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/compat.h> 14 15 /* common */ 16 #define ENOTSUPP 524 /* Operation is not supported */ 17 18 #define BITS_PER_BYTE 8 19 #define BITS_TO_LONGS(nr) \ 20 DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long)) 21 #define DECLARE_BITMAP(name, bits) \ 22 unsigned long name[BITS_TO_LONGS(bits)] 23 24 #define small_const_nbits(nbits) \ 25 (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG) 26 27 static inline void bitmap_zero(unsigned long *dst, int nbits) 28 { 29 if (small_const_nbits(nbits)) 30 *dst = 0UL; 31 else { 32 int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long); 33 memset(dst, 0, len); 34 } 35 } 36 37 #define dma_cache_maint(addr, size, mode) cache_flush() 38 void cache_flush(void); 39 40 #endif /* __LIN_COMPAT_H__ */ 41