1 files changed, 31 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 673ebbf499c7..d902d0e25edc 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2754,3 +2754,34 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
 
         return buf - old_buf;
 }
+
+/*
+ * Print the name of a VMA.
+ */
+void print_vma_addr(char *prefix, unsigned long ip)
+{
+        struct mm_struct *mm = current->mm;
+        struct vm_area_struct *vma;
+
+        down_read(&mm->mmap_sem);
+        vma = find_vma(mm, ip);
+        if (vma && vma->vm_file) {
+                struct file *f = vma->vm_file;
+                char *buf = (char *)__get_free_page(GFP_KERNEL);
+                if (buf) {
+                        char *p, *s;
+
+                        p = d_path(f->f_dentry, f->f_vfsmnt, buf, PAGE_SIZE);
+                        if (IS_ERR(p))
+                                p = "?";
+                        s = strrchr(p, '/');
+                        if (s)
+                                p = s+1;
+                        printk("%s%s[%lx+%lx]", prefix, p,
+                                        vma->vm_start,
+                                        vma->vm_end - vma->vm_start);
+                        free_page((unsigned long)buf);
+                }
+        }
+        up_read(&current->mm->mmap_sem);
+}