Re: [PATCH 06/15] powerpc: fadamp: simplify fadump_reserve_crash_area()

Michael Ellerman
2020-08-02T13:14:29Z

Mike Rapoport <rppt@kernel.org> writes:
> On Thu, Jul 30, 2020 at 10:15:13PM +1000, Michael Ellerman wrote:
>> Mike Rapoport <rppt@kernel.org> writes:
>> > From: Mike Rapoport <rppt@linux.ibm.com>
>> >
>> > fadump_reserve_crash_area() reserves memory from a specified base address
>> > till the end of the RAM.
>> >
>> > Replace iteration through the memblock.memory with a single call to
>> > memblock_reserve() with appropriate that will take care of proper memory
>> ^
>> parameters?
>> > reservation.
>> >
>> > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
>> > ---
>> > arch/powerpc/kernel/fadump.c | 20 +-------------------
>> > 1 file changed, 1 insertion(+), 19 deletions(-)
>>
>> I think this looks OK to me, but I don't have a setup to test it easily.
>> I've added Hari to Cc who might be able to.
>>
>> But I'll give you an ack in the hope that it works :)
>
> Actually, I did some digging in the git log and the traversal was added
> there on purpose by the commit b71a693d3db3 ("powerpc/fadump: exclude
> memory holes while reserving memory in second kernel")
> Presuming this is still reqruired I'm going to drop this patch and will
> simply replace for_each_memblock() with for_each_mem_range() in v2.

Thanks.

cheers