1 #ifndef _KVM_LINUX_BITOPS_H_ 2 #define _KVM_LINUX_BITOPS_H_ 3 4 #include <bits/wordsize.h> 5 6 #include <linux/kernel.h> 7 #include <linux/compiler.h> 8 #include <asm/hweight.h> 9 10 #define BITS_PER_LONG __WORDSIZE 11 #define BITS_PER_BYTE 8 12 #define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long)) 13 14 static inline void set_bit(int nr, unsigned long *addr) 15 { 16 addr[nr / BITS_PER_LONG] |= 1UL << (nr % BITS_PER_LONG); 17 } 18 19 static inline void clear_bit(int nr, unsigned long *addr) 20 { 21 addr[nr / BITS_PER_LONG] &= ~(1UL << (nr % BITS_PER_LONG)); 22 } 23 24 static __always_inline int test_bit(unsigned int nr, const unsigned long *addr) 25 { 26 return ((1UL << (nr % BITS_PER_LONG)) & 27 (((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0; 28 } 29 30 static inline unsigned long hweight_long(unsigned long w) 31 { 32 return sizeof(w) == 4 ? hweight32(w) : hweight64(w); 33 } 34 35 #endif 36