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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-10-23 15:43:51 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-10-23 15:43:51 -0400 |
| commit | fa8a74de0622e97c7d0c9dff8bf6718548bd6e45 (patch) | |
| tree | 147754ba39434eb66eaa216bb2d7b59e33008011 /kernel | |
| parent | Merge tag 'vfio-v5.4-rc5' of git://github.com/awilliam/linux-vfio (diff) | |
| parent | tracing: Fix race in perf_trace_buf initialization (diff) | |
| download | linux-dev-fa8a74de0622e97c7d0c9dff8bf6718548bd6e45.tar.xz linux-dev-fa8a74de0622e97c7d0c9dff8bf6718548bd6e45.zip | |
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
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_event_perf.c | 4 | ||||
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 2 |
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; } |