diff options
Diffstat (limited to 'include/linux/bitops.h')
| -rw-r--r-- | include/linux/bitops.h | 48 |
1 files changed, 28 insertions, 20 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index dd13bf9311..7646e15634 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -1,29 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + #ifndef _LINUX_BITOPS_H #define _LINUX_BITOPS_H -#include <asm/types.h> + +#include <linux/types.h> +#include <linux/const.h> +#include <linux/bits.h> #ifdef __KERNEL__ -#define BIT(nr) (1UL << (nr)) -#define BIT_ULL(nr) (1ULL << (nr)) -#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) -#define BIT_WORD(nr) ((nr) / BITS_PER_LONG) -#define BIT_ULL_MASK(nr) (1ULL << ((nr) % BITS_PER_LONG_LONG)) -#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG) -#define BITS_PER_BYTE 8 -#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long)) +#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE) +#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long)) +#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u64)) +#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32)) +#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char)) +#define BYTES_TO_BITS(nb) (((BITS_PER_LONG * (nb)) / sizeof(long))) #endif -/* - * Create a contiguous bitmask starting at bit position @l and ending at - * position @h. For example - * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000. - */ -#define GENMASK(h, l) \ - (((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h)))) - -#define GENMASK_ULL(h, l) \ - (((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h)))) - +#ifndef __ASSEMBLY__ /* * Include this here because some architectures need generic_ffs/fls in * scope @@ -192,6 +185,20 @@ static inline unsigned long __ffs64(u64 word) return __ffs((unsigned long)word); } +/** + * assign_bit - Assign value to a bit in memory + * @nr: the bit to set + * @addr: the address to start counting from + * @value: the value to assign + */ +static inline void assign_bit(long nr, volatile unsigned long *addr, bool value) +{ + if (value) + set_bit(nr, addr); + else + clear_bit(nr, addr); +} + #ifdef __KERNEL__ #ifndef set_mask_bits @@ -221,5 +228,6 @@ extern unsigned long find_last_bit(const unsigned long *addr, unsigned long size); #endif +#endif /* !(__ASSEMBLY__) */ #endif /* __KERNEL__ */ #endif |