linux-kernel - Re: [PATCH v2 07/17] cxl: Add new header for call backs and structs

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Message-Id: <20141001120010.4813614016A@ozlabs.org>
Date:	Wed,  1 Oct 2014 22:00:10 +1000 (EST)
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Michael Neuling <mikey@...ling.org>, greg@...ah.com, arnd@...db.de,
	mpe@...erman.id.au, benh@...nel.crashing.org
Cc:	mikey@...ling.org, anton@...ba.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, jk@...abs.org, imunsie@...ibm.com,
	cbe-oss-dev@...ts.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2 07/17] cxl: Add new header for call backs and structs

On Tue, 2014-30-09 at 10:34:56 UTC, Michael Neuling wrote:
> From: Ian Munsie <imunsie@....ibm.com>
> 
> This new header add defines for callbacks and structs needed by the rest of the
                  adds
> kernel to hook into the cxl infrastructure.
> 
> Empty functions are provided when CONFIG CXL_BASE is not enabled.
> 
> Signed-off-by: Ian Munsie <imunsie@....ibm.com>
> Signed-off-by: Michael Neuling <mikey@...ling.org>
> ---
>  include/misc/cxl.h | 34 ++++++++++++++++++++++++++++++++++

include/misc is kind of weird. I guess it's a misc device.

Any reason not to have it in arch/powerpc/include ?

> diff --git a/include/misc/cxl.h b/include/misc/cxl.h
> new file mode 100644
> index 0000000..bde46a3
> --- /dev/null
> +++ b/include/misc/cxl.h
> @@ -0,0 +1,34 @@
> +/*
> + * Copyright 2014 IBM Corp.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version
> + * 2 of the License, or (at your option) any later version.
> + */
> +
> +#ifndef _MISC_ASM_CXL_H

No ASM.

> +#define _MISC_ASM_CXL_H
> +
> +#define CXL_IRQ_RANGES 4
> +
> +struct cxl_irq_ranges {
> +	irq_hw_number_t offset[CXL_IRQ_RANGES];
> +	irq_hw_number_t range[CXL_IRQ_RANGES];
> +};
> +
> +#ifdef CONFIG_CXL_BASE
> +
> +void cxl_slbia(struct mm_struct *mm);
> +void cxl_ctx_get(void);
> +void cxl_ctx_put(void);
> +bool cxl_ctx_in_use(void);
> +
> +#else /* CONFIG_CXL_BASE */
> +
> +#define cxl_slbia(...) do { } while (0)
> +#define cxl_ctx_in_use(...) false

Any reason these shouldn't be static inlines?

cheers
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