1 files changed, 75 insertions, 1 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ecf91f8034bf..afa550f66537 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -14,7 +14,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
-
+#include <linux/seq_file.h>
 #include <linux/vmalloc.h>
 
 #include <asm/uaccess.h>
@@ -873,3 +873,77 @@ void free_vm_area(struct vm_struct *area)
         kfree(area);
 }
 EXPORT_SYMBOL_GPL(free_vm_area);
+
+
+#ifdef CONFIG_PROC_FS
+static void *s_start(struct seq_file *m, loff_t *pos)
+{
+        loff_t n = *pos;
+        struct vm_struct *v;
+
+        read_lock(&vmlist_lock);
+        v = vmlist;
+        while (n > 0 && v) {
+                n--;
+                v = v->next;
+        }
+        if (!n)
+                return v;
+
+        return NULL;
+
+}
+
+static void *s_next(struct seq_file *m, void *p, loff_t *pos)
+{
+        struct vm_struct *v = p;
+
+        ++*pos;
+        return v->next;
+}
+
+static void s_stop(struct seq_file *m, void *p)
+{
+        read_unlock(&vmlist_lock);
+}
+
+static int s_show(struct seq_file *m, void *p)
+{
+        struct vm_struct *v = p;
+
+        seq_printf(m, "0x%p-0x%p %7ld",
+                v->addr, v->addr + v->size, v->size);
+
+        if (v->nr_pages)
+                seq_printf(m, " pages=%d", v->nr_pages);
+
+        if (v->phys_addr)
+                seq_printf(m, " phys=%lx", v->phys_addr);
+
+        if (v->flags & VM_IOREMAP)
+                seq_printf(m, " ioremap");
+
+        if (v->flags & VM_ALLOC)
+                seq_printf(m, " vmalloc");
+
+        if (v->flags & VM_MAP)
+                seq_printf(m, " vmap");
+
+        if (v->flags & VM_USERMAP)
+                seq_printf(m, " user");
+
+        if (v->flags & VM_VPAGES)
+                seq_printf(m, " vpages");
+
+        seq_putc(m, '\n');
+        return 0;
+}
+
+const struct seq_operations vmalloc_op = {
+        .start = s_start,
+        .next = s_next,
+        .stop = s_stop,
+        .show = s_show,
+};
+#endif
+