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