diff options
Diffstat (limited to 'kernel/trace/trace_events.c')
| -rw-r--r-- | kernel/trace/trace_events.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 404a372ad85a..7ca09cdc20c2 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -30,6 +30,7 @@ DEFINE_MUTEX(event_mutex); LIST_HEAD(ftrace_events); +static LIST_HEAD(ftrace_generic_fields); static LIST_HEAD(ftrace_common_fields); #define GFP_TRACE (GFP_KERNEL | __GFP_ZERO) @@ -94,6 +95,10 @@ trace_find_event_field(struct trace_event_call *call, char *name) struct ftrace_event_field *field; struct list_head *head; + field = __find_event_field(&ftrace_generic_fields, name); + if (field) + return field; + field = __find_event_field(&ftrace_common_fields, name); if (field) return field; @@ -144,6 +149,13 @@ int trace_define_field(struct trace_event_call *call, const char *type, } EXPORT_SYMBOL_GPL(trace_define_field); +#define __generic_field(type, item, filter_type) \ + ret = __trace_define_field(&ftrace_generic_fields, #type, \ + #item, 0, 0, is_signed_type(type), \ + filter_type); \ + if (ret) \ + return ret; + #define __common_field(type, item) \ ret = __trace_define_field(&ftrace_common_fields, #type, \ "common_" #item, \ @@ -153,6 +165,16 @@ EXPORT_SYMBOL_GPL(trace_define_field); if (ret) \ return ret; +static int trace_define_generic_fields(void) +{ + int ret; + + __generic_field(int, cpu, FILTER_OTHER); + __generic_field(char *, comm, FILTER_PTR_STRING); + + return ret; +} + static int trace_define_common_fields(void) { int ret; @@ -2671,6 +2693,9 @@ static __init int event_trace_init(void) if (!entry) pr_warn("Could not create tracefs 'available_events' entry\n"); + if (trace_define_generic_fields()) + pr_warn("tracing: Failed to allocated generic fields"); + if (trace_define_common_fields()) pr_warn("tracing: Failed to allocate common fields"); |