powerpc/ftrace: Fix #if that should be #ifdef

Commit bb7253403f7a4670a128e4c080fd8ea1bd4d5029 ("powerpc64,
ftrace: save toc only on modules for function graph"), added an
#if CONFIG_PPC64.  This changes it to #ifdef.

Fixes the following warning on 32-bit builds:
 arch/powerpc/kernel/ftrace.c:562:5: error: "CONFIG_PPC64" is not defined

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 5455943..c2b90a9 100644 (file)
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -564,7 +564,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
        if (unlikely(atomic_read(&current->tracing_graph_pause)))
                return;
 
-#if CONFIG_PPC64
+#ifdef CONFIG_PPC64
        /* non core kernel code needs to save and restore the TOC */
        if (REGION_ID(self_addr) != KERNEL_REGION_ID)
                return_hooker = (unsigned long)&mod_return_to_handler;