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authorLinus Torvalds <torvalds@linux-foundation.org>2019-10-23 15:43:51 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2019-10-23 15:43:51 -0400
commitfa8a74de0622e97c7d0c9dff8bf6718548bd6e45 (patch)
tree147754ba39434eb66eaa216bb2d7b59e33008011
parent64131618e8c8a1d5c1470d4d788214f6d4b43cde (diff)
parent6b1340cc00edeadd52ebd8a45171f38c8de2a387 (diff)
download96b-common-fa8a74de0622e97c7d0c9dff8bf6718548bd6e45.tar.gz
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
-rw-r--r--kernel/trace/trace_event_perf.c4
-rw-r--r--kernel/trace/trace_events_hist.c2
2 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index 0892e38ed6fb..a9dfa04ffa44 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -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 @@ out:
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);
}
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 57648c5aa679..7482a1466ebf 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -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;
}