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• This comparison shows the changes necessary to convert path

  → /drivers/include/linux/log2.h @ 6935

  → /drivers/include/linux/log2.h @ 6936

  ↔ Reverse comparison

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Regard whitespace Rev 6935 → Rev 6936

/drivers/include/linux/log2.h
16,6 → 16,12
#include <linux/bitops.h>
/*
* deal with unrepresentable constant logarithms
*/
extern __attribute__((const, noreturn))
int ____ilog2_NaN(void);
/*
* non-constant log of base 2 calculators
* - the arch may override these in asm/bitops.h if they can be implemented
* more efficiently than using fls() and fls64()
79,7 → 85,7
#define ilog2(n) \
( \
__builtin_constant_p(n) ? ( \
(n) < 2 ? 0 : \
(n) < 1 ? ____ilog2_NaN() : \
(n) & (1ULL << 63) ? 63 : \
(n) & (1ULL << 62) ? 62 : \
(n) & (1ULL << 61) ? 61 : \
142,7 → 148,10
(n) & (1ULL << 4) ? 4 : \
(n) & (1ULL << 3) ? 3 : \
(n) & (1ULL << 2) ? 2 : \
1 ) : \
(n) & (1ULL << 1) ? 1 : \
(n) & (1ULL << 0) ? 0 : \
____ilog2_NaN() \
) : \
(sizeof(n) <= 4) ? \
__ilog2_u32(n) : \
__ilog2_u64(n) \
194,17 → 203,6
* ... and so on.
*/
static inline __attribute_const__
int __order_base_2(unsigned long n)
{
return n > 1 ? ilog2(n - 1) + 1 : 0;
}
#define order_base_2(n) ilog2(roundup_pow_of_two(n))
#define order_base_2(n) \
( \
__builtin_constant_p(n) ? ( \
((n) == 0 || (n) == 1) ? 0 : \
ilog2((n) - 1) + 1) : \
__order_base_2(n) \
)
#endif /* _LINUX_LOG2_H */