irqsoff_tracer_call

Name:qsoff uses its own tracer function to keep the overhead down:

Proto:static void irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct pt_regs *pt_regs)

Type:void

Parameter:

Type	Parameter	Name
unsigned long	ip
unsigned long	parent_ip
struct ftrace_ops *	op
struct pt_regs *	pt_regs

143

tr = irqsoff_trace

147

If Not Prologue for the preempt and irqs off function tracers.* Returns 1 if it is OK to continue, and data->disabled is* incremented.* 0 if the trace is to be ignored, and data->disabled* is kept the same.* Note, this function is also used outside this ifdef but Then Return

150

trace_function(tr, ip, parent_ip, flags, We mask the PREEMPT_NEED_RESCHED bit so as not to confuse all current users* that think a non-zero value indicates we cannot preempt.)

152

atomic_dec( & disabled)

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