linux-kernel - Re: [PATCH] export efi.flags to sysfs

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Message-ID: <20140527133411.GG10994@redhat.com>
Date:	Tue, 27 May 2014 09:34:11 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Dave Young <dyoung@...hat.com>
Cc:	matt.fleming@...el.com, bp@...en8.de, linux-kernel@...r.kernel.org,
	linux-efi@...r.kernel.org
Subject: Re: [PATCH] export efi.flags to sysfs

On Mon, May 26, 2014 at 04:39:35PM +0800, Dave Young wrote:
> 
> For efi=old_map and any old_map quirks like SGI UV in current
> tree kexec/kdump will fail because it depends on the new 1:1 mapping.
> 
> Thus export the mapping method to sysfs so kexec tools can switch
> to original way to boot.
> 
> Since we have efi.flags for all efi facilities so let's just export the
> efi.flags itself, it maybe useful for other arches and use cases.
> 

Does it require any documentation in Documentation/ABI/..

Vivek

> Signed-off-by: Dave Young <dyoung@...hat.com>
> ---
>  drivers/firmware/efi/efi.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> Index: linux-2.6/drivers/firmware/efi/efi.c
> ===================================================================
> --- linux-2.6.orig/drivers/firmware/efi/efi.c
> +++ linux-2.6/drivers/firmware/efi/efi.c
> @@ -86,16 +86,19 @@ static ssize_t name##_show(struct kobjec
>  EFI_ATTR_SHOW(fw_vendor);
>  EFI_ATTR_SHOW(runtime);
>  EFI_ATTR_SHOW(config_table);
> +EFI_ATTR_SHOW(flags);
>  
>  static struct kobj_attribute efi_attr_fw_vendor = __ATTR_RO(fw_vendor);
>  static struct kobj_attribute efi_attr_runtime = __ATTR_RO(runtime);
>  static struct kobj_attribute efi_attr_config_table = __ATTR_RO(config_table);
> +static struct kobj_attribute efi_attr_flags = __ATTR_RO(flags);
>  
>  static struct attribute *efi_subsys_attrs[] = {
>  	&efi_attr_systab.attr,
>  	&efi_attr_fw_vendor.attr,
>  	&efi_attr_runtime.attr,
>  	&efi_attr_config_table.attr,
> +	&efi_attr_flags.attr,
>  	NULL,
>  };
>  
--
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