| commit | 3189cdb31622f4e40688ce5a6fc5d940b42bc805 | [log] [tgz] |
|---|---|---|
| author | Steven Rostedt <srostedt@redhat.com> | Fri Apr 17 16:13:55 2009 -0400 |
| committer | Steven Rostedt <rostedt@goodmis.org> | Fri Apr 17 16:21:35 2009 -0400 |
| tree | 89f370c0079281c55f37230c17951514c1b508c9 | |
| parent | 261842b7c9099f56de2eb969c8ad65402d68e00e [diff] |
tracing: protect trace_printk from recursion trace_printk can be called from any context, including NMIs. If this happens, then we must test for for recursion before grabbing any spinlocks. This patch prevents trace_printk from being called recursively. [ Impact: prevent hard lockup in lockdep event tracer ] Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>