From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752245Ab1FZF5N (ORCPT ); Sun, 26 Jun 2011 01:57:13 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:53142 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751390Ab1FZF4t (ORCPT ); Sun, 26 Jun 2011 01:56:49 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=eWesRloaenK6sZNiMf9LenCke89ESzzgAJhhi5Uiw7iWxn/FNx/nO6qy4Dbwbhwc/6 moPfynyvXSGHEVE7ga7xP26LvkZN41fGJeC2oEM1mS6qMiKRTT2RKljM1GzsMLbT8PPx lkjtFFp1fLPiaaw/OIjBGC1+arvdpY12fT4C0= From: Akinobu Mita To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org Cc: Akinobu Mita , reiserfs-devel@vger.kernel.org Subject: [PATCH resend 5/6] reiserfs: use hweight_long() Date: Sun, 26 Jun 2011 14:57:55 +0900 Message-Id: <1309067876-3537-6-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 1.7.4.4 In-Reply-To: <1309067876-3537-1-git-send-email-akinobu.mita@gmail.com> References: <1309067876-3537-1-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 hweight_long() to count free bits in the bitmap. Signed-off-by: Akinobu Mita Cc: reiserfs-devel@vger.kernel.org --- fs/reiserfs/bitmap.c | 6 +----- 1 files changed, 1 insertions(+), 5 deletions(-) diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c index 567385a..d1aca1d 100644 --- a/fs/reiserfs/bitmap.c +++ b/fs/reiserfs/bitmap.c @@ -1222,15 +1222,11 @@ void reiserfs_cache_bitmap_metadata(struct super_block *sb, info->free_count = 0; while (--cur >= (unsigned long *)bh->b_data) { - int i; - /* 0 and ~0 are special, we can optimize for them */ if (*cur == 0) info->free_count += BITS_PER_LONG; else if (*cur != ~0L) /* A mix, investigate */ - for (i = BITS_PER_LONG - 1; i >= 0; i--) - if (!reiserfs_test_le_bit(i, cur)) - info->free_count++; + info->free_count += BITS_PER_LONG - hweight_long(*cur); } } -- 1.7.4.4