提交 4dce17b2 编写于 作者: S Steven Rostedt (VMware)

Merge commit '0f179765' into trace/ftrace/core

Need to get the changes from 0f179765 ("ftrace: Fix regression with
module command in stack_trace_filter") as it is required to fix some other
changes with stack_trace_filter and the new development code.
Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>
......@@ -4653,9 +4653,6 @@ static int ftrace_process_regex(struct ftrace_iterator *iter,
command = strsep(&next, ":");
if (WARN_ON_ONCE(!tr))
return -EINVAL;
mutex_lock(&ftrace_cmd_mutex);
list_for_each_entry(p, &ftrace_commands, list) {
if (strcmp(p->name, command) == 0) {
......
......@@ -6957,6 +6957,9 @@ ftrace_trace_snapshot_callback(struct trace_array *tr, struct ftrace_hash *hash,
char *number;
int ret;
if (!tr)
return -ENODEV;
/* hash funcs only work with set_ftrace_filter */
if (!enable)
return -EINVAL;
......
......@@ -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. */
......
......@@ -409,7 +409,9 @@ static const struct file_operations stack_trace_fops = {
static int
stack_trace_filter_open(struct inode *inode, struct file *file)
{
return ftrace_regex_open(&trace_ops, FTRACE_ITER_FILTER,
struct ftrace_ops *ops = inode->i_private;
return ftrace_regex_open(ops, FTRACE_ITER_FILTER,
inode, file);
}
......@@ -476,7 +478,7 @@ static __init int stack_trace_init(void)
NULL, &stack_trace_fops);
trace_create_file("stack_trace_filter", 0444, d_tracer,
NULL, &stack_trace_filter_fops);
&trace_ops, &stack_trace_filter_fops);
if (stack_trace_filter_buf[0])
ftrace_set_early_filter(&trace_ops, stack_trace_filter_buf, 1);
......
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