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mm/hugetlb: export hugetlb_entry_migration helper

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We will be using this later from the ppc64 code.  Change the return type
to bool.

Link: http://lkml.kernel.org/r/1494926612-23928-4-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aneesh Kumar K.V 2017-07-06 15:38:47 -07:00 committed by Linus Torvalds
parent 080dbb618b
commit d5ed7444da
2 changed files with 5 additions and 4 deletions
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1
include/linux/hugetlb.h
View File

@ -126,6 +126,7 @@ int pud_huge(pud_t pud);
unsigned long hugetlb_change_protection(struct vm_area_struct *vma, unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
unsigned long address, unsigned long end, pgprot_t newprot); unsigned long address, unsigned long end, pgprot_t newprot);
bool is_hugetlb_entry_migration(pte_t pte);
#else /* !CONFIG_HUGETLB_PAGE */ #else /* !CONFIG_HUGETLB_PAGE */
static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)

8
mm/hugetlb.c
View File

@ -3201,17 +3201,17 @@ static void set_huge_ptep_writable(struct vm_area_struct *vma,
update_mmu_cache(vma, address, ptep); update_mmu_cache(vma, address, ptep);
} }
static int is_hugetlb_entry_migration(pte_t pte) bool is_hugetlb_entry_migration(pte_t pte)
{ {
swp_entry_t swp; swp_entry_t swp;
if (huge_pte_none(pte) || pte_present(pte)) if (huge_pte_none(pte) || pte_present(pte))
return 0; return false;
swp = pte_to_swp_entry(pte); swp = pte_to_swp_entry(pte);
if (non_swap_entry(swp) && is_migration_entry(swp)) if (non_swap_entry(swp) && is_migration_entry(swp))
return 1; return true;
else else
return 0; return false;
} }
static int is_hugetlb_entry_hwpoisoned(pte_t pte) static int is_hugetlb_entry_hwpoisoned(pte_t pte)