diff --git a/arch/m68k/include/asm/bitops_mm.h b/arch/m68k/include/asm/bitops_mm.h
index 3d16871..a403b5e 100644
--- a/arch/m68k/include/asm/bitops_mm.h
+++ b/arch/m68k/include/asm/bitops_mm.h
@@ -330,23 +330,19 @@
 static inline int minix_find_first_zero_bit(const void *vaddr, unsigned size)
 {
 	const unsigned short *p = vaddr, *addr = vaddr;
-	int res;
 	unsigned short num;
 
 	if (!size)
 		return 0;
 
 	size = (size >> 4) + ((size & 15) > 0);
-	while (*p++ == 0xffff)
-	{
+	while (*p++ == 0xffff) {
 		if (--size == 0)
 			return (p - addr) << 4;
 	}
 
-	num = ~*--p;
-	__asm__ __volatile__ ("bfffo %1{#16,#16},%0"
-			      : "=d" (res) : "d" (num & -num));
-	return ((p - addr) << 4) + (res ^ 31);
+	num = *--p;
+	return ((p - addr) << 4) + ffz(num);
 }
 
 #define minix_test_and_set_bit(nr, addr)	__test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))