[PATCH] powerpc/hugetlb: Add ABI defines for MAP_HUGE_16MB and MAP_HUGE_16GB

[Anshuman Khandual]

On 04/04/2017 02:03 PM, Aneesh Kumar K.V wrote:
> 
> 
> On Tuesday 04 April 2017 11:33 AM, Anshuman Khandual wrote:
>> This just adds user space exported ABI definitions for both 16MB and
>> 16GB non default huge page sizes to be used with mmap() system call.
>>
>> Signed-off-by: Anshuman Khandual <khandual at linux.vnet.ibm.com>
>> ---
>> These defined values will be used along with MAP_HUGETLB while calling
>> mmap() system call if the desired HugeTLB page size is not the default
>> one. Follows similar definitions present in x86.
>>
>> arch/x86/include/uapi/asm/mman.h:#define MAP_HUGE_2MB    (21 <<
>> MAP_HUGE_SHIFT)
>> arch/x86/include/uapi/asm/mman.h:#define MAP_HUGE_1GB    (30 <<
>> MAP_HUGE_SHIFT)
>>
>>  arch/powerpc/include/uapi/asm/mman.h | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/arch/powerpc/include/uapi/asm/mman.h
>> b/arch/powerpc/include/uapi/asm/mman.h
>> index 03c06ba..e78980b 100644
>> --- a/arch/powerpc/include/uapi/asm/mman.h
>> +++ b/arch/powerpc/include/uapi/asm/mman.h
>> @@ -29,4 +29,7 @@
>>  #define MAP_STACK    0x20000        /* give out an address that is
>> best suited for process/thread stacks */
>>  #define MAP_HUGETLB    0x40000        /* create a huge page mapping */
>>
>> +#define MAP_HUGE_16MB    (24 << MAP_HUGE_SHIFT)    /* 16MB HugeTLB
>> Page */
>> +#define MAP_HUGE_16GB    (34 << MAP_HUGE_SHIFT)    /* 16GB HugeTLB
>> Page */
>> +
>>  #endif /* _UAPI_ASM_POWERPC_MMAN_H */
>>
> 
> I am doing a similar patch as part of 1G and hugetlb migration series.
> Can you add 2M and 1G #defines also so that i can drop the patch from my
> series and pick this ?

Sure, will just have to add the two lines from x86 code :)