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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>
This commit is contained in:
Kaitao Cheng 2020-05-29 22:12:14 +08:00 committed by Steven Rostedt (VMware)
parent 5414251aa2
commit 026bb845b0
1 changed files with 10 additions and 2 deletions
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12
kernel/trace/ftrace.c
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@ -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);