| Lukasz Majewski | 916fa097 | 2018-11-23 17:36:19 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | #ifndef __LINUX_BITMAP_H |
| 3 | #define __LINUX_BITMAP_H |
| 4 | |
| 5 | #include <asm/types.h> |
| 6 | #include <linux/types.h> |
| 7 | #include <linux/bitops.h> |
| 8 | |
| 9 | #define small_const_nbits(nbits) \ |
| 10 | (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG) |
| 11 | |
| 12 | static inline void bitmap_zero(unsigned long *dst, int nbits) |
| 13 | { |
| 14 | if (small_const_nbits(nbits)) { |
| 15 | *dst = 0UL; |
| 16 | } else { |
| 17 | int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long); |
| 18 | |
| 19 | memset(dst, 0, len); |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | #endif /* __LINUX_BITMAP_H */ |