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2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/include/trace/events/cpuhp.h
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@@ -30,7 +30,7 @@
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 		__entry->fun	= fun;
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 	),
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-	TP_printk("cpu: %04u target: %3d step: %3d (%pf)",
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+	TP_printk("cpu: %04u target: %3d step: %3d (%ps)",
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 		  __entry->cpu, __entry->target, __entry->idx, __entry->fun)
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 );
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@@ -58,7 +58,7 @@
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 		__entry->fun	= fun;
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 	),
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-	TP_printk("cpu: %04u target: %3d step: %3d (%pf)",
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+	TP_printk("cpu: %04u target: %3d step: %3d (%ps)",
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 		  __entry->cpu, __entry->target, __entry->idx, __entry->fun)
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 );
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@@ -89,6 +89,28 @@
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 		  __entry->cpu, __entry->state, __entry->idx,  __entry->ret)
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 );
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+TRACE_EVENT(cpuhp_pause,
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+	TP_PROTO(struct cpumask *cpus, u64 start_time, unsigned char pause),
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+
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+	TP_ARGS(cpus, start_time, pause),
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+
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+	TP_STRUCT__entry(
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+		__field( unsigned int,	cpus		)
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+		__field( unsigned int,	active_cpus	)
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+		__field( unsigned int,	time		)
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+		__field( unsigned char,	pause		)
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+	),
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+
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+	TP_fast_assign(
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+		__entry->cpus	     = cpumask_bits(cpus)[0];
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+		__entry->active_cpus = cpumask_bits(cpu_active_mask)[0];
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+		__entry->time        = div64_u64(sched_clock() - start_time, 1000);
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+		__entry->pause	     = pause;
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+	),
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+
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+	TP_printk("req_cpus=0x%x act_cpus=0x%x time=%u us paused=%d",
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+		  __entry->cpus, __entry->active_cpus, __entry->time, __entry->pause)
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+);
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 #endif
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 /* This part must be outside protection */