Messages in this thread Patch in this message | | | From | Dominik Dingel <> | Subject | [PATCH 4/4] s390/hugetlb: add hugepages_supported define | Date | Fri, 3 Jul 2015 14:46:09 +0200 |
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On s390 we only can enable hugepages if the underlying hardware/hypervisor also does support this. Common code now would assume this to be signaled by setting HPAGE_SHIFT to 0. But on s390, where we only support one hugepage size, there is a link between HPAGE_SHIFT and pageblock_order.
So instead of setting HPAGE_SHIFT to 0, we will implement the check for the hardware capability.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> --- arch/s390/include/asm/hugetlb.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h index 0130d03..d9be7c0 100644 --- a/arch/s390/include/asm/hugetlb.h +++ b/arch/s390/include/asm/hugetlb.h @@ -14,6 +14,7 @@ #define is_hugepage_only_range(mm, addr, len) 0 #define hugetlb_free_pgd_range free_pgd_range +#define hugepages_supported() (MACHINE_HAS_HPAGE) void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); -- 2.3.8
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