diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2014-11-05 21:57:39 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-11-14 17:24:21 +1100 |
| commit | 06743521d0eae1263a09bccb1a92a9fbb94660b3 (patch) | |
| tree | 6cfd2a29bb7abe82501c64676f35ead205079ffd /arch/powerpc/mm | |
| parent | 9e819963b45f79e87f5a8c44960a66c0727c80e6 (diff) | |
powerpc/mm: Add missing pmd accessors
This patch add documentation and missing accessors.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/mm/pgtable_64.c | 22 |
2 files changed, 22 insertions, 3 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index b460e723f0ec..2b8e5ed28831 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -62,6 +62,9 @@ static unsigned nr_gpages; /* * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD; + * + * Defined in such a way that we can optimize away code block at build time + * if CONFIG_HUGETLB_PAGE=n. */ int pmd_huge(pmd_t pmd) { diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index e0c718543174..87ff0c1908a9 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -35,6 +35,7 @@ #include <linux/vmalloc.h> #include <linux/memblock.h> #include <linux/slab.h> +#include <linux/hugetlb.h> #include <asm/pgalloc.h> #include <asm/page.h> @@ -344,16 +345,31 @@ EXPORT_SYMBOL(iounmap); EXPORT_SYMBOL(__iounmap); EXPORT_SYMBOL(__iounmap_at); +#ifndef __PAGETABLE_PUD_FOLDED +/* 4 level page table */ +struct page *pgd_page(pgd_t pgd) +{ + if (pgd_huge(pgd)) + return pte_page(pgd_pte(pgd)); + return virt_to_page(pgd_page_vaddr(pgd)); +} +#endif + +struct page *pud_page(pud_t pud) +{ + if (pud_huge(pud)) + return pte_page(pud_pte(pud)); + return virt_to_page(pud_page_vaddr(pud)); +} + /* * For hugepage we have pfn in the pmd, we use PTE_RPN_SHIFT bits for flags * For PTE page, we have a PTE_FRAG_SIZE (4K) aligned virtual address. */ struct page *pmd_page(pmd_t pmd) { -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - if (pmd_trans_huge(pmd)) + if (pmd_trans_huge(pmd) || pmd_huge(pmd)) return pfn_to_page(pmd_pfn(pmd)); -#endif return virt_to_page(pmd_page_vaddr(pmd)); } |