mlx4: use bitmap_find_next_zero_area

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Roland Dreier <rolandd@cisco.com>
Cc: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/net/mlx4/alloc.c

@@ -72,35 +72,6 @@ void mlx4_bitmap_free(struct mlx4_bitmap *bitmap, u32 obj)
 	mlx4_bitmap_free_range(bitmap, obj, 1);
 }
 
-static unsigned long find_aligned_range(unsigned long *bitmap,
-					u32 start, u32 nbits,
-					int len, int align)
-{
-	unsigned long end, i;
-
-again:
-	start = ALIGN(start, align);
-
-	while ((start < nbits) && test_bit(start, bitmap))
-		start += align;
-
-	if (start >= nbits)
-		return -1;
-
-	end = start+len;
-	if (end > nbits)
-		return -1;
-
-	for (i = start + 1; i < end; i++) {
-		if (test_bit(i, bitmap)) {
-			start = i + 1;
-			goto again;
-		}
-	}
-
-	return start;
-}
-
 u32 mlx4_bitmap_alloc_range(struct mlx4_bitmap *bitmap, int cnt, int align)
 {
 	u32 obj, i;
@@ -110,13 +81,13 @@ u32 mlx4_bitmap_alloc_range(struct mlx4_bitmap *bitmap, int cnt, int align)
 
 	spin_lock(&bitmap->lock);
 
-	obj = find_aligned_range(bitmap->table, bitmap->last,
-				 bitmap->max, cnt, align);
+	obj = bitmap_find_next_zero_area(bitmap->table, bitmap->max,
+				bitmap->last, cnt, align - 1);
 	if (obj >= bitmap->max) {
 		bitmap->top = (bitmap->top + bitmap->max + bitmap->reserved_top)
 				& bitmap->mask;
-		obj = find_aligned_range(bitmap->table, 0, bitmap->max,
-					 cnt, align);
+		obj = bitmap_find_next_zero_area(bitmap->table, bitmap->max,
+						0, cnt, align - 1);
 	}
 
 	if (obj < bitmap->max) {