include/usb/lin_gadget_compat.h

   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
  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__ */