NOMMU: Make VMAs per MM as for MMU-mode linux

[pandora-kernel.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 1f97d8a..7496231 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2090,6 +2090,9 @@ void exit_mmap(struct mm_struct *mm)
        arch_exit_mmap(mm);
        mmu_notifier_release(mm);
 
+       if (!mm->mmap)  /* Can happen if dup_mmap() received an OOM */
+               return;
+
        if (mm->locked_vm) {
                vma = mm->mmap;
                while (vma) {
@@ -2469,3 +2472,13 @@ void mm_drop_all_locks(struct mm_struct *mm)
 
        mutex_unlock(&mm_all_locks_mutex);
 }
+
+/*
+ * initialise the VMA slab
+ */
+void __init mmap_init(void)
+{
+       vm_area_cachep = kmem_cache_create("vm_area_struct",
+                       sizeof(struct vm_area_struct), 0,
+                       SLAB_PANIC, NULL);
+}