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author	Nitin Gupta <nitin.m.gupta@oracle.com>
	Fri, 29 Jul 2016 07:54:21 +0000 (00:54 -0700)
committer	David S. Miller <davem@davemloft.net>
	Fri, 29 Jul 2016 17:49:16 +0000 (10:49 -0700)
commit	7bc3777ca19cf9ecc5533980210f29c51df7fe5e
tree	baaa60bd0a6dfe46a902d7e151005b013f340e7f	tree \| snapshot
parent	af1b1a9b36b8f9d583d4b4f90dd8946ed0cd4bd0	commit \| diff

sparc64: Trim page tables for 8M hugepages

For PMD aligned (8M) hugepages, we currently allocate
all four page table levels which is wasteful. We now
allocate till PMD level only which saves memory usage
from page tables.

Also, when freeing page table for 8M hugepage backed region,
make sure we don't try to access non-existent PTE level.

Orabug: 22630259

Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

John Crispins staging tree

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arch/sparc/include/asm/hugetlb.h		diff \| blob \| history
arch/sparc/include/asm/pgtable_64.h		diff \| blob \| history
arch/sparc/include/asm/tsb.h		diff \| blob \| history
arch/sparc/mm/fault_64.c		diff \| blob \| history
arch/sparc/mm/hugetlbpage.c		diff \| blob \| history
arch/sparc/mm/init_64.c		diff \| blob \| history