From: Josh Stone <jistone@redhat.com>
Date: Wed, 3 Oct 2012 19:59:15 +0000 (-0700)
Subject: stapdyn: nullify the pagefault machinations for derefs
X-Git-Tag: release-2.0~35
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=4fe296d99991320c7f6da2fd516e78dbe19f4cb6;p=systemtap.git

stapdyn: nullify the pagefault machinations for derefs

We don't need to care about pagefault safety in userspace, but the
definitions making those into preempt_disable led to recursing on
stapdyn_big_dumb_lock (going away in PR14571).  We can just #define
the pagefault_enable/disable away for the dyninst runtime.
---

diff --git a/runtime/dyninst/runtime_defines.h b/runtime/dyninst/runtime_defines.h
index 7087819f3..2ac5c19be 100644
--- a/runtime/dyninst/runtime_defines.h
+++ b/runtime/dyninst/runtime_defines.h
@@ -1 +1,6 @@
 #define STP_NO_OVERLOAD 1
+
+/* We don't need to worry about pagefaults in loc2c-runtime.h */
+#define STAPCONF_PAGEFAULT_DISABLE  1
+#define pagefault_disable()
+#define pagefault_enable()