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hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/parisc/kernel/smp.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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 ** SMP Support
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 **
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@@ -11,10 +12,6 @@
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 ** Thanks to John Curry and Ullas Ponnadi. I learned a lot from their work.
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 ** -grant (1/12/2001)
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 **
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-**	This program is free software; you can redistribute it and/or modify
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-**	it under the terms of the GNU General Public License as published by
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-**      the Free Software Foundation; either version 2 of the License, or
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-**      (at your option) any later version.
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 */
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 #include <linux/types.h>
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 #include <linux/spinlock.h>
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@@ -43,8 +40,6 @@
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 #include <asm/irq.h>		/* for CPU_IRQ_REGION and friends */
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 #include <asm/mmu_context.h>
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 #include <asm/page.h>
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-#include <asm/pgtable.h>
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-#include <asm/pgalloc.h>
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 #include <asm/processor.h>
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 #include <asm/ptrace.h>
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 #include <asm/unistd.h>
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@@ -116,6 +111,7 @@
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 	/* REVISIT : does PM *know* this CPU isn't available? */
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 	set_cpu_online(smp_processor_id(), false);
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 	local_irq_disable();
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+	__pdc_cpu_rendezvous();
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 	for (;;)
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 		;
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 }
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@@ -159,6 +155,7 @@
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 			case IPI_CALL_FUNC:
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 				smp_debug(100, KERN_DEBUG "CPU%d IPI_CALL_FUNC\n", this_cpu);
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+				inc_irq_stat(irq_call_count);
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 				generic_smp_call_function_interrupt();
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 				break;
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@@ -185,9 +182,12 @@
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 					this_cpu, which);
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 				return IRQ_NONE;
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 			} /* Switch */
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-		/* let in any pending interrupts */
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-		local_irq_enable();
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-		local_irq_disable();
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+
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+			/* before doing more, let in any pending interrupts */
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+			if (ops) {
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+				local_irq_enable();
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+				local_irq_disable();
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+			}
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 		} /* while (ops) */
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 	}
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 	return IRQ_HANDLED;
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@@ -317,7 +317,6 @@
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 #endif
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 	smp_cpu_init(slave_id);
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-	preempt_disable();
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 	flush_cache_all_local(); /* start with known state */
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 	flush_tlb_all_local(NULL);