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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2015-09-30 09:42:05 -0400
committerSteven Rostedt <rostedt@goodmis.org>2015-09-30 15:22:55 -0400
commit983f938ae69585213bbb779d841b90e75f93f545 (patch)
treeb7d592e16b741e612031e91f032ed97b440fc107 /kernel/trace/trace_kdb.c
parent55577204154c7a95c6bce4cb185366d638b238b5 (diff)
downloadop-kernel-dev-983f938ae69585213bbb779d841b90e75f93f545.zip
op-kernel-dev-983f938ae69585213bbb779d841b90e75f93f545.tar.gz
tracing: Move trace_flags from global to a trace_array field
In preparation to make trace options per instance, the global trace_flags needs to be moved from being a global variable to a field within the trace instance trace_array structure. There's still more work to do, as there's some functions that use trace_flags without passing in a way to get to the current_trace array. For those, the global_trace is used directly (from trace.c). This includes setting and clearing the trace_flags. This means that when a new instance is created, it just gets the trace_flags of the global_trace and will not be able to modify them. Depending on the functions that have access to the trace_array, the flags of an instance may not affect parts of its trace, where the global_trace is used. These will be fixed in future changes. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_kdb.c')
-rw-r--r--kernel/trace/trace_kdb.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/trace/trace_kdb.c b/kernel/trace/trace_kdb.c
index 3ccf5c2..57149bc 100644
--- a/kernel/trace/trace_kdb.c
+++ b/kernel/trace/trace_kdb.c
@@ -21,20 +21,22 @@ static void ftrace_dump_buf(int skip_lines, long cpu_file)
/* use static because iter can be a bit big for the stack */
static struct trace_iterator iter;
static struct ring_buffer_iter *buffer_iter[CONFIG_NR_CPUS];
+ struct trace_array *tr;
unsigned int old_userobj;
int cnt = 0, cpu;
trace_init_global_iter(&iter);
iter.buffer_iter = buffer_iter;
+ tr = iter.tr;
for_each_tracing_cpu(cpu) {
atomic_inc(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
}
- old_userobj = trace_flags;
+ old_userobj = tr->trace_flags;
/* don't look at user memory in panic mode */
- trace_flags &= ~TRACE_ITER_SYM_USEROBJ;
+ tr->trace_flags &= ~TRACE_ITER_SYM_USEROBJ;
kdb_printf("Dumping ftrace buffer:\n");
@@ -82,7 +84,7 @@ static void ftrace_dump_buf(int skip_lines, long cpu_file)
kdb_printf("---------------------------------\n");
out:
- trace_flags = old_userobj;
+ tr->trace_flags = old_userobj;
for_each_tracing_cpu(cpu) {
atomic_dec(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
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