bitmap: replace _reg_op(REG_OP_ISFREE) with find_next_bit()

_reg_op(REG_OP_ISFREE) can be trivially replaced with find_next_bit().
Doing that opens room for potential small_const_nbits() optimization.

CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Yury Norov <yury.norov@gmail.com>

diff --git a/lib/bitmap.c b/lib/bitmap.c
index babed4dcb4679627778e6a0b1c09f9167b842788..e4d761a69fe83802f04165d2aca9820651f2271e 100644 (file)
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -840,7 +840,7 @@ int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order)
 {
        unsigned int len = BIT(order);
 
-       if (!__reg_op(bitmap, pos, order, REG_OP_ISFREE))
+       if (find_next_bit(bitmap, pos + len, pos) < pos + len)
                return -EBUSY;
        bitmap_set(bitmap, pos, len);
        return 0;