diff options
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2016-09-07 12:45:09 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-09-12 09:59:46 -0400 |
| commit | f971cc9aabc287120bbe7f3f1abe70c13e61ee94 (patch) | |
| tree | 9d1dc39fb8ddd1bf34fa06b960baa36b0b70a1f1 /kernel/trace | |
| parent | 7b2c86250122de316cbab8754050622ead04af39 (diff) | |
| download | linux-f971cc9aabc287120bbe7f3f1abe70c13e61ee94.tar.bz2 | |
tracing: Have max_latency be defined for HWLAT_TRACER as well
The hwlat tracer uses tr->max_latency, and if it's the only tracer enabled
that uses it, the build will fail. Add max_latency and its file when the
hwlat tracer is enabled.
Link: http://lkml.kernel.org/r/d6c3b7eb-ba95-1ffa-0453-464e1e24262a@infradead.org
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 6 | ||||
| -rw-r--r-- | kernel/trace/trace.h | 2 |
2 files changed, 5 insertions, 3 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 474cc814e16d..e0d0cfc1aa20 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4945,7 +4945,7 @@ out: return ret; } -#ifdef CONFIG_TRACER_MAX_TRACE +#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER) static ssize_t tracing_max_lat_read(struct file *filp, char __user *ubuf, @@ -5867,7 +5867,7 @@ static const struct file_operations tracing_thresh_fops = { .llseek = generic_file_llseek, }; -#ifdef CONFIG_TRACER_MAX_TRACE +#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER) static const struct file_operations tracing_max_lat_fops = { .open = tracing_open_generic, .read = tracing_max_lat_read, @@ -7195,7 +7195,7 @@ init_tracer_tracefs(struct trace_array *tr, struct dentry *d_tracer) create_trace_options_dir(tr); -#ifdef CONFIG_TRACER_MAX_TRACE +#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER) trace_create_file("tracing_max_latency", 0644, d_tracer, &tr->max_latency, &tracing_max_lat_fops); #endif diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 1d866b0c1567..fd24b1f9ac43 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -214,6 +214,8 @@ struct trace_array { */ struct trace_buffer max_buffer; bool allocated_snapshot; +#endif +#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER) unsigned long max_latency; #endif struct trace_pid_list __rcu *filtered_pids; |