[PATCH RFC 2/4] block: Add BLK_FEAT_ATOMIC_WRITES flag

[Christoph Hellwig]

> @@ -176,7 +176,7 @@ static void blk_validate_atomic_write_limits(struct queue_limits *lim)
>  {
>  	unsigned int boundary_sectors;
>  
> -	if (!lim->atomic_write_hw_max)
> +	if (!(lim->features & BLK_FEAT_ATOMIC_WRITES) || !lim->atomic_write_hw_max)

Overly long line here.

Otherwise this looks good:

Reviewed-by: Christoph Hellwig <hch at lst.de>