[PATCH v5 15/32] efi: Update efi_mem_type() to return an error rather than 0

[Tom Lendacky]

On 5/7/2017 12:18 PM, Borislav Petkov wrote:
> On Tue, Apr 18, 2017 at 04:19:00PM -0500, Tom Lendacky wrote:
>> The efi_mem_type() function currently returns a 0, which maps to
>> EFI_RESERVED_TYPE, if the function is unable to find a memmap entry for
>> the supplied physical address. Returning EFI_RESERVED_TYPE implies that
>> a memmap entry exists, when it doesn't.  Instead of returning 0, change
>> the function to return a negative error value when no memmap entry is
>> found.
>>
>> Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
>> ---
>
> ...
>
>> diff --git a/include/linux/efi.h b/include/linux/efi.h
>> index cd768a1..a27bb3f 100644
>> --- a/include/linux/efi.h
>> +++ b/include/linux/efi.h
>> @@ -973,7 +973,7 @@ static inline void efi_esrt_init(void) { }
>>  extern int efi_config_parse_tables(void *config_tables, int count, int sz,
>>  				   efi_config_table_type_t *arch_tables);
>>  extern u64 efi_get_iobase (void);
>> -extern u32 efi_mem_type (unsigned long phys_addr);
>> +extern int efi_mem_type (unsigned long phys_addr);
>
> WARNING: space prohibited between function name and open parenthesis '('
> #101: FILE: include/linux/efi.h:976:
> +extern int efi_mem_type (unsigned long phys_addr);
>
> Please integrate scripts/checkpatch.pl in your patch creation workflow.
> Some of the warnings/errors *actually* make sense.

I do/did run scripts/checkpatch.pl against all my patches. In this case
I chose to keep the space in order to stay consistent with some of the
surrounding functions.  No problem though, I can remove the space.

Thanks,
Tom

>
> I know, the other function prototypes have a space too but that's not
> our coding style. Looks like this trickled in from ia64, from looking at
> arch/ia64/kernel/efi.c.
>