diff options
Diffstat (limited to 'kernel/trace/trace_functions_graph.c')
| -rw-r--r-- | kernel/trace/trace_functions_graph.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 2d25ad1526bb..8968bf720c12 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -6,7 +6,6 @@ * is Copyright (c) Steven Rostedt <srostedt@redhat.com> * */ -#include <linux/debugfs.h> #include <linux/uaccess.h> #include <linux/ftrace.h> #include <linux/slab.h> @@ -151,7 +150,7 @@ ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth, * The curr_ret_stack is initialized to -1 and get increased * in this function. So it can be less than -1 only if it was * filtered out via ftrace_graph_notrace_addr() which can be - * set from set_graph_notrace file in debugfs by user. + * set from set_graph_notrace file in tracefs by user. */ if (current->curr_ret_stack < -1) return -EBUSY; @@ -279,7 +278,7 @@ int __trace_graph_entry(struct trace_array *tr, unsigned long flags, int pc) { - struct ftrace_event_call *call = &event_funcgraph_entry; + struct trace_event_call *call = &event_funcgraph_entry; struct ring_buffer_event *event; struct ring_buffer *buffer = tr->trace_buffer.buffer; struct ftrace_graph_ent_entry *entry; @@ -394,7 +393,7 @@ void __trace_graph_return(struct trace_array *tr, unsigned long flags, int pc) { - struct ftrace_event_call *call = &event_funcgraph_exit; + struct trace_event_call *call = &event_funcgraph_exit; struct ring_buffer_event *event; struct ring_buffer *buffer = tr->trace_buffer.buffer; struct ftrace_graph_ret_entry *entry; @@ -1309,15 +1308,19 @@ void graph_trace_open(struct trace_iterator *iter) { /* pid and depth on the last trace processed */ struct fgraph_data *data; + gfp_t gfpflags; int cpu; iter->private = NULL; - data = kzalloc(sizeof(*data), GFP_KERNEL); + /* We can be called in atomic context via ftrace_dump() */ + gfpflags = (in_atomic() || irqs_disabled()) ? GFP_ATOMIC : GFP_KERNEL; + + data = kzalloc(sizeof(*data), gfpflags); if (!data) goto out_err; - data->cpu_data = alloc_percpu(struct fgraph_cpu_data); + data->cpu_data = alloc_percpu_gfp(struct fgraph_cpu_data, gfpflags); if (!data->cpu_data) goto out_err_free; @@ -1432,7 +1435,7 @@ static const struct file_operations graph_depth_fops = { .llseek = generic_file_llseek, }; -static __init int init_graph_debugfs(void) +static __init int init_graph_tracefs(void) { struct dentry *d_tracer; @@ -1445,18 +1448,18 @@ static __init int init_graph_debugfs(void) return 0; } -fs_initcall(init_graph_debugfs); +fs_initcall(init_graph_tracefs); static __init int init_graph_trace(void) { max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1); - if (!register_ftrace_event(&graph_trace_entry_event)) { + if (!register_trace_event(&graph_trace_entry_event)) { pr_warning("Warning: could not register graph trace events\n"); return 1; } - if (!register_ftrace_event(&graph_trace_ret_event)) { + if (!register_trace_event(&graph_trace_ret_event)) { pr_warning("Warning: could not register graph trace events\n"); return 1; } |