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-Url: http://git.liburcu.org/?p=urcu.git;a=commitdiff_plain;h=c6fbc27960c6ae09af830e33884a40f53a879f6b

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 80462c6..be9d158 100644
--- a/include/urcu/arch/ppc.h
+++ b/include/urcu/arch/ppc.h
@@ -51,7 +51,7 @@ extern "C" {
 	__extension__					\
 	({ 						\
 		unsigned long rval;			\
-		__asm__ __volatile__ ("mftbl %0" : "=r" (rval));	\
+		__asm__ __volatile__ ("mftb %0" : "=r" (rval));	\
 		rval;					\
 	})