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- #ifndef _LINUX_BITOPS_H
- #define _LINUX_BITOPS_H
- #include <asm/types.h>
- /*
- * Include this here because some architectures need generic_ffs/fls in
- * scope
- */
- #include <asm/bitops.h>
- static __inline__ int get_bitmask_order(unsigned int count)
- {
- int order;
-
- order = fls(count);
- return order; /* We could be slightly more clever with -1 here... */
- }
- static __inline__ int get_count_order(unsigned int count)
- {
- int order;
-
- order = fls(count) - 1;
- if (count & (count - 1))
- order++;
- return order;
- }
- static inline unsigned long hweight_long(unsigned long w)
- {
- return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
- }
- /**
- * rol32 - rotate a 32-bit value left
- * @word: value to rotate
- * @shift: bits to roll
- */
- static inline __u32 rol32(__u32 word, unsigned int shift)
- {
- return (word << shift) | (word >> (32 - shift));
- }
- /**
- * ror32 - rotate a 32-bit value right
- * @word: value to rotate
- * @shift: bits to roll
- */
- static inline __u32 ror32(__u32 word, unsigned int shift)
- {
- return (word >> shift) | (word << (32 - shift));
- }
- static inline unsigned fls_long(unsigned long l)
- {
- if (sizeof(l) == 4)
- return fls(l);
- return fls64(l);
- }
- #endif
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