[PATCH v1 04/17] dma-mapping: Add check if IOVA can be used

[Christoph Hellwig]

On Sun, Nov 10, 2024 at 04:09:11PM +0100, Zhu Yanjun wrote:
>> +
>> +/*
>> + * Use the high bit to mark if we used swiotlb for one or more ranges.
>> + */
>> +#define DMA_IOVA_USE_SWIOTLB		(1ULL << 63)
>
> A trivial problem.
> In the above macro, using BIT_ULL(63) is better?

No, and can people please stop suggesting it?  That macro is so fucking
pointless that it's revolting,