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init: Have initcall_debug still work without CONFIG_TRACEPOINTS 

Add macros around the initcall_debug tracepoint code to have the code to
default back to the old method if CONFIG_TRACEPOINTS is not enabled.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2018-04-06 09:24:25 -04:00
parent 4e37958d12
commit b0dc52f15e
1 changed files with 26 additions and 2 deletions
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28
init/main.c
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@ -496,7 +496,14 @@ void __init __weak mem_encrypt_init(void) { }
bool initcall_debug;
core_param(initcall_debug, initcall_debug, bool, 0644);
#ifdef TRACEPOINTS_ENABLED
static void __init initcall_debug_enable(void);
#else
static inline void initcall_debug_enable(void)
{
}
#endif
/*
* Set up kernel memory allocators
@ -832,6 +839,7 @@ trace_initcall_finish_cb(void *data, initcall_t fn, int ret)
static ktime_t initcall_calltime;
#ifdef TRACEPOINTS_ENABLED
static void __init initcall_debug_enable(void)
{
int ret;
@ -842,6 +850,22 @@ static void __init initcall_debug_enable(void)
&initcall_calltime);
WARN(ret, "Failed to register initcall tracepoints\n");
}
# define do_trace_initcall_start trace_initcall_start
# define do_trace_initcall_finish trace_initcall_finish
#else
static inline void do_trace_initcall_start(initcall_t fn)
{
if (!initcall_debug)
return;
trace_initcall_start_cb(&initcall_calltime, fn);
}
static inline void do_trace_initcall_finish(initcall_t fn, int ret)
{
if (!initcall_debug)
return;
trace_initcall_finish_cb(&initcall_calltime, fn, ret);
}
#endif /* !TRACEPOINTS_ENABLED */
int __init_or_module do_one_initcall(initcall_t fn)
{
@ -852,9 +876,9 @@ int __init_or_module do_one_initcall(initcall_t fn)
if (initcall_blacklisted(fn))
return -EPERM;
trace_initcall_start(fn);
do_trace_initcall_start(fn);
ret = fn();
trace_initcall_finish(fn, ret);
do_trace_initcall_finish(fn, ret);
msgbuf[0] = 0;