Re: git: 60381fd1ee86 - main - memdesc: Retire MEMDESC_CCB.

From: Konstantin Belousov <kostikbel_at_gmail.com>
Date: Mon, 17 Jul 2023 15:48:29 UTC
On Fri, Jul 14, 2023 at 06:41:03PM +0000, John Baldwin wrote:
> The branch main has been updated by jhb:
> 
> URL: https://cgit.FreeBSD.org/src/commit/?id=60381fd1ee8668ea1e4676a6128883d987cab858
> 
> commit 60381fd1ee8668ea1e4676a6128883d987cab858
> Author:     John Baldwin <jhb@FreeBSD.org>
> AuthorDate: 2023-07-14 18:30:31 +0000
> Commit:     John Baldwin <jhb@FreeBSD.org>
> CommitDate: 2023-07-14 18:32:16 +0000
> 
>     memdesc: Retire MEMDESC_CCB.
>     
>     Instead, change memdesc_ccb to examine the CCB and return a memdesc of
>     a more generic type describing the data buffer.

> diff --git a/sys/kern/subr_bus_dma.c b/sys/kern/subr_bus_dma.c
> index 65a08aeba17c..bfaad30b37d3 100644
> --- a/sys/kern/subr_bus_dma.c
> +++ b/sys/kern/subr_bus_dma.c
> @@ -304,94 +304,6 @@ bus_dmamap_load_ma_triv(bus_dma_tag_t dmat, bus_dmamap_t map,
> @@ -566,49 +478,18 @@ bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
> +	mem = memdesc_ccb(ccb);
> +	return (bus_dmamap_load_mem(dmat, map, &mem, callback, callback_arg,
> +	    flags));
>  }
This makes kernel not linkable if CAM is not included into it.