From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 13 Aug 2009 21:37:26 +0000 (+0200)
Subject: tracing: Fix syscall tracing on !HAVE_FTRACE_SYSCALLS architectures
X-Git-Tag: firefly_0821_release~12934^2~83
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=60d970c254b95ec7a0fc4c590b510253987b64a0;p=firefly-linux-kernel-4.4.55.git

tracing: Fix syscall tracing on !HAVE_FTRACE_SYSCALLS architectures

The new syscall_regfunc()/unregfunc() functions rely on
the existence of TIF_SYSCALL_FTRACE - but that TIF flag
is only offered by HAVE_FTRACE_SYSCALLS.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 070a42bb8920..35dd27adb82c 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -579,6 +579,8 @@ __initcall(init_tracepoints);
 
 #endif /* CONFIG_MODULES */
 
+#ifdef CONFIG_FTRACE_SYSCALLS
+
 static DEFINE_MUTEX(regfunc_mutex);
 static int sys_tracepoint_refcount;
 
@@ -615,3 +617,4 @@ void syscall_unregfunc(void)
 	}
 	mutex_unlock(&regfunc_mutex);
 }
+#endif