Re: [PATCH v5 1/3] spapr: nvdimm: Forward declare and move the definitions

From: David Gibson <david@gibson.dropbear.id.au>
To: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Cc: groug@kaod.org, qemu-ppc@nongnu.org, qemu-devel@nongnu.org,
	aneesh.kumar@linux.ibm.com, nvdimm@lists.linux.dev,
	kvm-ppc@vger.kernel.org, shivaprasadbhat@gmail.com,
	bharata@linux.vnet.ibm.com
Subject: Re: [PATCH v5 1/3] spapr: nvdimm: Forward declare and move the definitions
Date: Mon, 24 May 2021 14:45:23 +1000	[thread overview]
Message-ID: <YKsvY5h837sbO3UB@yekko> (raw)
In-Reply-To: <162133925415.610.11584121797866216417.stgit@4f1e6f2bd33e>

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On Tue, May 18, 2021 at 08:03:17AM -0400, Shivaprasad G Bhat wrote:
> The subsequent patches add definitions which tend to get
> the compilation to cyclic dependency. So, prepare with
> forward declarations, move the definitions and clean up.
> 
> Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>

This is a reasonable cleanup regardless of the rest of the series, so
I've applied this to ppc-for-6.1.

> ---
>  hw/ppc/spapr_nvdimm.c         |   12 ++++++++++++
>  include/hw/ppc/spapr_nvdimm.h |   14 ++------------
>  2 files changed, 14 insertions(+), 12 deletions(-)
> 
> diff --git a/hw/ppc/spapr_nvdimm.c b/hw/ppc/spapr_nvdimm.c
> index 252204e25f..3f57a8b6fa 100644
> --- a/hw/ppc/spapr_nvdimm.c
> +++ b/hw/ppc/spapr_nvdimm.c
> @@ -35,6 +35,18 @@
>  /* SCM device is unable to persist memory contents */
>  #define PAPR_PMEM_UNARMED PPC_BIT(0)
>  
> +/*
> + * The nvdimm size should be aligned to SCM block size.
> + * The SCM block size should be aligned to SPAPR_MEMORY_BLOCK_SIZE
> + * in order to have SCM regions not to overlap with dimm memory regions.
> + * The SCM devices can have variable block sizes. For now, fixing the
> + * block size to the minimum value.
> + */
> +#define SPAPR_MINIMUM_SCM_BLOCK_SIZE SPAPR_MEMORY_BLOCK_SIZE
> +
> +/* Have an explicit check for alignment */
> +QEMU_BUILD_BUG_ON(SPAPR_MINIMUM_SCM_BLOCK_SIZE % SPAPR_MEMORY_BLOCK_SIZE);
> +
>  bool spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
>                             uint64_t size, Error **errp)
>  {
> diff --git a/include/hw/ppc/spapr_nvdimm.h b/include/hw/ppc/spapr_nvdimm.h
> index 73be250e2a..764f999f54 100644
> --- a/include/hw/ppc/spapr_nvdimm.h
> +++ b/include/hw/ppc/spapr_nvdimm.h
> @@ -11,19 +11,9 @@
>  #define HW_SPAPR_NVDIMM_H
>  
>  #include "hw/mem/nvdimm.h"
> -#include "hw/ppc/spapr.h"
>  
> -/*
> - * The nvdimm size should be aligned to SCM block size.
> - * The SCM block size should be aligned to SPAPR_MEMORY_BLOCK_SIZE
> - * inorder to have SCM regions not to overlap with dimm memory regions.
> - * The SCM devices can have variable block sizes. For now, fixing the
> - * block size to the minimum value.
> - */
> -#define SPAPR_MINIMUM_SCM_BLOCK_SIZE SPAPR_MEMORY_BLOCK_SIZE
> -
> -/* Have an explicit check for alignment */
> -QEMU_BUILD_BUG_ON(SPAPR_MINIMUM_SCM_BLOCK_SIZE % SPAPR_MEMORY_BLOCK_SIZE);
> +typedef struct SpaprDrc SpaprDrc;
> +typedef struct SpaprMachineState SpaprMachineState;
>  
>  int spapr_pmem_dt_populate(SpaprDrc *drc, SpaprMachineState *spapr,
>                             void *fdt, int *fdt_start_offset, Error **errp);
> 
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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