linux-kernel - Re: [patch 1/7 v2] Add function efi_remap_region for remapping to saved virt address

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Date:	Fri, 15 Nov 2013 16:02:05 -0700
From:	Toshi Kani <toshi.kani@...com>
To:	dyoung@...hat.com
Cc:	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	x86@...nel.org, mjg59@...f.ucam.org, hpa@...or.com,
	James.Bottomley@...senPartnership.com, vgoyal@...hat.com,
	ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.infradead.org, bp@...en8.de
Subject: Re: [patch 1/7 v2] Add function efi_remap_region for remapping to
 saved virt address

On Tue, 2013-11-05 at 16:20 +0800, dyoung@...hat.com wrote:
> Kexec kernel will use saved runtime virtual mapping, so add a
> new function efi_remap_region to remapping it directly without
> calculate the virt addr from efi_va.
> 
> The md is passed in from 1st kernel, the virtual addr is
> saved in md->virt_addr.

 :

> +/*
> + * kexec kernel will use efi_map_region_fixed to map efi
> + * runtime memory ranges. md->virt_addr is the original virtual
> + * address which had been mapped in kexec 1st kernel.
> + */
> +void __init efi_map_region_fixed(efi_memory_desc_t *md)

Can you simply use __map_region() instead of creating this function?
Both functions seem to do the same thing.  (In __map_region(), size and
end are not used.)

Thanks,
-Toshi

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