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tracing: Make syscall tracepoints conditional 

The syscall enter/exit tracepoints are only supported on archs that
HAVE_SYSCALL_TRACEPOINTS, so the declarations should be #ifdef'ed.
Also, the definition of syscall_regfunc and syscall_unregfunc should
depend on this same config, rather than the ftrace-specific one.

Signed-off-by: Josh Stone <jistone@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Martin Bligh <mbligh@google.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <1251150194-1713-3-git-send-email-jistone@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Josh Stone 2009-08-24 14:43:12 -07:00 committed by Frederic Weisbecker
parent 6670000119
commit 3d27d8cb34
2 changed files with 5 additions and 1 deletions
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4
include/trace/syscall.h
View File

@ -8,6 +8,8 @@
#include <asm/ptrace.h>
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
extern void syscall_regfunc(void);
extern void syscall_unregfunc(void);
@ -25,6 +27,8 @@ DECLARE_TRACE_WITH_CALLBACK(syscall_exit,
syscall_unregfunc
);
#endif
/*
* A syscall entry in the ftrace syscalls array.
*

2
kernel/tracepoint.c
View File

@ -576,7 +576,7 @@ __initcall(init_tracepoints);
#endif /* CONFIG_MODULES */
#ifdef CONFIG_FTRACE_SYSCALLS
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
static DEFINE_MUTEX(regfunc_mutex);
static int sys_tracepoint_refcount;