ocfs2: use memweight()

Use memweight to count the total number of bits set in memory area. Signed-off-by: Akinobu Mita <[email protected]> Cc: Mark Fasheh <[email protected]> Cc: Joel Becker <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
adn770 · Jul 31, 2012 · a75613e · a75613e
1 parent 9a60139
commit a75613e
Showing 1 changed file with 2 additions and 6 deletions.
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
@@ -784,14 +784,10 @@ int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb,
 
 static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
 {
-	int i;
-	u8 *buffer;
-	u32 count = 0;
+	u32 count;
 	struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
 
-	buffer = la->la_bitmap;
-	for (i = 0; i < le16_to_cpu(la->la_size); i++)
-		count += hweight8(buffer[i]);
+	count = memweight(la->la_bitmap, le16_to_cpu(la->la_size));
 
 	trace_ocfs2_local_alloc_count_bits(count);
 	return count;