[tip:tracing/core] tracing: Fix syscall tracing on !HAVE_FTRACE_SYSCALLS architectures

tip-bot for Ingo Molnar
2009-08-13T22:06:31Z

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

---
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