Hi Eugene,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on block/for-next]
[also build test ERROR on v4.19-rc3 next-20180911]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Eugene-Korenevsky/efi-take-size-of-partition-entry-from-GPT-header/20180912-054430
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: i386-randconfig-s0-201836 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All error/warnings (new ones prefixed by >>):

   block//partitions/efi.c: In function 'get_gpt_entry':
>> block//partitions/efi.c:670:36: error: 'gpt' undeclared (first use in this function)
     return (gpt_entry *)((u8 *)ptes + gpt->sizeof_partition_entry * index);
                                       ^~~
   block//partitions/efi.c:670:36: note: each undeclared identifier is reported only once for each function it appears in
>> block//partitions/efi.c:671:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^

vim +/gpt +670 block//partitions/efi.c

   667	
   668	static gpt_entry *get_gpt_entry(gpt_header *gpt_hdr, gpt_entry *ptes, u32 index)
   669	{
 > 670		return (gpt_entry *)((u8 *)ptes + gpt->sizeof_partition_entry * index);
 > 671	}
   672	

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