From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964938Ab2FBNkw (ORCPT ); Sat, 2 Jun 2012 09:40:52 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:49994 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759668Ab2FBNkr (ORCPT ); Sat, 2 Jun 2012 09:40:47 -0400 From: Akinobu Mita To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org Cc: Akinobu Mita , linux-fsdevel@vger.kernel.org Subject: [PATCH v2 02/10] minixfs: use memweight() Date: Sat, 2 Jun 2012 22:40:08 +0900 Message-Id: <1338644416-11417-2-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1338644416-11417-1-git-send-email-akinobu.mita@gmail.com> References: <1338644416-11417-1-git-send-email-akinobu.mita@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use memweight() to count the total number of bits clear in memory area. Signed-off-by: Akinobu Mita Cc: linux-fsdevel@vger.kernel.org --- No changes from v1 fs/minix/bitmap.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-) diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c index 4bc50da..564f1a5 100644 --- a/fs/minix/bitmap.c +++ b/fs/minix/bitmap.c @@ -29,10 +29,8 @@ static __u32 count_free(struct buffer_head *map[], unsigned blocksize, __u32 num unsigned blocks = DIV_ROUND_UP(numbits, blocksize * 8); while (blocks--) { - unsigned words = blocksize / 2; - __u16 *p = (__u16 *)(*map++)->b_data; - while (words--) - sum += 16 - hweight16(*p++); + sum += blocksize * BITS_PER_BYTE - + memweight((*map++)->b_data, blocksize); } return sum; -- 1.7.7.6