netns xfrm: fix "ip xfrm state|policy count" misreport

[safe/jmp/linux-2.6] / mm / util.c

diff --git a/mm/util.c b/mm/util.c
index d5d2213..834db7b 100644 (file)
--- a/mm/util.c
+++ b/mm/util.c
@@ -168,6 +168,10 @@ EXPORT_SYMBOL(krealloc);
  *
  * The memory of the object @p points to is zeroed before freed.
  * If @p is %NULL, kzfree() does nothing.
+ *
+ * Note: this function zeroes the whole allocated buffer which can be a good
+ * deal bigger than the requested buffer size passed to kmalloc(). So be
+ * careful when using this function in performance sensitive code.
  */
 void kzfree(const void *p)
 {
@@ -216,7 +220,7 @@ char *strndup_user(const char __user *s, long n)
 }
 EXPORT_SYMBOL(strndup_user);
 
-#ifndef HAVE_ARCH_PICK_MMAP_LAYOUT
+#if defined(CONFIG_MMU) && !defined(HAVE_ARCH_PICK_MMAP_LAYOUT)
 void arch_pick_mmap_layout(struct mm_struct *mm)
 {
        mm->mmap_base = TASK_UNMAPPED_BASE;