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-rw-r--r--arch/powerpc/mm/hugetlbpage.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 33b3461d91e8..de54d2a37830 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -558,7 +558,7 @@ unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
return vma_kernel_pagesize(vma);
}
-static int __init add_huge_page_size(unsigned long long size)
+bool __init arch_hugetlb_valid_size(unsigned long size)
{
int shift = __ffs(size);
int mmu_psize;
@@ -566,20 +566,26 @@ static int __init add_huge_page_size(unsigned long long size)
/* Check that it is a page size supported by the hardware and
* that it fits within pagetable and slice limits. */
if (size <= PAGE_SIZE || !is_power_of_2(size))
- return -EINVAL;
+ return false;
mmu_psize = check_and_get_huge_psize(shift);
if (mmu_psize < 0)
- return -EINVAL;
+ return false;
BUG_ON(mmu_psize_defs[mmu_psize].shift != shift);
- /* Return if huge page size has already been setup */
- if (size_to_hstate(size))
- return 0;
+ return true;
+}
- hugetlb_add_hstate(shift - PAGE_SHIFT);
+static int __init add_huge_page_size(unsigned long long size)
+{
+ int shift = __ffs(size);
+
+ if (!arch_hugetlb_valid_size((unsigned long)size))
+ return -EINVAL;
+ if (!size_to_hstate(size))
+ hugetlb_add_hstate(shift - PAGE_SHIFT);
return 0;
}