kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/arch/powerpc/perf/core-fsl-emb.c
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@@ -1,13 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Performance event support - Freescale Embedded Performance Monitor
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  *
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  * Copyright 2008-2009 Paul Mackerras, IBM Corporation.
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  * Copyright 2010 Freescale Semiconductor, Inc.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  */
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 #include <linux/kernel.h>
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 #include <linux/sched.h>
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@@ -34,19 +30,6 @@
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 static atomic_t num_events;
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 /* Used to avoid races in calling reserve/release_pmc_hardware */
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 static DEFINE_MUTEX(pmc_reserve_mutex);
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-
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-/*
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- * If interrupts were soft-disabled when a PMU interrupt occurs, treat
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- * it as an NMI.
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- */
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-static inline int perf_intr_is_nmi(struct pt_regs *regs)
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-{
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-#ifdef __powerpc64__
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-	return (regs->softe & IRQS_DISABLED);
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-#else
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-	return 0;
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-#endif
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-}
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 static void perf_event_interrupt(struct pt_regs *regs);
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@@ -663,13 +646,6 @@
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 	struct perf_event *event;
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 	unsigned long val;
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 	int found = 0;
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-	int nmi;
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-
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-	nmi = perf_intr_is_nmi(regs);
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-	if (nmi)
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-		nmi_enter();
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-	else
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-		irq_enter();
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 	for (i = 0; i < ppmu->n_counter; ++i) {
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 		event = cpuhw->event[i];
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@@ -694,11 +670,6 @@
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 	mtmsr(mfmsr() | MSR_PMM);
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 	mtpmr(PMRN_PMGC0, PMGC0_PMIE | PMGC0_FCECE);
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 	isync();
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-
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-	if (nmi)
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-		nmi_exit();
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-	else
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-		irq_exit();
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 }
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 void hw_perf_event_setup(int cpu)