From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 7 Mar 2016 23:24:25 +0000 (-0500)
Subject: PowerPC-64 ABIv1: add build error if KALLSYMS_ALL is missing
X-Git-Tag: v2.7.2~4
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=4edd719c79048fdc30c5fa9238225f390ff7ad5a;p=lttng-modules.git

PowerPC-64 ABIv1: add build error if KALLSYMS_ALL is missing

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/wrapper/kallsyms.h b/wrapper/kallsyms.h
index ad9e1f28..8200018a 100644
--- a/wrapper/kallsyms.h
+++ b/wrapper/kallsyms.h
@@ -28,6 +28,16 @@
 
 #include <linux/kallsyms.h>
 
+/*
+ * PowerPC ABIv1 needs KALLSYMS_ALL to get the function descriptor,
+ * which is needed to perform the function call.
+ */
+#if defined(CONFIG_PPC64) && (!defined(_CALL_ELF) || _CALL_ELF < 2)
+# ifndef CONFIG_KALLSYMS_ALL
+#  error "LTTng-modules requires CONFIG_KALLSYMS_ALL on PowerPC ABIv1"
+# endif
+#endif
+
 static inline
 unsigned long kallsyms_lookup_funcptr(const char *name)
 {