[PATCH RFC v2] nvme: basic RMEDIA support for host

[Christoph Hellwig]

On Wed, Jul 24, 2024 at 08:30:52PM +0800, Wang Yugui wrote:
> Rotational media(RMEDIA) support is added to the NVMe 2.0 specification.
> We firstly add Rotational media(RMEDIA) support to nvme host, then we can add
> the support to nvme target later if the backstore is a Rotational media(RMEDIA)
> block device.

I'd reword this a bit:

Subject: nvme: add support for the rotational media flag

Add support for the rotational media (RMEDIA) flag in the NVMe 2.0
specification by propagating it to the block layer BLK_FEAT_ROTATIONAL
flag.

> +	bool is_rmedia;

I'd stick to the Linux 'rotational' terminology here, i.e.
is_rotational.

> +	if(head->rmedia)

missing whitespace after the if here.

But as blk_stack_limits inherits BLK_FEAT_ROTATIONAL I think this
shouldn't even be needed at all.