1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (c) 2011 Samsung Electronics
4  * Lukasz Majewski <l.majewski@samsung.com>
5  *
6  * This is a Linux kernel compatibility layer for USB Gadget
7  */
8 
9 #ifndef __LIN_COMPAT_H__
10 #define __LIN_COMPAT_H__
11 
12 #include <linux/bitops.h>
13 #include <linux/compat.h>
14 
15 /* common */
16 #define DECLARE_BITMAP(name, bits) \
17 	unsigned long name[BITS_TO_LONGS(bits)]
18 
19 #define small_const_nbits(nbits) \
20 	(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
21 
bitmap_zero(unsigned long * dst,int nbits)22 static inline void bitmap_zero(unsigned long *dst, int nbits)
23 {
24 	if (small_const_nbits(nbits))
25 		*dst = 0UL;
26 	else {
27 		int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
28 		memset(dst, 0, len);
29 	}
30 }
31 
32 #define dma_cache_maint(addr, size, mode) cache_flush()
33 void cache_flush(void);
34 
35 #endif /* __LIN_COMPAT_H__ */
36