uprobes: Fold uprobe_reset_state() into uprobe_dup_mmap()
Now that we have uprobe_dup_mmap() we can fold uprobe_reset_state()
into the new hook and remove it. mmput()->uprobe_clear_state() can't
be called before dup_mmap().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 33870b1..610e1c8 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1148,16 +1148,10 @@
kfree(area);
}
-/*
- * uprobe_reset_state - Free the area allocated for slots.
- */
-void uprobe_reset_state(struct mm_struct *mm)
-{
- mm->uprobes_state.xol_area = NULL;
-}
-
void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
{
+ newmm->uprobes_state.xol_area = NULL;
+
if (test_bit(MMF_HAS_UPROBES, &oldmm->flags))
set_bit(MMF_HAS_UPROBES, &newmm->flags);
}
diff --git a/kernel/fork.c b/kernel/fork.c
index cbb5f9f..2343c9e 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -837,8 +837,6 @@
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
mm->pmd_huge_pte = NULL;
#endif
- uprobe_reset_state(mm);
-
if (!mm_init(mm, tsk))
goto fail_nomem;