diff options
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 1af4f8f2ab5d..2e767972e99c 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -63,6 +63,10 @@ static bool __read_mostly tracing_selftest_running; */ bool __read_mostly tracing_selftest_disabled; +/* Pipe tracepoints to printk */ +struct trace_iterator *tracepoint_print_iter; +int tracepoint_printk; + /* For tracers that don't implement custom flags */ static struct tracer_opt dummy_tracer_opt[] = { { } @@ -193,6 +197,13 @@ static int __init set_trace_boot_clock(char *str) } __setup("trace_clock=", set_trace_boot_clock); +static int __init set_tracepoint_printk(char *str) +{ + if ((strcmp(str, "=0") != 0 && strcmp(str, "=off") != 0)) + tracepoint_printk = 1; + return 1; +} +__setup("tp_printk", set_tracepoint_printk); unsigned long long ns2usecs(cycle_t nsec) { @@ -2031,7 +2042,7 @@ void trace_printk_init_buffers(void) pr_warning("** trace_printk() being used. Allocating extra memory. **\n"); pr_warning("** **\n"); pr_warning("** This means that this is a DEBUG kernel and it is **\n"); - pr_warning("** unsafe for produciton use. **\n"); + pr_warning("** unsafe for production use. **\n"); pr_warning("** **\n"); pr_warning("** If you see this message and you are not debugging **\n"); pr_warning("** the kernel, report this immediately to your vendor! **\n"); @@ -6898,6 +6909,19 @@ out: return ret; } +void __init trace_init(void) +{ + if (tracepoint_printk) { + tracepoint_print_iter = + kmalloc(sizeof(*tracepoint_print_iter), GFP_KERNEL); + if (WARN_ON(!tracepoint_print_iter)) + tracepoint_printk = 0; + } + tracer_alloc_buffers(); + init_ftrace_syscalls(); + trace_event_init(); +} + __init static int clear_boot_tracer(void) { /* @@ -6917,6 +6941,5 @@ __init static int clear_boot_tracer(void) return 0; } -early_initcall(tracer_alloc_buffers); fs_initcall(tracer_init_debugfs); late_initcall(clear_boot_tracer); |