From: Dan Williams <dan.j.williams@intel.com>
To: akpm@linux-foundation.org
Cc: Stephen Bates <stephen.bates@microsemi.com>,
linux-mm@kvack.org, Logan Gunthorpe <logang@deltatee.com>,
linux-kernel@vger.kernel.org, toshi.kani@hpe.com
Subject: [PATCH v2 10/11] mm: enable section-unaligned devm_memremap_pages()
Date: Thu, 08 Dec 2016 18:41:47 -0800 [thread overview]
Message-ID: <148125130754.13512.16184028876011482135.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <148125125407.13512.1253904589564772668.stgit@dwillia2-desk3.amr.corp.intel.com>
Teach devm_memremap_pages() about the new sub-section capabilities of
arch_{add,remove}_memory().
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Stephen Bates <stephen.bates@microsemi.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
kernel/memremap.c | 22 +++++++---------------
1 file changed, 7 insertions(+), 15 deletions(-)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index bb063a26b67a..6e1595fc3c56 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -254,7 +254,6 @@ static void devm_memremap_pages_release(struct device *dev, void *data)
{
struct page_map *page_map = data;
struct resource *res = &page_map->res;
- resource_size_t align_start, align_size;
struct dev_pagemap *pgmap = &page_map->pgmap;
if (percpu_ref_tryget_live(pgmap->ref)) {
@@ -263,10 +262,8 @@ static void devm_memremap_pages_release(struct device *dev, void *data)
}
/* pages are dead and unused, undo the arch mapping */
- align_start = res->start & PA_SECTION_MASK;
- align_size = ALIGN(resource_size(res), PA_SECTION_SIZE);
- arch_remove_memory(align_start, align_size);
- untrack_pfn(NULL, PHYS_PFN(align_start), align_size);
+ arch_remove_memory(res->start, resource_size(res));
+ untrack_pfn(NULL, PHYS_PFN(res->start), resource_size(res));
pgmap_radix_release(res);
dev_WARN_ONCE(dev, pgmap->altmap && pgmap->altmap->alloc,
"%s: failed to free all reserved pages\n", __func__);
@@ -301,17 +298,13 @@ struct dev_pagemap *find_dev_pagemap(resource_size_t phys)
void *devm_memremap_pages(struct device *dev, struct resource *res,
struct percpu_ref *ref, struct vmem_altmap *altmap)
{
- resource_size_t align_start, align_size, align_end;
unsigned long pfn, pgoff, order;
pgprot_t pgprot = PAGE_KERNEL;
struct dev_pagemap *pgmap;
struct page_map *page_map;
int error, nid, is_ram;
- align_start = res->start & PA_SECTION_MASK;
- align_size = ALIGN(res->start + resource_size(res), PA_SECTION_SIZE)
- - align_start;
- is_ram = region_intersects(align_start, align_size,
+ is_ram = region_intersects(res->start, resource_size(res),
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE);
if (is_ram == REGION_MIXED) {
@@ -344,7 +337,6 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
mutex_lock(&pgmap_lock);
error = 0;
- align_end = align_start + align_size - 1;
/* we're storing full physical addresses in the radix */
BUILD_BUG_ON(sizeof(unsigned long) < sizeof(resource_size_t));
@@ -376,12 +368,12 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
if (nid < 0)
nid = numa_mem_id();
- error = track_pfn_remap(NULL, &pgprot, PHYS_PFN(align_start), 0,
- align_size);
+ error = track_pfn_remap(NULL, &pgprot, PHYS_PFN(res->start), 0,
+ resource_size(res));
if (error)
goto err_pfn_remap;
- error = arch_add_memory(nid, align_start, align_size, true);
+ error = arch_add_memory(nid, res->start, resource_size(res), true);
if (error)
goto err_add_memory;
@@ -401,7 +393,7 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
return __va(res->start);
err_add_memory:
- untrack_pfn(NULL, PHYS_PFN(align_start), align_size);
+ untrack_pfn(NULL, PHYS_PFN(res->start), resource_size(res));
err_pfn_remap:
err_radix:
pgmap_radix_release(res);
next prev parent reply other threads:[~2016-12-09 2:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-09 2:40 [PATCH v2 00/11] mm: sub-section memory hotplug support Dan Williams
2016-12-09 2:40 ` [PATCH v2 01/11] mm, devm_memremap_pages: use multi-order radix for ZONE_DEVICE lookups Dan Williams
2016-12-09 2:41 ` [PATCH v2 02/11] mm: introduce struct mem_section_usage to track partial population of a section Dan Williams
2016-12-09 2:41 ` [PATCH v2 03/11] mm: introduce common definitions for the size and mask " Dan Williams
2016-12-09 2:41 ` [PATCH v2 04/11] mm: cleanup sparse_init_one_section() return value Dan Williams
2016-12-09 2:41 ` [PATCH v2 05/11] mm: track active portions of a section at boot Dan Williams
2016-12-09 2:41 ` [PATCH v2 06/11] mm: fix register_new_memory() zone type detection Dan Williams
2016-12-09 2:41 ` [PATCH v2 07/11] mm: convert kmalloc_section_memmap() to populate_section_memmap() Dan Williams
2016-12-09 2:41 ` [PATCH v2 08/11] mm: prepare for hot-{add, remove} of sub-section ranges Dan Williams
2016-12-09 2:41 ` [PATCH v2 09/11] mm: support section-unaligned ZONE_DEVICE memory ranges Dan Williams
2016-12-09 2:41 ` Dan Williams [this message]
2016-12-09 2:41 ` [PATCH v2 11/11] libnvdimm, pfn, dax: stop padding pmem namespaces to section alignment Dan Williams
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