remove ancient clang workaround from powerpc pthread_arch.h asm

versions of clang all the way back to 3.1 lack the bug this was
purportedly working around.

diff --git a/arch/powerpc/pthread_arch.h b/arch/powerpc/pthread_arch.h
index 79e5a09f925b75cc797cf8619077d310f7bd0c65..bab2e6ca459cc8530fa2da595a76a16f7deaafef 100644 (file)
--- a/arch/powerpc/pthread_arch.h
+++ b/arch/powerpc/pthread_arch.h
@@ -1,12 +1,7 @@
 static inline struct pthread *__pthread_self()
 {
-#ifdef __clang__
-       char *tp;
-       __asm__ __volatile__ ("mr %0, 2" : "=r"(tp) : : );
-#else
        register char *tp __asm__("r2");
        __asm__ __volatile__ ("" : "=r" (tp) );
-#endif
        return (pthread_t)(tp - 0x7000 - sizeof(struct pthread));
 }