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38517a78 ŁM |
1 | /* |
2 | * Copyright (c) 2011 Samsung Electronics | |
3 | * Lukasz Majewski <l.majewski@samsung.com> | |
4 | * | |
5 | * This is a Linux kernel compatibility layer for USB Gadget | |
6 | * | |
1a459660 | 7 | * SPDX-License-Identifier: GPL-2.0+ |
38517a78 ŁM |
8 | */ |
9 | ||
10 | #ifndef __LIN_COMPAT_H__ | |
11 | #define __LIN_COMPAT_H__ | |
12 | ||
ed3986ca | 13 | #include <linux/bitops.h> |
6777a3cf MF |
14 | #include <linux/compat.h> |
15 | ||
38517a78 | 16 | /* common */ |
7010f5b9 ŁM |
17 | #define DECLARE_BITMAP(name, bits) \ |
18 | unsigned long name[BITS_TO_LONGS(bits)] | |
19 | ||
20 | #define small_const_nbits(nbits) \ | |
21 | (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG) | |
22 | ||
23 | static inline void bitmap_zero(unsigned long *dst, int nbits) | |
24 | { | |
25 | if (small_const_nbits(nbits)) | |
26 | *dst = 0UL; | |
27 | else { | |
28 | int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long); | |
29 | memset(dst, 0, len); | |
30 | } | |
31 | } | |
32 | ||
38517a78 ŁM |
33 | #define dma_cache_maint(addr, size, mode) cache_flush() |
34 | void cache_flush(void); | |
35 | ||
36 | #endif /* __LIN_COMPAT_H__ */ |