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	<1288636877-7964-9-git-send-email-tdent48227@gmail.com>
Date: Mon, 1 Nov 2010 21:04:21 +0200
Message-ID: <AANLkTimHpKYMt=UD-rnPk+yZyYUUw2SHs5g1uNr7H-1d@mail.gmail.com>
Subject: Re: [PATCH 08/29] Staging: yaffs2: yaffs_ecc: Add files
From: Pekka Enberg <penberg@kernel.org>
To: Tracey Dent <tdent48227@gmail.com>
Cc: greg@kroah.com, manningc2@actrix.gen.nz, linux-kernel@vger.kernel.org,
        linux-fsdevel@vger.kernel.org
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On Mon, Nov 1, 2010 at 8:40 PM, Tracey Dent <tdent48227@gmail.com> wrote:
> Adding files to yaffs2 directory.
>
> Signed-off-by: Tracey Dent <tdent48227@gmail.com>
> ---
> ?drivers/staging/yaffs2/yaffs_ecc.c | ?323 ++++++++++++++++++++++++++++++++++++
> ?drivers/staging/yaffs2/yaffs_ecc.h | ? 44 +++++
> ?2 files changed, 367 insertions(+), 0 deletions(-)
> ?create mode 100644 drivers/staging/yaffs2/yaffs_ecc.c
> ?create mode 100644 drivers/staging/yaffs2/yaffs_ecc.h
>
> +
> +/* Count the bits in an unsigned char or a U32 */
> +
> +static int yaffs_count_bits(unsigned char x)
> +{
> + ? ? ? int r = 0;
> + ? ? ? while (x) {
> + ? ? ? ? ? ? ? if (x & 1)
> + ? ? ? ? ? ? ? ? ? ? ? r++;
> + ? ? ? ? ? ? ? x >>= 1;
> + ? ? ? }
> + ? ? ? return r;
> +}
> +
> +static int yaffs_count_bits32(unsigned x)
> +{
> + ? ? ? int r = 0;
> + ? ? ? while (x) {
> + ? ? ? ? ? ? ? if (x & 1)
> + ? ? ? ? ? ? ? ? ? ? ? r++;
> + ? ? ? ? ? ? ? x >>= 1;
> + ? ? ? }
> + ? ? ? return r;
> +}

Looks like bitmap_weight() to me.
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