linux-kernel - [tip:tracing/core] tracing: Fix syscall tracing on !HAVE_FTRACE

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Date:	Thu, 13 Aug 2009 22:05:56 GMT
From:	tip-bot for Ingo Molnar <mingo@...e.hu>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	peterz@...radead.org, fweisbec@...il.com, rostedt@...dmis.org,
	tglx@...utronix.de, jbaron@...hat.com, mingo@...e.hu
Subject: [tip:tracing/core] tracing: Fix syscall tracing on !HAVE_FTRACE_SYSCALLS architectures

Commit-ID:  60d970c254b95ec7a0fc4c590b510253987b64a0
Gitweb:     http://git.kernel.org/tip/60d970c254b95ec7a0fc4c590b510253987b64a0
Author:     Ingo Molnar <mingo@...e.hu>
AuthorDate: Thu, 13 Aug 2009 23:37:26 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 13 Aug 2009 23:38:20 +0200

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@...il.com>
Cc: Jason Baron <jbaron@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Peter Zijlstra <peterz@...radead.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/tracepoint.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 070a42b..35dd27a 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
--
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