On Mon, Nov 1, 2010 at 8:40 PM, Tracey Dent <tdent48227@xxxxxxxxx> wrote:
> Adding files to yaffs2 directory.
>
> Signed-off-by: Tracey Dent <tdent48227@xxxxxxxxx>
> ---
> 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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