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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2013-03-09 00:40:58 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-03-15 00:35:56 -0400 |
| commit | ca268da6e415448a43138e1abc5d5f057af319d7 (patch) | |
| tree | 33fcaf68989e12fca96ad86bdece7eaac16d1545 /kernel/trace/trace.c | |
| parent | 9d3c752c062e3266f1051ba0825276ea1e2777da (diff) | |
| download | lwn-ca268da6e415448a43138e1abc5d5f057af319d7.tar.gz lwn-ca268da6e415448a43138e1abc5d5f057af319d7.zip | |
tracing: Add internal ftrace trace_puts() for ftrace to use
There's a few places that ftrace uses trace_printk() for internal
use, but this requires context (normal, softirq, irq, NMI) buffers
to keep things lockless. But the trace_puts() does not, as it can
write the string directly into the ring buffer. Make a internal helper
for trace_puts() and have the internal functions use that.
This way the extra context buffers are not used.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 5043a0c4dde0..d372c6504c99 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -443,16 +443,16 @@ void tracing_snapshot(void) unsigned long flags; if (!tr->allocated_snapshot) { - trace_printk("*** SNAPSHOT NOT ALLOCATED ***\n"); - trace_printk("*** stopping trace here! ***\n"); + internal_trace_puts("*** SNAPSHOT NOT ALLOCATED ***\n"); + internal_trace_puts("*** stopping trace here! ***\n"); tracing_off(); return; } /* Note, snapshot can not be used when the tracer uses it */ if (tracer->use_max_tr) { - trace_printk("*** LATENCY TRACER ACTIVE ***\n"); - trace_printk("*** Can not use snapshot (sorry) ***\n"); + internal_trace_puts("*** LATENCY TRACER ACTIVE ***\n"); + internal_trace_puts("*** Can not use snapshot (sorry) ***\n"); return; } |