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    SubjectRe: [PATCH 08/29] Staging: yaffs2: yaffs_ecc: Add files
    From
    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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