[PATCH] powerpc/mm: Revert "powerpc/mm: Remove DEBUG_VM_PGTABLE support on powerpc"

[Aneesh Kumar K.V]

On 3/19/21 6:42 AM, Michael Ellerman wrote:
> "Aneesh Kumar K.V" <aneesh.kumar at linux.ibm.com> writes:
>> This reverts commit 675bceb097e6 ("powerpc/mm: Remove DEBUG_VM_PGTABLE support on powerpc")
>>
>> All the related issues are fixed by the series
>> https://lore.kernel.org/linux-mm/20200902114222.181353-1-aneesh.kumar@linux.ibm.com
> 
> Was that series merged?
> 
> If so this seems like this could be tagged as a Fix for the last commit
> in that series.

commit f14312e1ed1e ("mm/debug_vm_pgtable: avoid doing memory allocation 
with pgtable_t mapped.")


> 
> cheers
> 
>> Hence enable it back
>>
>> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>
>> ---
>>   Documentation/features/debug/debug-vm-pgtable/arch-support.txt | 2 +-
>>   arch/powerpc/Kconfig                                           | 1 +
>>   2 files changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/features/debug/debug-vm-pgtable/arch-support.txt b/Documentation/features/debug/debug-vm-pgtable/arch-support.txt
>> index 7aff505af706..fa83403b4aec 100644
>> --- a/Documentation/features/debug/debug-vm-pgtable/arch-support.txt
>> +++ b/Documentation/features/debug/debug-vm-pgtable/arch-support.txt
>> @@ -21,7 +21,7 @@
>>       |       nios2: | TODO |
>>       |    openrisc: | TODO |
>>       |      parisc: | TODO |
>> -    |     powerpc: | TODO |
>> +    |     powerpc: |  ok  |
>>       |       riscv: |  ok  |
>>       |        s390: |  ok  |
>>       |          sh: | TODO |
>> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
>> index 386ae12d8523..982c87d5c051 100644
>> --- a/arch/powerpc/Kconfig
>> +++ b/arch/powerpc/Kconfig
>> @@ -119,6 +119,7 @@ config PPC
>>   	#
>>   	select ARCH_32BIT_OFF_T if PPC32
>>   	select ARCH_HAS_DEBUG_VIRTUAL
>> +	select ARCH_HAS_DEBUG_VM_PGTABLE
>>   	select ARCH_HAS_DEVMEM_IS_ALLOWED
>>   	select ARCH_HAS_ELF_RANDOMIZE
>>   	select ARCH_HAS_FORTIFY_SOURCE
>> -- 
>> 2.30.2