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bcachefs: Use trylock in bch2_prt_backtrace()

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Easy workaround for a lockdep splat - and since bch2_prt_backtrace() is
only used in debug code this is fine.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-01-25 10:18:32 -05:00
parent 01ad673727
commit 3e57db65cd
1 changed files with 2 additions and 4 deletions
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6
fs/bcachefs/util.c
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@ -270,11 +270,9 @@ int bch2_prt_backtrace(struct printbuf *out, struct task_struct *task)
{
unsigned long entries[32];
unsigned i, nr_entries;
int ret;
ret = down_read_killable(&task->signal->exec_update_lock);
if (ret)
return ret;
if (!down_read_trylock(&task->signal->exec_update_lock))
return 0;
nr_entries = stack_trace_save_tsk(task, entries, ARRAY_SIZE(entries), 0);
for (i = 0; i < nr_entries; i++) {