// nextFreeFast calls sys.TrailingZeros64, which on 386 is implemented in asm and is not inlinable.
		// We currently don't have midstack inlining so nextFreeFast is also not inlinable on 386.
		// On loong64, mips64x and riscv64, TrailingZeros64 is not intrinsified and causes nextFreeFast
		// too expensive to inline (Issue 22239).

		}
		sysHugePage(unsafe.Pointer(l2), unsafe.Sizeof(*l2))
	}
}

// base address for all 0-byte allocations
var zerobase uintptr

// nextFreeFast returns the next free object if one is quickly available.
// Otherwise it returns 0.
func nextFreeFast(s *mspan) gclinkptr {
	theBit := sys.TrailingZeros64(s.allocCache) // Is there a free object in the allocCache?
	if theBit < 64 {
		result := s.freeindex + uint16(theBit)