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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a4574f63ed
The 'struct resource' in 'struct dev_pagemap' is only used for holding resource span information. The other fields, 'name', 'flags', 'desc', 'parent', 'sibling', and 'child' are all unused wasted space. This is in preparation for introducing a multi-range extension of devm_memremap_pages(). The bulk of this change is unwinding all the places internal to libnvdimm that used 'struct resource' unnecessarily, and replacing instances of 'struct dev_pagemap'.res with 'struct dev_pagemap'.range. P2PDMA had a minor usage of the resource flags field, but only to report failures with "%pR". That is replaced with an open coded print of the range. [dan.carpenter@oracle.com: mm/hmm/test: use after free in dmirror_allocate_chunk()] Link: https://lkml.kernel.org/r/20200926121402.GA7467@kadam Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> [xen] Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Juergen Gross <jgross@suse.com> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: "Jérôme Glisse" <jglisse@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brice Goglin <Brice.Goglin@inria.fr> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Hulk Robot <hulkci@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Jason Yan <yanaijie@huawei.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Jia He <justin.he@arm.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: kernel test robot <lkp@intel.com> Cc: Mike Rapoport <rppt@linux.ibm.com> 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: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/159643103173.4062302.768998885691711532.stgit@dwillia2-desk3.amr.corp.intel.com Link: https://lkml.kernel.org/r/160106115761.30709.13539840236873663620.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
68 lines
1.9 KiB
C
68 lines
1.9 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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#ifndef __DAX_BUS_H__
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#define __DAX_BUS_H__
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#include <linux/device.h>
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#include <linux/range.h>
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struct dev_dax;
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struct resource;
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struct dax_device;
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struct dax_region;
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void dax_region_put(struct dax_region *dax_region);
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#define IORESOURCE_DAX_STATIC (1UL << 0)
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struct dax_region *alloc_dax_region(struct device *parent, int region_id,
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struct range *range, int target_node, unsigned int align,
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unsigned long flags);
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enum dev_dax_subsys {
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DEV_DAX_BUS = 0, /* zeroed dev_dax_data picks this by default */
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DEV_DAX_CLASS,
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};
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struct dev_dax_data {
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struct dax_region *dax_region;
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struct dev_pagemap *pgmap;
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enum dev_dax_subsys subsys;
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resource_size_t size;
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int id;
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};
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struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);
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/* to be deleted when DEV_DAX_CLASS is removed */
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struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys);
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struct dax_device_driver {
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struct device_driver drv;
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struct list_head ids;
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int match_always;
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int (*probe)(struct dev_dax *dev);
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int (*remove)(struct dev_dax *dev);
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};
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int __dax_driver_register(struct dax_device_driver *dax_drv,
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struct module *module, const char *mod_name);
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#define dax_driver_register(driver) \
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__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
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void dax_driver_unregister(struct dax_device_driver *dax_drv);
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void kill_dev_dax(struct dev_dax *dev_dax);
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#if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
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int dev_dax_probe(struct dev_dax *dev_dax);
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#endif
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/*
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* While run_dax() is potentially a generic operation that could be
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* defined in include/linux/dax.h we don't want to grow any users
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* outside of drivers/dax/
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*/
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void run_dax(struct dax_device *dax_dev);
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#define MODULE_ALIAS_DAX_DEVICE(type) \
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MODULE_ALIAS("dax:t" __stringify(type) "*")
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#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"
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#endif /* __DAX_BUS_H__ */
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