* [patch 064/108] mm/hugetlb: export hugetlb_entry_migration helper
@ 2017-07-06 22:38 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2017-07-06 22:38 UTC (permalink / raw)
To: akpm, aneesh.kumar, benh, khandual, kravetz, mm-commits, mpe,
n-horiguchi, torvalds
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: mm/hugetlb: export hugetlb_entry_migration helper
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>
---
include/linux/hugetlb.h | 1 +
mm/hugetlb.c | 8 ++++----
2 files changed, 5 insertions(+), 4 deletions(-)
diff -puN include/linux/hugetlb.h~mm-hugetlb-export-hugetlb_entry_migration-helper include/linux/hugetlb.h
--- a/include/linux/hugetlb.h~mm-hugetlb-export-hugetlb_entry_migration-helper
+++ a/include/linux/hugetlb.h
@@ -126,6 +126,7 @@ int pud_huge(pud_t pud);
unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
unsigned long address, unsigned long end, pgprot_t newprot);
+bool is_hugetlb_entry_migration(pte_t pte);
#else /* !CONFIG_HUGETLB_PAGE */
static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
diff -puN mm/hugetlb.c~mm-hugetlb-export-hugetlb_entry_migration-helper mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-export-hugetlb_entry_migration-helper
+++ a/mm/hugetlb.c
@@ -3201,17 +3201,17 @@ static void set_huge_ptep_writable(struc
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;
if (huge_pte_none(pte) || pte_present(pte))
- return 0;
+ return false;
swp = pte_to_swp_entry(pte);
if (non_swap_entry(swp) && is_migration_entry(swp))
- return 1;
+ return true;
else
- return 0;
+ return false;
}
static int is_hugetlb_entry_hwpoisoned(pte_t pte)
_
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