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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-07-20 15:27:04 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-02 15:41:31 +0200 |
| commit | 4f84f4330a11b9eb828bf5af557f4c79c64614a3 (patch) | |
| tree | 2ff001464083190f67f61fe3766ee2a6eeb8c349 /kernel/lockdep.c | |
| parent | bbfa26229a8143889e95e0df4a9d69067ee836cd (diff) | |
| download | linux-4f84f4330a11b9eb828bf5af557f4c79c64614a3.tar.gz linux-4f84f4330a11b9eb828bf5af557f4c79c64614a3.tar.bz2 linux-4f84f4330a11b9eb828bf5af557f4c79c64614a3.zip | |
lockdep: Fix backtraces
Truncate stupid -1 entries in backtraces.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1248096665.15751.8816.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/lockdep.c')
| -rw-r--r-- | kernel/lockdep.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 1cedb00e3e7a..2f0970297e30 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -367,11 +367,21 @@ static int save_trace(struct stack_trace *trace) save_stack_trace(trace); + /* + * Some daft arches put -1 at the end to indicate its a full trace. + * + * <rant> this is buggy anyway, since it takes a whole extra entry so a + * complete trace that maxes out the entries provided will be reported + * as incomplete, friggin useless </rant> + */ + if (trace->entries[trace->nr_entries-1] == ULONG_MAX) + trace->nr_entries--; + trace->max_entries = trace->nr_entries; nr_stack_trace_entries += trace->nr_entries; - if (nr_stack_trace_entries == MAX_STACK_TRACE_ENTRIES) { + if (nr_stack_trace_entries >= MAX_STACK_TRACE_ENTRIES-1) { if (!debug_locks_off_graph_unlock()) return 0; |