linux-kernel - Re: [PATCH v23 8/9] mm: memory_hotplug: disable memmap_on_memory when hugetlb_free

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Date:   Mon, 10 May 2021 12:08:14 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     corbet@....net, mike.kravetz@...cle.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, x86@...nel.org, hpa@...or.com,
        dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        viro@...iv.linux.org.uk, akpm@...ux-foundation.org,
        paulmck@...nel.org, pawan.kumar.gupta@...ux.intel.com,
        rdunlap@...radead.org, oneukum@...e.com, anshuman.khandual@....com,
        jroedel@...e.de, almasrymina@...gle.com, rientjes@...gle.com,
        willy@...radead.org, mhocko@...e.com, song.bao.hua@...ilicon.com,
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        fam.zheng@...edance.com, zhengqi.arch@...edance.com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v23 8/9] mm: memory_hotplug: disable memmap_on_memory
 when hugetlb_free_vmemmap enabled

On Mon, May 10, 2021 at 11:00:26AM +0800, Muchun Song wrote:
> diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
> index 8cc195c4c861..0d7f595ee441 100644
> --- a/drivers/acpi/acpi_memhotplug.c
> +++ b/drivers/acpi/acpi_memhotplug.c
> @@ -15,6 +15,7 @@
>  #include <linux/acpi.h>
>  #include <linux/memory.h>
>  #include <linux/memory_hotplug.h>
> +#include <linux/hugetlb.h>
>  
>  #include "internal.h"

Uhm, I am confused.
Why do we need this here? AFAICS, we do not.

The function is in memory_hotplug.c, and that alrady has that include.
What am I missing?


-- 
Oscar Salvador
SUSE L3