Re: [PATCH v6 03/13] iomap: rework IOMAP atomic flags

[Christoph Hellwig]

>  		iomap->flags |= IOMAP_F_NEW;
>  
> +	if (flags & IOMAP_ATOMIC)
> +		iomap->flags |= IOMAP_F_ATOMIC_BIO;
> +

Add a comment here that ext4 is always using hardware atomics?

> +	if (flags & IOMAP_ATOMIC)
> +		iomap_flags |= IOMAP_F_ATOMIC_BIO;

Same here (at least for now until it is changed later).

> + * IOMAP_F_ATOMIC_BIO indicates that (write) I/O needs to be issued as an
> + * atomic bio, i.e. set REQ_ATOMIC.

s/needs to/will be/ ?