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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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319b11ef57
This fixes: [ 0.010000] cpu cpu0: Error -2 creating of_node link
... which you get for every CPU on all architectures that use
CONFIG_GENERIC_CPU_DEVICES.
In that case, driver_init() calls cpu_dev_init() before calling
of_core_init(). Then we get the callchain:
cpu_dev_init()
-> cpu_dev_register_generic()
-> register_cpu(cpu, i)
-> device_register(&cpu->dev)
-> device_add(dev)
-> device_add_class_symlinks(dev)
... in device_add_class_symlinks, we we dev->of_node, and call
sysfs_create_link(), which fails because we haven't called
of_core_init() to register the sysfs devicetree directory yet.
Signed-off-by: Wesley W. Terpstra <wesley@sifive.com>
[hch: updated the changelog based on review feedback]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
39 lines
768 B
C
39 lines
768 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2002-3 Patrick Mochel
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* Copyright (c) 2002-3 Open Source Development Labs
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*/
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/memory.h>
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#include <linux/of.h>
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#include "base.h"
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/**
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* driver_init - initialize driver model.
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*
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* Call the driver model init functions to initialize their
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* subsystems. Called early from init/main.c.
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*/
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void __init driver_init(void)
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{
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/* These are the core pieces */
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devtmpfs_init();
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devices_init();
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buses_init();
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classes_init();
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firmware_init();
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hypervisor_init();
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/* These are also core pieces, but must come after the
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* core core pieces.
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*/
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of_core_init();
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platform_bus_init();
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cpu_dev_init();
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memory_dev_init();
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container_dev_init();
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}
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