lib: delete lib/find_last_bit.c

/* find_last_bit.c: fallback find next bit implementation

 *

 * Copyright (C) 2008 IBM Corporation

 * Written by Rusty Russell <rusty@rustcorp.com.au>

 * (Inspired by David Howell's find_next_bit implementation)

 *

 * Rewritten by Yury Norov <yury.norov@gmail.com> to decrease

 * size and improve performance, 2015.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version

 * 2 of the License, or (at your option) any later version.

 */

#include <linux/bitops.h>

#include <linux/bitmap.h>

#include <linux/export.h>

#include <linux/kernel.h>

#ifndef find_last_bit

unsigned long find_last_bit(const unsigned long *addr, unsigned long size)

{

	if (size) {

		unsigned long val = BITMAP_LAST_WORD_MASK(size);

		unsigned long idx = (size-1) / BITS_PER_LONG;

		do {

			val &= addr[idx];

			if (val)

				return idx * BITS_PER_LONG + __fls(val);

			val = ~0ul;

		} while (idx--);

	}

	return size;

}

EXPORT_SYMBOL(find_last_bit);

#endif