linux-kernel - Re: [RFC PATCH 1/3] mm:hugetlb: Define system call hugetlb size encodings in single file

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Date:   Mon, 17 Jul 2017 17:00:18 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, mhocko@...e.com, ak@...ux.intel.com,
        mtk.manpages@...il.com, Davidlohr Bueso <dbueso@...e.de>,
        khandual@...ux.vnet.ibm.com, aneesh.kumar@...ux.vnet.ibm.com,
        aarcange@...hat.com
Subject: Re: [RFC PATCH 1/3] mm:hugetlb:  Define system call hugetlb size
 encodings in single file

On Mon, Jul 17, 2017 at 03:27:59PM -0700, Mike Kravetz wrote:
> +#define HUGETLB_FLAG_ENCODE_512KB	(19 << MAP_HUGE_SHIFT
> +#define HUGETLB_FLAG_ENCODE_1MB		(20 << MAP_HUGE_SHIFT)
> +#define HUGETLB_FLAG_ENCODE_2MB		(21 << MAP_HUGE_SHIFT)
> +#define HUGETLB_FLAG_ENCODE_8MB		(23 << MAP_HUGE_SHIFT)
> +#define HUGETLB_FLAG_ENCODE_16MB	(24 << MAP_HUGE_SHIFT)
> +#define HUGETLB_FLAG_ENCODE_1GB		(30 << MAP_HUGE_SHIFT)
> +#define HUGETLB_FLAG_ENCODE__16GB	(34 << MAP_HUGE_SHIFT)

The __ seems like a mistake?