From: Sergey Fedorov <vital.had@gmail.com>
Date: Fri, 5 Jan 2024 10:44:18 +0000 (+0800)
Subject: ppc.h: use mftb on ppc
X-Git-Tag: v0.14.1~7
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=f6d614bcca247096df4cdfd586d551b26d0ea4ce;p=userspace-rcu.git

ppc.h: use mftb on ppc

Older versions of GNU as do not support mftbl. The issue affects Darwin
PowerPC, as well as some older versions of NetBSD and Linux. Since mftb
is equivalent and universally understood, just use that.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I098b70fa8bb077143d2d658835586b6b059b879f
---

diff --git a/include/urcu/arch/ppc.h b/include/urcu/arch/ppc.h
index 791529e..56fb82b 100644
--- a/include/urcu/arch/ppc.h
+++ b/include/urcu/arch/ppc.h
@@ -63,7 +63,7 @@ extern "C" {
 	__extension__					\
 	({ 						\
 		unsigned long rval;			\
-		__asm__ __volatile__ ("mftbl %0" : "=r" (rval));	\
+		__asm__ __volatile__ ("mftb %0" : "=r" (rval));	\
 		rval;					\
 	})