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x86, hw-branch-tracer: allocate selftest iterator on heap

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Allocate the trace_iterator for the hw-branch-tracer selftest on the heap.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144556.578777000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Markus Metzger 2009-04-03 16:43:41 +02:00 committed by Ingo Molnar
parent de79f54f53
commit 4d657e51df
1 changed files with 12 additions and 8 deletions
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20
kernel/trace/trace_selftest.c
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@ -757,7 +757,7 @@ int
trace_selftest_startup_hw_branches(struct tracer *trace,
struct trace_array *tr)
{
struct trace_iterator iter;
struct trace_iterator *iter;
struct tracer tracer;
unsigned long count;
int ret;
@ -777,17 +777,21 @@ trace_selftest_startup_hw_branches(struct tracer *trace,
* The hw-branch tracer needs to collect the trace from the various
* cpu trace buffers - before tracing is stopped.
*/
memset(&iter, 0, sizeof(iter));
iter = kzalloc(sizeof(*iter), GFP_KERNEL);
if (!iter)
return -ENOMEM;
memcpy(&tracer, trace, sizeof(tracer));
iter.trace = &tracer;
iter.tr = tr;
iter.pos = -1;
mutex_init(&iter.mutex);
iter->trace = &tracer;
iter->tr = tr;
iter->pos = -1;
mutex_init(&iter->mutex);
trace->open(&iter);
trace->open(iter);
mutex_destroy(&iter.mutex);
mutex_destroy(&iter->mutex);
kfree(iter);
tracing_stop();