aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm64/mm/hugetlbpage.c
diff options
context:
space:
mode:
authorSteve Capper <steve.capper@arm.com>2017-08-22 11:42:42 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2017-08-22 15:51:55 +0100
commitb5b0be86d7181ed82cee9d8ac5073a48f038a305 (patch)
tree8c4e1cd449242c7689199c7997764f78b82565d2 /arch/arm64/mm/hugetlbpage.c
parentarm64: hugetlb: set_huge_pte_at Add WARN_ON on !pte_present (diff)
downloadlinux-dev-b5b0be86d7181ed82cee9d8ac5073a48f038a305.tar.xz
linux-dev-b5b0be86d7181ed82cee9d8ac5073a48f038a305.zip
arm64: hugetlb: Introduce pte_pgprot helper
Rather than xor pte bits in various places, use this helper function. Cc: David Woods <dwoods@mellanox.com> Signed-off-by: Steve Capper <steve.capper@arm.com> Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to '')
-rw-r--r--arch/arm64/mm/hugetlbpage.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index 7b61e4833432..cb84ca33bc6b 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -41,6 +41,16 @@ int pud_huge(pud_t pud)
#endif
}
+/*
+ * Select all bits except the pfn
+ */
+static inline pgprot_t pte_pgprot(pte_t pte)
+{
+ unsigned long pfn = pte_pfn(pte);
+
+ return __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^ pte_val(pte));
+}
+
static int find_num_contig(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, size_t *pgsize)
{
@@ -80,7 +90,7 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
ncontig = find_num_contig(mm, addr, ptep, &pgsize);
pfn = pte_pfn(pte);
- hugeprot = __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^ pte_val(pte));
+ hugeprot = pte_pgprot(pte);
for (i = 0; i < ncontig; i++) {
pr_debug("%s: set pte %p to 0x%llx\n", __func__, ptep,
pte_val(pfn_pte(pfn, hugeprot)));
@@ -223,9 +233,7 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
size_t pgsize = 0;
unsigned long pfn = pte_pfn(pte);
/* Select all bits except the pfn */
- pgprot_t hugeprot =
- __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^
- pte_val(pte));
+ pgprot_t hugeprot = pte_pgprot(pte);
pfn = pte_pfn(pte);
ncontig = find_num_contig(vma->vm_mm, addr, ptep,