fls64.h

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#ifndef _ASM_GENERIC_BITOPS_FLS64_H_
#define _ASM_GENERIC_BITOPS_FLS64_H_

#include <asm/types.h>

#if BITS_PER_LONG == 32
static __always_inline int fls64(__u64 x)
{
    __u32 h = x >> 32;
    if (h)
        return fls(h) + 32;
    return fls(x);
}
#elif BITS_PER_LONG == 64
static __always_inline int fls64(__u64 x)
{
    if (x == 0)
        return 0;
    return __fls(x) + 1;
}
#else
#error BITS_PER_LONG not 32 or 64
#endif

#endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */