
> ---
>  arch/nds32/include/asm/pgalloc.h | 31 ++++---------------------------
>  1 file changed, 4 insertions(+), 27 deletions(-)

Thanks for your patch.
I'm assuming this is going in along with the rest of the patches, so I'm not
going to add it to my tree.

Acked-by: Greentime Hu <greentime@...estech.com>