powerpc/mm: Cleanup initialization of hugepages on powerpc

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This patch simplifies the logic used to initialize hugepages on
powerpc.  The somewhat oddly named set_huge_psize() is renamed to
add_huge_page_size() and now does all necessary verification of
whether it's given a valid hugepage sizes (instead of just some) and
instantiates the generic hstate structure (but no more).

hugetlbpage_init() now steps through the available pagesizes, checks
if they're valid for hugepages by calling add_huge_page_size() and
initializes the kmem_caches for the hugepage pagetables.  This means
we can now eliminate the mmu_huge_psizes array, since we no longer
need to pass the sizing information for the pagetable caches from
set_huge_psize() into hugetlbpage_init()

Determination of the default huge page size is also moved from the
hash code into the general hugepage code.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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This commit is contained in:

David Gibson 2009-10-26 19:24:31 +00:00 • committed by Benjamin Herrenschmidt

parent a4fe3ce769

commit d1837cba5d

3 changed files with 63 additions and 77 deletions

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2

arch/powerpc/include/asm/page_64.h

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10

arch/powerpc/mm/hash_utils_64.c

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130

arch/powerpc/mm/hugetlbpage.c

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