AuxXxilium/linux_dsm_epyc7002
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Two minor fixes:

Browse Source 
- A race in perf trace initialization (missing mutexes)
 
  - Minor fix to represent gfp_t in synthetic events as properly signed
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Merge tag 'trace-v5.4-rc3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Two minor fixes:

   - A race in perf trace initialization (missing mutexes)

   - Minor fix to represent gfp_t in synthetic events as properly
     signed"

* tag 'trace-v5.4-rc3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix race in perf_trace_buf initialization
  tracing: Fix "gfp_t" format for synthetic events
This commit is contained in:
Linus Torvalds 2019-10-23 15:43:51 -04:00
commit fa8a74de06
2 changed files with 6 additions and 0 deletions
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4
kernel/trace/trace_event_perf.c
View File

@ -272,9 +272,11 @@ int perf_kprobe_init(struct perf_event *p_event, bool is_retprobe)
goto out;
}
mutex_lock(&event_mutex);
ret = perf_trace_event_init(tp_event, p_event);
if (ret)
destroy_local_trace_kprobe(tp_event);
mutex_unlock(&event_mutex);
out:
kfree(func);
return ret;
@ -282,8 +284,10 @@ int perf_kprobe_init(struct perf_event *p_event, bool is_retprobe)
void perf_kprobe_destroy(struct perf_event *p_event)
{
mutex_lock(&event_mutex);
perf_trace_event_close(p_event);
perf_trace_event_unreg(p_event);
mutex_unlock(&event_mutex);
destroy_local_trace_kprobe(p_event->tp_event);
}

2
kernel/trace/trace_events_hist.c
View File

@ -679,6 +679,8 @@ static bool synth_field_signed(char *type)
{
if (str_has_prefix(type, "u"))
return false;
if (strcmp(type, "gfp_t") == 0)
return false;
return true;
}