diff options
| author | Kaitao Cheng <pilgrimtao@gmail.com> | 2020-05-29 22:12:14 +0800 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-06-17 17:13:18 -0400 |
| commit | 026bb845b0fff6dec91fe24511dad7d3067dc3ed (patch) | |
| tree | 43edf21313668841232adafa1e905cebc049b060 /kernel | |
| parent | 5414251aa2e23ad50cc769656b05ea196090e792 (diff) | |
| download | lwn-026bb845b0fff6dec91fe24511dad7d3067dc3ed.tar.gz lwn-026bb845b0fff6dec91fe24511dad7d3067dc3ed.zip | |
ftrace: Fix maybe-uninitialized compiler warning
During build compiler reports some 'false positive' warnings about
variables {'seq_ops', 'filtered_pids', 'other_pids'} may be used
uninitialized. This patch silences these warnings.
Also delete some useless spaces
Link: https://lkml.kernel.org/r/20200529141214.37648-1-pilgrimtao@gmail.com
Signed-off-by: Kaitao Cheng <pilgrimtao@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/ftrace.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index c163c3531faf..1903b80db6eb 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2260,7 +2260,7 @@ ftrace_find_tramp_ops_next(struct dyn_ftrace *rec, if (hash_contains_ip(ip, op->func_hash)) return op; - } + } return NULL; } @@ -3599,7 +3599,7 @@ static int t_show(struct seq_file *m, void *v) if (direct) seq_printf(m, "\n\tdirect-->%pS", (void *)direct); } - } + } seq_putc(m, '\n'); @@ -7151,6 +7151,10 @@ static int pid_open(struct inode *inode, struct file *file, int type) case TRACE_NO_PIDS: seq_ops = &ftrace_no_pid_sops; break; + default: + trace_array_put(tr); + WARN_ON_ONCE(1); + return -EINVAL; } ret = seq_open(file, seq_ops); @@ -7229,6 +7233,10 @@ pid_write(struct file *filp, const char __user *ubuf, other_pids = rcu_dereference_protected(tr->function_pids, lockdep_is_held(&ftrace_lock)); break; + default: + ret = -EINVAL; + WARN_ON_ONCE(1); + goto out; } ret = trace_pid_write(filtered_pids, &pid_list, ubuf, cnt); |