summaryrefslogtreecommitdiff
path: root/drivers/xen
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2020-10-13 16:50:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-13 18:38:28 -0700
commita4574f63edc6f76fb46dcd65d3eb4d5a8e23ba38 (patch)
treed7a5f8793d8d05eba104b32a290c29ba52869962 /drivers/xen
parentfcffb6a1df921c81579e9c01f9caa281c3f991d5 (diff)
mm/memremap_pages: convert to 'struct range'
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>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/unpopulated-alloc.c44
1 files changed, 30 insertions, 14 deletions
diff --git a/drivers/xen/unpopulated-alloc.c b/drivers/xen/unpopulated-alloc.c
index 3b98dc921426..091b8669eca3 100644
--- a/drivers/xen/unpopulated-alloc.c
+++ b/drivers/xen/unpopulated-alloc.c
@@ -18,27 +18,37 @@ static unsigned int list_count;
static int fill_list(unsigned int nr_pages)
{
struct dev_pagemap *pgmap;
+ struct resource *res;
void *vaddr;
unsigned int i, alloc_pages = round_up(nr_pages, PAGES_PER_SECTION);
- int ret;
+ int ret = -ENOMEM;
+
+ res = kzalloc(sizeof(*res), GFP_KERNEL);
+ if (!res)
+ return -ENOMEM;
pgmap = kzalloc(sizeof(*pgmap), GFP_KERNEL);
if (!pgmap)
- return -ENOMEM;
+ goto err_pgmap;
pgmap->type = MEMORY_DEVICE_GENERIC;
- pgmap->res.name = "Xen scratch";
- pgmap->res.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+ res->name = "Xen scratch";
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
- ret = allocate_resource(&iomem_resource, &pgmap->res,
+ ret = allocate_resource(&iomem_resource, res,
alloc_pages * PAGE_SIZE, 0, -1,
PAGES_PER_SECTION * PAGE_SIZE, NULL, NULL);
if (ret < 0) {
pr_err("Cannot allocate new IOMEM resource\n");
- kfree(pgmap);
- return ret;
+ goto err_resource;
}
+ pgmap->range = (struct range) {
+ .start = res->start,
+ .end = res->end,
+ };
+ pgmap->owner = res;
+
#ifdef CONFIG_XEN_HAVE_PVMMU
/*
* memremap will build page tables for the new memory so
@@ -50,14 +60,13 @@ static int fill_list(unsigned int nr_pages)
* conflict with any devices.
*/
if (!xen_feature(XENFEAT_auto_translated_physmap)) {
- xen_pfn_t pfn = PFN_DOWN(pgmap->res.start);
+ xen_pfn_t pfn = PFN_DOWN(res->start);
for (i = 0; i < alloc_pages; i++) {
if (!set_phys_to_machine(pfn + i, INVALID_P2M_ENTRY)) {
pr_warn("set_phys_to_machine() failed, no memory added\n");
- release_resource(&pgmap->res);
- kfree(pgmap);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto err_memremap;
}
}
}
@@ -66,9 +75,8 @@ static int fill_list(unsigned int nr_pages)
vaddr = memremap_pages(pgmap, NUMA_NO_NODE);
if (IS_ERR(vaddr)) {
pr_err("Cannot remap memory range\n");
- release_resource(&pgmap->res);
- kfree(pgmap);
- return PTR_ERR(vaddr);
+ ret = PTR_ERR(vaddr);
+ goto err_memremap;
}
for (i = 0; i < alloc_pages; i++) {
@@ -80,6 +88,14 @@ static int fill_list(unsigned int nr_pages)
}
return 0;
+
+err_memremap:
+ release_resource(res);
+err_resource:
+ kfree(pgmap);
+err_pgmap:
+ kfree(res);
+ return ret;
}
/**