linux-kernel - Re: [PATCH v12 21/22] selftests/vm: sub-page allocator

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Date:   Fri, 16 Mar 2018 15:33:56 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Ram Pai <linuxram@...ibm.com>, shuahkh@....samsung.com,
        linux-kselftest@...r.kernel.org
Cc:     mpe@...erman.id.au, linuxppc-dev@...ts.ozlabs.org,
        linux-mm@...ck.org, x86@...nel.org, linux-arch@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, akpm@...ux-foundation.org,
        benh@...nel.crashing.org, paulus@...ba.org,
        khandual@...ux.vnet.ibm.com, aneesh.kumar@...ux.vnet.ibm.com,
        bsingharora@...il.com, hbabu@...ibm.com, mhocko@...nel.org,
        bauerman@...ux.vnet.ibm.com, ebiederm@...ssion.com, arnd@...db.de
Subject: Re: [PATCH v12 21/22] selftests/vm: sub-page allocator

On 02/21/2018 05:55 PM, Ram Pai wrote:
...
> @@ -888,6 +917,7 @@ void setup_hugetlbfs(void)
>  void *(*pkey_malloc[])(long size, int prot, u16 pkey) = {
>  
>  	malloc_pkey_with_mprotect,
> +	malloc_pkey_with_mprotect_subpage,
>  	malloc_pkey_anon_huge,
>  	malloc_pkey_hugetlb
>  /* can not do direct with the pkey_mprotect() API:


I think I'd rather have an #ifdef on the array entries than have the
malloc entry do nothing on x86.  Maybe have a ppc-specific section at
the end?