From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758061Ab1FAOjV (ORCPT ); Wed, 1 Jun 2011 10:39:21 -0400 Received: from mail-px0-f179.google.com ([209.85.212.179]:48725 "EHLO mail-px0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757899Ab1FAOjJ (ORCPT ); Wed, 1 Jun 2011 10:39:09 -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=dUkEzpHXeVTVxFcqe15sA4y607sF8EGs7C2d20NLOj0W8/Y54AD/fcw2Aea+ZL+24/ 1liXuMISXrszul3HwzrD5AMJt4CMSlnbm6imq3cvde1unM+ZNvjjZUe7/sTUe0Eb/AwE L4BD+ql+LbVU1e2+VM+ri92Gg8Y+XCwb/d6/Y= From: Akinobu Mita To: linux-kernel@vger.kernel.org Cc: Akinobu Mita , reiserfs-devel@vger.kernel.org Subject: [PATCH v2 2/2] reiserfs: use hweight_long() Date: Wed, 1 Jun 2011 23:39:58 +0900 Message-Id: <1306939198-11356-2-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 1.7.4.4 In-Reply-To: <1306939198-11356-1-git-send-email-akinobu.mita@gmail.com> References: <1306939198-11356-1-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 --- v2: rewritten to keep reiserfs_*_le_bit() macros 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