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| author |   Sean Paul <seanpaul@chromium.org> | 2017-08-14 13:14:36 -0400 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2017-08-14 13:14:36 -0400 |
| commit | 1724c7c0c9494dcbdd7f630f29e1e8427cb231d1 (patch) | |
| tree | d7c7ad032289cdf0633feee4bd6ec5800b666ca7 /kernel/trace/trace_functions.c | |
| parent | drm/atomic: Handle -EDEADLK with out-fences correctly (diff) | |
| parent | Linux 4.13-rc5 (diff) | |
| download | wireguard-linux-1724c7c0c9494dcbdd7f630f29e1e8427cb231d1.tar.xz wireguard-linux-1724c7c0c9494dcbdd7f630f29e1e8427cb231d1.zip | |
Merge origin/master into drm-misc-fixes
Backmerge 4.13-rc5 into drm-misc-fixes, it was getting a
little stale.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'kernel/trace/trace_functions.c')
| -rw-r--r-- | kernel/trace/trace_functions.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c index a3bddbfd0874..a0910c0cdf2e 100644 --- a/kernel/trace/trace_functions.c +++ b/kernel/trace/trace_functions.c @@ -654,6 +654,9 @@ ftrace_trace_onoff_callback(struct trace_array *tr, struct ftrace_hash *hash, { struct ftrace_probe_ops *ops; + if (!tr) + return -ENODEV; + /* we register both traceon and traceoff to this callback */ if (strcmp(cmd, "traceon") == 0) ops = param ? &traceon_count_probe_ops : &traceon_probe_ops; @@ -670,6 +673,9 @@ ftrace_stacktrace_callback(struct trace_array *tr, struct ftrace_hash *hash, { struct ftrace_probe_ops *ops; + if (!tr) + return -ENODEV; + ops = param ? &stacktrace_count_probe_ops : &stacktrace_probe_ops; return ftrace_trace_probe_callback(tr, ops, hash, glob, cmd, @@ -682,6 +688,9 @@ ftrace_dump_callback(struct trace_array *tr, struct ftrace_hash *hash, { struct ftrace_probe_ops *ops; + if (!tr) + return -ENODEV; + ops = &dump_probe_ops; /* Only dump once. */ @@ -695,6 +704,9 @@ ftrace_cpudump_callback(struct trace_array *tr, struct ftrace_hash *hash, { struct ftrace_probe_ops *ops; + if (!tr) + return -ENODEV; + ops = &cpudump_probe_ops; /* Only dump once. */ |