linux-kernel - RE: [PATCH 2/4] ACPI/MRRM: Create /sys/devices/system/memory/rangeX ABI

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Message-ID: <SJ1PR11MB6083FF509571697CE3DB280AFCFD2@SJ1PR11MB6083.namprd11.prod.outlook.com>
Date: Tue, 11 Feb 2025 00:21:24 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: "Moore, Robert" <robert.moore@...el.com>, "Wysocki, Rafael J"
	<rafael.j.wysocki@...el.com>, Len Brown <lenb@...nel.org>
CC: "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"acpica-devel@...ts.linux.dev" <acpica-devel@...ts.linux.dev>, "Thomas
 Gleixner" <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "Borislav
 Petkov" <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
	"x86@...nel.org" <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, "David
 Hildenbrand" <david@...hat.com>, Oscar Salvador <osalvador@...e.de>, "Greg
 Kroah-Hartman" <gregkh@...uxfoundation.org>, Danilo Krummrich
	<dakr@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/4] ACPI/MRRM: Create /sys/devices/system/memory/rangeX
 ABI

> diff --git a/include/linux/memory.h b/include/linux/memory.h
> index c0afee5d126e..0a21943ce44d 100644
> --- a/include/linux/memory.h
> +++ b/include/linux/memory.h
> @@ -189,4 +189,13 @@ void memory_block_add_nid(struct memory_block *mem, int nid,
>   */
>  extern struct mutex text_mutex;
>
> +#ifdef CONFIG_ACPI_MRRM
> +int mrrm_max_mem_region(void);
> +int memory_subsys_device_register(struct device *dev);
> +#else
> +static inline int mrrm_max_mem_region(void) { return -EONENT; }

The lkp robot just pointed out my spelling error. Should be ENOENT.

> +static inline int memory_subsys_device_register(struct device *dev) { return -EINVAL; }
> +#define memory_subsys_device_register memory_subsys_device_register
> +#endif
> +
>  #endif /* _LINUX_MEMORY_H_ */

-Tony