aboutsummaryrefslogtreecommitdiffstats
path: root/mm/mprotect.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/mprotect.c')
-rw-r--r--mm/mprotect.c25
1 files changed, 8 insertions, 17 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 7332c1785744..769a67a15803 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -58,36 +58,27 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
58 if (pte_numa(ptent)) 58 if (pte_numa(ptent))
59 ptent = pte_mknonnuma(ptent); 59 ptent = pte_mknonnuma(ptent);
60 ptent = pte_modify(ptent, newprot); 60 ptent = pte_modify(ptent, newprot);
61 /*
62 * Avoid taking write faults for pages we
63 * know to be dirty.
64 */
65 if (dirty_accountable && pte_dirty(ptent))
66 ptent = pte_mkwrite(ptent);
67 ptep_modify_prot_commit(mm, addr, pte, ptent);
61 updated = true; 68 updated = true;
62 } else { 69 } else {
63 struct page *page; 70 struct page *page;
64 71
65 ptent = *pte;
66 page = vm_normal_page(vma, addr, oldpte); 72 page = vm_normal_page(vma, addr, oldpte);
67 if (page && !PageKsm(page)) { 73 if (page && !PageKsm(page)) {
68 if (!pte_numa(oldpte)) { 74 if (!pte_numa(oldpte)) {
69 ptent = pte_mknuma(ptent); 75 ptep_set_numa(mm, addr, pte);
70 set_pte_at(mm, addr, pte, ptent);
71 updated = true; 76 updated = true;
72 } 77 }
73 } 78 }
74 } 79 }
75
76 /*
77 * Avoid taking write faults for pages we know to be
78 * dirty.
79 */
80 if (dirty_accountable && pte_dirty(ptent)) {
81 ptent = pte_mkwrite(ptent);
82 updated = true;
83 }
84
85 if (updated) 80 if (updated)
86 pages++; 81 pages++;
87
88 /* Only !prot_numa always clears the pte */
89 if (!prot_numa)
90 ptep_modify_prot_commit(mm, addr, pte, ptent);
91 } else if (IS_ENABLED(CONFIG_MIGRATION) && !pte_file(oldpte)) { 82 } else if (IS_ENABLED(CONFIG_MIGRATION) && !pte_file(oldpte)) {
92 swp_entry_t entry = pte_to_swp_entry(oldpte); 83 swp_entry_t entry = pte_to_swp_entry(oldpte);
93 84