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s390/mm: don't set ARCH_KEEP_MEMBLOCK

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Commit 50be634507 ("s390/mm: Convert bootmem to memblock") mentions
	"The original bootmem allocator is getting replaced by memblock. To
	cover the needs of the s390 kdump implementation the physical
	memory list is used."

As we can now reference "physmem" managed in the memblock allocator after
init even without ARCH_KEEP_MEMBLOCK, and s390x does no longer need
other memblock metadata after boot (esp., the zcore memmap device that used
it got removed), we can stop setting ARCH_KEEP_MEMBLOCK.

With this change, we no longer create memblocks for standby/hotplugged
memory (added via add_memory()) and free up memblock metadata (except
physmem) after boot.

Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Philipp Rudo <prudo@linux.ibm.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200701141830.18749-3-david@redhat.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
David Hildenbrand 2020-07-01 16:18:30 +02:00 committed by Heiko Carstens
parent 7764990581
commit fa49066fc3
1 changed files with 0 additions and 1 deletions
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arch/s390/Kconfig
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@ -102,7 +102,6 @@ config S390
select ARCH_INLINE_WRITE_UNLOCK_BH
select ARCH_INLINE_WRITE_UNLOCK_IRQ
select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
select ARCH_KEEP_MEMBLOCK
select ARCH_STACKWALK
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_NUMA_BALANCING