Up-level the local section size and mask from kernel/memremap.c to
global definitions. These will be used by the new sub-section hotplug
support.
Cc: Michal Hocko <mho...@suse.com>
Cc: Vlastimil Babka <vba...@suse.cz>
Cc: Johannes Weiner <han...@cmpxchg.org>
Cc: Logan Gunthorpe <log...@deltatee.com>
Cc: Mel Gorman <mgor...@techsingularity.net>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Stephen Bates <stephen.ba...@microsemi.com>
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
include/linux/mmzone.h | 2 ++
kernel/memremap.c | 10 ++++------
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 82a1af3afa04..a95b83ee65ec 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1050,6 +1050,8 @@ static inline unsigned long early_pfn_to_nid(unsigned
long pfn)
* PFN_SECTION_SHIFT pfn to/from section number
*/
#define PA_SECTION_SHIFT (SECTION_SIZE_BITS)
+#define PA_SECTION_SIZE (1UL << PA_SECTION_SHIFT)
+#define PA_SECTION_MASK (~(PA_SECTION_SIZE-1))
#define PFN_SECTION_SHIFT (SECTION_SIZE_BITS - PAGE_SHIFT)
#define NR_MEM_SECTIONS (1UL << SECTIONS_SHIFT)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 72e93754c0f4..c4f63346ff52 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -172,8 +172,6 @@ EXPORT_SYMBOL(devm_memunmap);
#ifdef CONFIG_ZONE_DEVICE
static DEFINE_MUTEX(pgmap_lock);
static RADIX_TREE(pgmap_radix, GFP_KERNEL);
-#define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1)
-#define SECTION_SIZE (1UL << PA_SECTION_SHIFT)
struct page_map {
struct resource res;
@@ -267,8 +265,8 @@ static void devm_memremap_pages_release(struct device *dev,
void *data)
}
/* pages are dead and unused, undo the arch mapping */
- align_start = res->start & ~(SECTION_SIZE - 1);
- align_size = ALIGN(resource_size(res), SECTION_SIZE);
+ align_start = res->start & PA_SECTION_MASK;
+ align_size = ALIGN(resource_size(res), PA_SECTION_SIZE);
mem_hotplug_begin();
arch_remove_memory(align_start, align_size);
@@ -316,8 +314,8 @@ void *devm_memremap_pages(struct device *dev, struct
resource *res,
struct page_map *page_map;
int error, nid, is_ram;
- align_start = res->start & ~(SECTION_SIZE - 1);
- align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE)
+ 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,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE);
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