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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-05-30 16:49:46 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-05-30 19:03:40 +0200 |
| commit | 4c27e756bc019ec1c11232893af036fdae720a97 (patch) | |
| tree | 799c598208d828e343422d73cb70b74e22f64608 /kernel/trace/trace_stack.c | |
| parent | tracing: Try again for saved cmdline if failed due to locking (diff) | |
| download | linux-4c27e756bc019ec1c11232893af036fdae720a97.tar.xz linux-4c27e756bc019ec1c11232893af036fdae720a97.zip | |
tracing: Move locking of trace_cmdline_lock into start/stop seq calls
With the conversion of the saved_cmdlines output to use seq_read, there
is now a race between accessing the values of the saved_cmdlines and
the writing to them. The trace_cmdline_lock needs to be taken at
the start and stop of the seq calls.
A new __trace_find_cmdline() call is created to allow for the look up
to happen without taking the lock.
Fixes: 42584c81c5ad tracing: Have saved_cmdlines use the seq_read infrastructure
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_stack.c')
0 files changed, 0 insertions, 0 deletions