linux-kernel - Re: [PATCH V6 3/8] Add helper function to get and convert EFI command line

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Date:	Tue, 14 Jan 2014 11:41:23 -0800
From:	Roy Franz <roy.franz@...aro.org>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Matt Fleming <matt.fleming@...el.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Dave Martin <dave.martin@....com>,
	Mark Salter <msalter@...hat.com>,
	Patch Tracking <patches@...aro.org>
Subject: Re: [PATCH V6 3/8] Add helper function to get and convert EFI command line

On Mon, Jan 13, 2014 at 7:04 AM, Matt Fleming <matt@...sole-pimps.org> wrote:
> On Fri, 10 Jan, at 08:30:12AM, Roy Franz wrote:
>> Add an EFI stub helper function to retrieve the EFI command line using
>> the LOADED_IMAGE_PROTOCOL, and convert it to ASCII.  This function will
>> be shared by the various EFI stub implementations.
>>
>> Signed-off-by: Roy Franz <roy.franz@...aro.org>
>> ---
>>  drivers/firmware/efi/efi-stub-helper.c |   30 ++++++++++++++++++++++++++++++
>>  1 file changed, 30 insertions(+)
>>
>> diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c
>> index eb5d2eb..f657456 100644
>> --- a/drivers/firmware/efi/efi-stub-helper.c
>> +++ b/drivers/firmware/efi/efi-stub-helper.c
>> @@ -637,3 +637,33 @@ static char *efi_convert_cmdline_to_ascii(efi_system_table_t *sys_table_arg,
>>       *cmd_line_len = options_size;
>>       return (char *)cmdline_addr;
>>  }
>> +
>> +/*
>> + * get the command line from EFI, using the LOADED_IMAGE
>> + * protocol, and convert to ASCII.
>> + *
>> + */
>> +static void efi_get_cmdline(efi_system_table_t *sys_table,
>> +                           efi_loaded_image_t **image,
>> +                           void *handle, char **cmdline_ptr)
>> +{
>
> Wouldn't this prototype make more sense?
>
> static char *efi_get_cmdline(efi_system_table_t *sys_table,
>                              efi_loaded_image_t **image,
>                              void *handle);
>
> Is this function really worth implementing at all? Certainly on x86, we
> lookup the loaded image protocol for reasons other than parsing the
> command line, and so would need to do it in the caller anyway.
>
> --
> Matt Fleming, Intel Open Source Technology Center

Yeah, this should just go away.  This was the result of some
over-zealous moving code from arm/arm64 to shared code.

Roy
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