tracing: Remove syscall_exit_fields (7f85803a) · Commits · 戴 / test

There is no need for syscall_exit_fields as the syscall exit event class can already host the fields in its structure, like most other trace events do by default. Use that default behavior instead. Following this scheme, we don't need anymore to override the get_fields() callback of the syscall exit event class either. Hence both syscall_exit_fields and syscall_get_exit_fields() can be removed. Also changed some indentation to keep the following under 80 characters: ".fields = LIST_HEAD_INIT(event_class_syscall_exit.fields)," Acked-by:

Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by:

Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <4D301C0E.8090408@cn.fujitsu.com> Signed-off-by:

Steven Rostedt <rostedt@goodmis.org>

kernel/trace/trace_syscalls.c

+12 −21

Original line number	Diff line number	Diff line
		@@ -23,9 +23,6 @@ static int syscall_exit_register(struct ftrace_event_call *event,
		static int syscall_enter_define_fields(struct ftrace_event_call *call);
		static int syscall_exit_define_fields(struct ftrace_event_call *call);

		/* All syscall exit events have the same fields */
		static LIST_HEAD(syscall_exit_fields);

		static struct list_head *
		syscall_get_enter_fields(struct ftrace_event_call *call)
		{
		@@ -34,12 +31,6 @@ syscall_get_enter_fields(struct ftrace_event_call *call)
		return &entry->enter_fields;
		}

		static struct list_head *
		syscall_get_exit_fields(struct ftrace_event_call *call)
		{
		return &syscall_exit_fields;
		}

		struct trace_event_functions enter_syscall_print_funcs = {
		.trace = print_syscall_enter,
		};
		@@ -60,7 +51,7 @@ struct ftrace_event_class event_class_syscall_exit = {
		.system = "syscalls",
		.reg = syscall_exit_register,
		.define_fields = syscall_exit_define_fields,
		.get_fields = syscall_get_exit_fields,
		.fields = LIST_HEAD_INIT(event_class_syscall_exit.fields),
		.raw_init = init_syscall_trace,
		};

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