From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Tue, 26 Jul 2011 00:13:38 +0000 (-0700)
Subject: reiserfs: use hweight_long()
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=9d6bf5aa177ee7ffdcee2a590ef8a1bf9e8ade87;p=~shefty%2Frdma-dev.git

reiserfs: use hweight_long()

Use hweight_long() to count free bits in the bitmap.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
index 567385aa781..d1aca1df4f9 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);
 	}
 }