gre: don't allow to add the same tunnel twice

[linux.git] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 6ac89e9f82efe0936df17931acc60503a9405c3b..64635f5278ff2d41525fe1ca3ebcf5314c95e3e4 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -827,7 +827,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
                count_vm_event(THP_FAULT_FALLBACK);
                return VM_FAULT_FALLBACK;
        }
-       if (unlikely(mem_cgroup_newpage_charge(page, mm, GFP_KERNEL))) {
+       if (unlikely(mem_cgroup_charge_anon(page, mm, GFP_KERNEL))) {
                put_page(page);
                count_vm_event(THP_FAULT_FALLBACK);
                return VM_FAULT_FALLBACK;
@@ -968,7 +968,7 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
                                               __GFP_OTHER_NODE,
                                               vma, address, page_to_nid(page));
                if (unlikely(!pages[i] ||
-                            mem_cgroup_newpage_charge(pages[i], mm,
+                            mem_cgroup_charge_anon(pages[i], mm,
                                                       GFP_KERNEL))) {
                        if (pages[i])
                                put_page(pages[i]);
@@ -1101,7 +1101,7 @@ alloc:
                goto out;
        }
 
-       if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
+       if (unlikely(mem_cgroup_charge_anon(new_page, mm, GFP_KERNEL))) {
                put_page(new_page);
                if (page) {
                        split_huge_page(page);
@@ -1891,17 +1891,22 @@ out:
 int hugepage_madvise(struct vm_area_struct *vma,
                     unsigned long *vm_flags, int advice)
 {
-       struct mm_struct *mm = vma->vm_mm;
-
        switch (advice) {
        case MADV_HUGEPAGE:
+#ifdef CONFIG_S390
+               /*
+                * qemu blindly sets MADV_HUGEPAGE on all allocations, but s390
+                * can't handle this properly after s390_enable_sie, so we simply
+                * ignore the madvise to prevent qemu from causing a SIGSEGV.
+                */
+               if (mm_has_pgste(vma->vm_mm))
+                       return 0;
+#endif
                /*
                 * Be somewhat over-protective like KSM for now!
                 */
                if (*vm_flags & (VM_HUGEPAGE | VM_NO_THP))
                        return -EINVAL;
-               if (mm->def_flags & VM_NOHUGEPAGE)
-                       return -EINVAL;
                *vm_flags &= ~VM_NOHUGEPAGE;
                *vm_flags |= VM_HUGEPAGE;
                /*
@@ -2354,7 +2359,7 @@ static void collapse_huge_page(struct mm_struct *mm,
        if (!new_page)
                return;
 
-       if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL)))
+       if (unlikely(mem_cgroup_charge_anon(new_page, mm, GFP_KERNEL)))
                return;
 
        /*