hi all:
I found there seems no declaring about "struct ftrace_entry".
below the greping result of my kernel source code:

# grep -rwn 'struct ftrace_entry' *
kernel/trace/trace.h:214:               IF_ASSIGN(var, ent, struct 
ftrace_entry, TRACE_FN);     \
kernel/trace/trace_events.c:1483:       struct ftrace_entry *entry;
kernel/trace/trace_output.c:818:        struct ftrace_entry *field;
kernel/trace/trace_output.c:845:        struct ftrace_entry *field;
kernel/trace/trace_output.c:859:        struct ftrace_entry *field;
kernel/trace/trace_output.c:872:        struct ftrace_entry *field;
kernel/trace/trace.c:1098:      struct ftrace_entry *entry;
#


usually we use a struct we will declare its elements such as:

struct usb_host_endpoint {
        struct usb_endpoint_descriptor  desc;
        struct list_head                urb_list;
        void                            *hcpriv;
......................
};

I guess the secret should be "if_assign", but how does compiler interpret it?

-- 
Regards,
miloody

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