modify file names and create directories

arch/x86/kernel/include/bitops.h

@@ -0,0 +1,15 @@
+#ifndef HEADER_X86_COMMON_BITOPS_H
+#define HEADER_X86_COMMON_BITOPS_H
+
+static inline int fls(int x)
+{
+	int r;
+	asm("bsrl %1,%0\n\t"
+	    "jnz 1f\n\t"
+	    "movl $-1,%0\n"
+	    "1:" : "=r" (r) : "rm" (x));
+
+	return r + 1;
+}
+
+#endif