linux-kernel - Re: [PATCH] mm: Move mem_init_print_info() into mm

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Date:   Tue, 16 Mar 2021 14:16:35 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Richard Henderson <rth@...ddle.net>,
        Guo Ren <guoren@...nel.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jonas Bonn <jonas@...thpole.se>,
        Palmer Dabbelt <palmer@...belt.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        "David S. Miller" <davem@...emloft.net>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, linux-alpha@...r.kernel.org,
        linux-snps-arc@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org,
        linux-hexagon@...r.kernel.org, linux-ia64@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
        openrisc@...ts.librecores.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
        sparclinux@...r.kernel.org, linux-um@...ts.infradead.org,
        linux-xtensa@...ux-xtensa.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: Move mem_init_print_info() into mm_init()

On 3/16/21 7:26 AM, Kefeng Wang wrote:
> diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
> index 5430c81eefc9..aa8387aab9c1 100644
> --- a/arch/x86/mm/init_64.c
> +++ b/arch/x86/mm/init_64.c
> @@ -1350,8 +1350,6 @@ void __init mem_init(void)
>  		kclist_add(&kcore_vsyscall, (void *)VSYSCALL_ADDR, PAGE_SIZE, KCORE_USER);
>  
>  	preallocate_vmalloc_pages();
> -
> -	mem_init_print_info(NULL);
>  }

Ignoring any issues with the printk...

Looks harmless enough on x86.  The 32-bit code has some cruft in
mem_init() after mem_init_print_info(), so this patch will change the
location of the mem_init_print_info(), but I think it's actually for the
better, since it will be pushed later in boot.  As long as the x86
pieces stay the same:

Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>