/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASM_GENERIC_BITOPS_FLS64_H_#define _ASM_GENERIC_BITOPS_FLS64_H_ #include <asm/types.h> /** * fls64 - find last set bit in a 64-bit word * @x: the word to search * * This is defined in a similar way as the libc and compiler builtin * ffsll, but returns the position of the most significant set bit. * * fls64(value) returns 0 if value is 0 or the position of the last * set bit if value is nonzero. The last (most significant) bit is * at position 64. */#if BITS_PER_LONG == 32static __always_inline __attribute_const__ int fls64(__u64 x){	__u32 h = x >> 32;	if (h)		return fls(h) + 32;	return fls(x);}#elif BITS_PER_LONG == 64static __always_inline __attribute_const__ 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_ */