From a4574f63edc6f76fb46dcd65d3eb4d5a8e23ba38 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 13 Oct 2020 16:50:29 -0700 Subject: mm/memremap_pages: convert to 'struct range' MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Dan Carpenter Signed-off-by: Andrew Morton Reviewed-by: Boris Ostrovsky [xen] Cc: Paul Mackerras Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Vishal Verma Cc: Vivek Goyal Cc: Dave Jiang Cc: Ben Skeggs Cc: David Airlie Cc: Daniel Vetter Cc: Ira Weiny Cc: Bjorn Helgaas Cc: Juergen Gross Cc: Stefano Stabellini Cc: "Jérôme Glisse" Cc: Andy Lutomirski Cc: Ard Biesheuvel Cc: Ard Biesheuvel Cc: Borislav Petkov Cc: Brice Goglin Cc: Catalin Marinas Cc: Dave Hansen Cc: David Hildenbrand Cc: Greg Kroah-Hartman Cc: "H. Peter Anvin" Cc: Hulk Robot Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Jason Yan Cc: Jeff Moyer Cc: Jia He Cc: Joao Martins Cc: Jonathan Cameron Cc: kernel test robot Cc: Mike Rapoport Cc: Pavel Tatashin Cc: Peter Zijlstra Cc: "Rafael J. Wysocki" Cc: Randy Dunlap Cc: Thomas Gleixner Cc: Tom Lendacky Cc: Wei Yang Cc: Will Deacon 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 --- drivers/nvdimm/badrange.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) (limited to 'drivers/nvdimm/badrange.c') diff --git a/drivers/nvdimm/badrange.c b/drivers/nvdimm/badrange.c index b9eeefa27e3a..aaf6e215a8c6 100644 --- a/drivers/nvdimm/badrange.c +++ b/drivers/nvdimm/badrange.c @@ -211,7 +211,7 @@ static void __add_badblock_range(struct badblocks *bb, u64 ns_offset, u64 len) } static void badblocks_populate(struct badrange *badrange, - struct badblocks *bb, const struct resource *res) + struct badblocks *bb, const struct range *range) { struct badrange_entry *bre; @@ -222,34 +222,34 @@ static void badblocks_populate(struct badrange *badrange, u64 bre_end = bre->start + bre->length - 1; /* Discard intervals with no intersection */ - if (bre_end < res->start) + if (bre_end < range->start) continue; - if (bre->start > res->end) + if (bre->start > range->end) continue; /* Deal with any overlap after start of the namespace */ - if (bre->start >= res->start) { + if (bre->start >= range->start) { u64 start = bre->start; u64 len; - if (bre_end <= res->end) + if (bre_end <= range->end) len = bre->length; else - len = res->start + resource_size(res) + len = range->start + range_len(range) - bre->start; - __add_badblock_range(bb, start - res->start, len); + __add_badblock_range(bb, start - range->start, len); continue; } /* * Deal with overlap for badrange starting before * the namespace. */ - if (bre->start < res->start) { + if (bre->start < range->start) { u64 len; - if (bre_end < res->end) - len = bre->start + bre->length - res->start; + if (bre_end < range->end) + len = bre->start + bre->length - range->start; else - len = resource_size(res); + len = range_len(range); __add_badblock_range(bb, 0, len); } } @@ -267,7 +267,7 @@ static void badblocks_populate(struct badrange *badrange, * and add badblocks entries for all matching sub-ranges */ void nvdimm_badblocks_populate(struct nd_region *nd_region, - struct badblocks *bb, const struct resource *res) + struct badblocks *bb, const struct range *range) { struct nvdimm_bus *nvdimm_bus; @@ -279,7 +279,7 @@ void nvdimm_badblocks_populate(struct nd_region *nd_region, nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); nvdimm_bus_lock(&nvdimm_bus->dev); - badblocks_populate(&nvdimm_bus->badrange, bb, res); + badblocks_populate(&nvdimm_bus->badrange, bb, range); nvdimm_bus_unlock(&nvdimm_bus->dev); } EXPORT_SYMBOL_GPL(nvdimm_badblocks_populate); -- cgit v1.2.3