2 * Copyright (c) 2011 Samsung Electronics
3 * Lukasz Majewski <l.majewski@samsung.com>
5 * This is a Linux kernel compatibility layer for USB Gadget
7 * SPDX-License-Identifier: GPL-2.0+
10 #ifndef __LIN_COMPAT_H__
11 #define __LIN_COMPAT_H__
13 #include <linux/compat.h>
16 #define BITS_PER_BYTE 8
17 #define BITS_TO_LONGS(nr) \
18 DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
19 #define DECLARE_BITMAP(name, bits) \
20 unsigned long name[BITS_TO_LONGS(bits)]
22 #define small_const_nbits(nbits) \
23 (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
25 static inline void bitmap_zero(unsigned long *dst, int nbits)
27 if (small_const_nbits(nbits))
30 int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
35 #define dma_cache_maint(addr, size, mode) cache_flush()
36 void cache_flush(void);
38 #endif /* __LIN_COMPAT_H__ */