disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/arch/powerpc/platforms/cell/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 for BPA machines.
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  *
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@@ -5,11 +6,6 @@
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  * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
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  *
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  * Plus various changes from other IBM teams...
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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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 #undef DEBUG
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@@ -25,12 +21,12 @@
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 #include <linux/err.h>
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 #include <linux/device.h>
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 #include <linux/cpu.h>
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+#include <linux/pgtable.h>
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 #include <asm/ptrace.h>
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 #include <linux/atomic.h>
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 #include <asm/irq.h>
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 #include <asm/page.h>
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-#include <asm/pgtable.h>
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 #include <asm/io.h>
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 #include <asm/prom.h>
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 #include <asm/smp.h>
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@@ -81,9 +77,6 @@
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 		return 1;
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 	pcpu = get_hard_smp_processor_id(lcpu);
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-
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-	/* Fixup atomic count: it exited inside IRQ handler. */
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-	task_thread_info(paca_ptrs[lcpu]->__current)->preempt_count	= 0;
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 	/*
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 	 * If the RTAS start-cpu token does not exist then presume the