From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756849Ab1E3Nwq (ORCPT ); Mon, 30 May 2011 09:52:46 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:32934 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753104Ab1E3Nwc (ORCPT ); Mon, 30 May 2011 09:52:32 -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=lwcN5s0R0CjJRpgXjugS5qr3o9bDZoYuFP4+nGEBg9MumZtqSP01nBke6RyCRiAlI2 5WSG/sWOgLgf3glOJShvzKO4RHzeqQ73Lo6CbJe1ZZIQwUwgE2z4AzS3LAQJxy4072hZ BsMlfBDQlI3zXNWykTlU3boI16AGUVv/KI1gg= From: Akinobu Mita To: linux-kernel@vger.kernel.org Cc: Akinobu Mita , reiserfs-devel@vger.kernel.org Subject: [PATCH 3/3] reiserfs: use hweight_long Date: Mon, 30 May 2011 22:53:15 +0900 Message-Id: <1306763595-13908-3-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 1.7.4.4 In-Reply-To: <1306763595-13908-1-git-send-email-akinobu.mita@gmail.com> References: <1306763595-13908-1-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 f9e26c1..69d7137 100644 --- a/fs/reiserfs/bitmap.c +++ b/fs/reiserfs/bitmap.c @@ -1219,15 +1219,11 @@ 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 (!test_bit_le(i, cur)) - info->free_count++; + info->free_count += BITS_PER_LONG - hweight_long(*cur); } } -- 1.7.4.4