drivers/staging/rts_pstor/general.c

   1 /* Driver for Realtek PCI-Express card reader
   2  *
   3  * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2, or (at your option) any
   8  * later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author:
  19  *   wwang (wei_wang@realsil.com.cn)
  20  *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
  21  */
  22
  23 #include "general.h"
  24
  25 int bit1cnt_long(u32 data)
  26 {
  27         int i, cnt = 0;
  28         for (i = 0; i < 32; i++) {
  29                 if (data & 0x01)
  30                         cnt++;
  31                 data >>= 1;
  32         }
  33         return cnt;
  34 }
  35