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tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer

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Current tracing_init_dentry() return a d_entry pointer, while is not
necessary. This function returns NULL on success or error on failure,
which means there is no valid d_entry pointer return.

Let's return 0 on success and negative value for error.

Link: https://lkml.kernel.org/r/20200712011036.70948-5-richard.weiyang@linux.alibaba.com

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Wei Yang
2020-07-12 09:10:36 +08:00
committed by Steven Rostedt (VMware)
parent dc300d77b8
commit 22c36b1826
11 changed files with 57 additions and 61 deletions
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12
kernel/trace/trace_stack.c
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@@ -554,20 +554,20 @@ __setup("stacktrace", enable_stacktrace);
static __init int stack_trace_init(void)
{
struct dentry *d_tracer;
int ret;
d_tracer = tracing_init_dentry();
if (IS_ERR(d_tracer))
ret = tracing_init_dentry();
if (ret)
return 0;
trace_create_file("stack_max_size", 0644, d_tracer,
trace_create_file("stack_max_size", 0644, NULL,
&stack_trace_max_size, &stack_max_size_fops);
trace_create_file("stack_trace", 0444, d_tracer,
trace_create_file("stack_trace", 0444, NULL,
NULL, &stack_trace_fops);
#ifdef CONFIG_DYNAMIC_FTRACE
trace_create_file("stack_trace_filter", 0644, d_tracer,
trace_create_file("stack_trace_filter", 0644, NULL,
&trace_ops, &stack_trace_filter_fops);
#endif