f11cf813de
In preparation for introducing seed devices the dax-bus core needs to be able to intercept ->probe() and ->remove() operations. Towards that end arrange for the bus and drivers to switch from raw 'struct device' driver operations to 'struct dev_dax' typed operations. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Jason Yan <yanaijie@huawei.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Brice Goglin <Brice.Goglin@inria.fr> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jia He <justin.he@arm.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: "Jérôme Glisse" <jglisse@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: kernel test robot <lkp@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/160106113357.30709.4541750544799737855.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
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#include <linux/percpu-refcount.h>
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#include <linux/memremap.h>
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#include <linux/module.h>
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#include <linux/pfn_t.h>
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#include <linux/nd.h>
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#include "../bus.h"
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/* we need the private definitions to implement compat suport */
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#include "../dax-private.h"
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static int dax_pmem_compat_probe(struct device *dev)
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{
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struct dev_dax *dev_dax = __dax_pmem_probe(dev, DEV_DAX_CLASS);
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int rc;
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if (IS_ERR(dev_dax))
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return PTR_ERR(dev_dax);
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if (!devres_open_group(&dev_dax->dev, dev_dax, GFP_KERNEL))
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return -ENOMEM;
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device_lock(&dev_dax->dev);
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rc = dev_dax_probe(dev_dax);
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device_unlock(&dev_dax->dev);
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devres_close_group(&dev_dax->dev, dev_dax);
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if (rc)
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devres_release_group(&dev_dax->dev, dev_dax);
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return rc;
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}
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static int dax_pmem_compat_release(struct device *dev, void *data)
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{
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device_lock(dev);
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devres_release_group(dev, to_dev_dax(dev));
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device_unlock(dev);
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return 0;
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}
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static int dax_pmem_compat_remove(struct device *dev)
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{
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device_for_each_child(dev, NULL, dax_pmem_compat_release);
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return 0;
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}
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static struct nd_device_driver dax_pmem_compat_driver = {
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.probe = dax_pmem_compat_probe,
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.remove = dax_pmem_compat_remove,
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.drv = {
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.name = "dax_pmem_compat",
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},
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.type = ND_DRIVER_DAX_PMEM,
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};
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static int __init dax_pmem_compat_init(void)
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{
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return nd_driver_register(&dax_pmem_compat_driver);
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}
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module_init(dax_pmem_compat_init);
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static void __exit dax_pmem_compat_exit(void)
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{
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driver_unregister(&dax_pmem_compat_driver.drv);
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}
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module_exit(dax_pmem_compat_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Intel Corporation");
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MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DAX_PMEM);
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