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 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #ifndef __LIN_COMPAT_H__ 11 #define __LIN_COMPAT_H__ 12 13 #include <linux/bitops.h> 14 #include <linux/compat.h> 15 16 /* common */ 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 bitmap_zero(unsigned long * dst,int nbits)23static 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 33 #define dma_cache_maint(addr, size, mode) cache_flush() 34 void cache_flush(void); 35 36 #endif /* __LIN_COMPAT_H__ */ 37