From: "zhangwei(Jovi)" <jovi.zhang...@huawei.com> By moving find_event_field() and trace_find_field() into trace_events.c, the ftrace_common_fields list and trace_get_fields() can become local to the trace_events.c file.
find_event_field() is renamed to trace_find_event_field() to conform to the tracing global function names. Link: http://lkml.kernel.org/r/513d8426.9070...@huawei.com Signed-off-by: zhangwei(Jovi) <jovi.zhang...@huawei.com> [ rostedt: Modified trace_find_field() to trace_find_event_field() ] Signed-off-by: Steven Rostedt <rost...@goodmis.org> --- kernel/trace/trace.h | 6 ++---- kernel/trace/trace_events.c | 31 +++++++++++++++++++++++++++++-- kernel/trace/trace_events_filter.c | 29 +---------------------------- 3 files changed, 32 insertions(+), 34 deletions(-) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 5cc5236..9e01458 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -995,8 +995,6 @@ struct filter_pred { unsigned short right; }; -extern struct list_head ftrace_common_fields; - extern enum regex_type filter_parse_regex(char *buff, int len, char **search, int *not); extern void print_event_filter(struct ftrace_event_call *call, @@ -1009,8 +1007,8 @@ extern void print_subsystem_event_filter(struct event_subsystem *system, struct trace_seq *s); extern int filter_assign_type(const char *type); -struct list_head * -trace_get_fields(struct ftrace_event_call *event_call); +struct ftrace_event_field * +trace_find_event_field(struct ftrace_event_call *call, char *name); static inline int filter_check_discard(struct ftrace_event_call *call, void *rec, diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index c636523..ba523d7 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -34,7 +34,7 @@ char event_storage[EVENT_STORAGE_SIZE]; EXPORT_SYMBOL_GPL(event_storage); LIST_HEAD(ftrace_events); -LIST_HEAD(ftrace_common_fields); +static LIST_HEAD(ftrace_common_fields); #define GFP_TRACE (GFP_KERNEL | __GFP_ZERO) @@ -54,7 +54,7 @@ static struct kmem_cache *file_cachep; #define while_for_each_event_file() \ } -struct list_head * +static struct list_head * trace_get_fields(struct ftrace_event_call *event_call) { if (!event_call->class->get_fields) @@ -62,6 +62,33 @@ trace_get_fields(struct ftrace_event_call *event_call) return event_call->class->get_fields(event_call); } +static struct ftrace_event_field * +__find_event_field(struct list_head *head, char *name) +{ + struct ftrace_event_field *field; + + list_for_each_entry(field, head, link) { + if (!strcmp(field->name, name)) + return field; + } + + return NULL; +} + +struct ftrace_event_field * +trace_find_event_field(struct ftrace_event_call *call, char *name) +{ + struct ftrace_event_field *field; + struct list_head *head; + + field = __find_event_field(&ftrace_common_fields, name); + if (field) + return field; + + head = trace_get_fields(call); + return __find_event_field(head, name); +} + static int __trace_define_field(struct list_head *head, const char *type, const char *name, int offset, int size, int is_signed, int filter_type) diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 2a22a17..a636117 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -658,33 +658,6 @@ void print_subsystem_event_filter(struct event_subsystem *system, mutex_unlock(&event_mutex); } -static struct ftrace_event_field * -__find_event_field(struct list_head *head, char *name) -{ - struct ftrace_event_field *field; - - list_for_each_entry(field, head, link) { - if (!strcmp(field->name, name)) - return field; - } - - return NULL; -} - -static struct ftrace_event_field * -find_event_field(struct ftrace_event_call *call, char *name) -{ - struct ftrace_event_field *field; - struct list_head *head; - - field = __find_event_field(&ftrace_common_fields, name); - if (field) - return field; - - head = trace_get_fields(call); - return __find_event_field(head, name); -} - static int __alloc_pred_stack(struct pred_stack *stack, int n_preds) { stack->preds = kcalloc(n_preds + 1, sizeof(*stack->preds), GFP_KERNEL); @@ -1337,7 +1310,7 @@ static struct filter_pred *create_pred(struct filter_parse_state *ps, return NULL; } - field = find_event_field(call, operand1); + field = trace_find_event_field(call, operand1); if (!field) { parse_error(ps, FILT_ERR_FIELD_NOT_FOUND, 0); return NULL; -- 1.7.10.4
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