From a4b51633cfdecf597c247afe028c08b520816590 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 2 Dec 2013 02:45:10 -0500
Subject: workaround clang deficiency affecting thread pointer access on
 powerpc

based on patch by Richard Pennington, who initially reported the
issue.
---
 arch/powerpc/pthread_arch.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/pthread_arch.h')

diff --git a/arch/powerpc/pthread_arch.h b/arch/powerpc/pthread_arch.h
index cb2a70b8..2d1ee43c 100644
--- a/arch/powerpc/pthread_arch.h
+++ b/arch/powerpc/pthread_arch.h
@@ -1,6 +1,11 @@
 static inline struct pthread *__pthread_self()
 {
-	register char* tp __asm__("r2");
+#ifdef __clang__
+	char *tp;
+	__asm__ __volatile__ ("mr %0, 2" : "=r"(tp) : : );
+#else
+	register char *tp __asm__("r2");
+#endif
 	return (pthread_t)(tp - 0x7000 - sizeof(struct pthread));
 }
                         
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