提交 b9f9108c 编写于 作者: S Steven Rostedt (Red Hat) 提交者: Steven Rostedt

tracing: Remove access to trace_flags in trace_printk.c

In the effort to move the global trace_flags to the tracing instances, the
direct access to trace_flags must be removed from trace_printk.c

Instead, add a new trace_printk_enabled boolean that is set by a new access
function trace_printk_control(), that will enable or disable trace_printk.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
上级 b5e87c05
......@@ -3555,8 +3555,10 @@ int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled)
#endif
}
if (mask == TRACE_ITER_PRINTK)
if (mask == TRACE_ITER_PRINTK) {
trace_printk_start_stop_comm(enabled);
trace_printk_control(enabled);
}
return 0;
}
......
......@@ -1318,6 +1318,7 @@ extern const char *__stop___trace_bprintk_fmt[];
extern const char *__start___tracepoint_str[];
extern const char *__stop___tracepoint_str[];
void trace_printk_control(bool enabled);
void trace_printk_init_buffers(void);
void trace_printk_start_comm(void);
int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set);
......
......@@ -178,6 +178,12 @@ static inline void format_mod_start(void) { }
static inline void format_mod_stop(void) { }
#endif /* CONFIG_MODULES */
static bool __read_mostly trace_printk_enabled = true;
void trace_printk_control(bool enabled)
{
trace_printk_enabled = enabled;
}
__initdata_or_module static
struct notifier_block module_trace_bprintk_format_nb = {
......@@ -192,7 +198,7 @@ int __trace_bprintk(unsigned long ip, const char *fmt, ...)
if (unlikely(!fmt))
return 0;
if (!(trace_flags & TRACE_ITER_PRINTK))
if (!trace_printk_enabled)
return 0;
va_start(ap, fmt);
......@@ -207,7 +213,7 @@ int __ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap)
if (unlikely(!fmt))
return 0;
if (!(trace_flags & TRACE_ITER_PRINTK))
if (!trace_printk_enabled)
return 0;
return trace_vbprintk(ip, fmt, ap);
......@@ -219,7 +225,7 @@ int __trace_printk(unsigned long ip, const char *fmt, ...)
int ret;
va_list ap;
if (!(trace_flags & TRACE_ITER_PRINTK))
if (!trace_printk_enabled)
return 0;
va_start(ap, fmt);
......@@ -231,7 +237,7 @@ EXPORT_SYMBOL_GPL(__trace_printk);
int __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap)
{
if (!(trace_flags & TRACE_ITER_PRINTK))
if (!trace_printk_enabled)
return 0;
return trace_vprintk(ip, fmt, ap);
......
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