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mm: use pgdat_end_pfn() to simplify the code in others

Use "pgdat_end_pfn()" instead of "pgdat->node_start_pfn +
pgdat->node_spanned_pages".  Simplify the code, no functional change.

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
master
Xishi Qiu 8 years ago
committed by Linus Torvalds
parent
commit
83285c72e0
  1. 3
      fs/proc/kcore.c
  2. 2
      mm/bootmem.c
  3. 9
      mm/memory_hotplug.c

3
fs/proc/kcore.c

@ -255,8 +255,7 @@ static int kcore_update_ram(void)
end_pfn = 0;
for_each_node_state(nid, N_MEMORY) {
unsigned long node_end;
node_end = NODE_DATA(nid)->node_start_pfn +
NODE_DATA(nid)->node_spanned_pages;
node_end = node_end_pfn(nid);
if (end_pfn < node_end)
end_pfn = node_end;
}

2
mm/bootmem.c

@ -784,7 +784,7 @@ void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
/* update goal according ...MAX_DMA32_PFN */
end_pfn = pgdat->node_start_pfn + pgdat->node_spanned_pages;
end_pfn = pgdat_end_pfn(pgdat);
if (end_pfn > MAX_DMA32_PFN + (128 >> (20 - PAGE_SHIFT)) &&
(goal >> PAGE_SHIFT) < MAX_DMA32_PFN) {

9
mm/memory_hotplug.c

@ -365,8 +365,7 @@ out_fail:
static void grow_pgdat_span(struct pglist_data *pgdat, unsigned long start_pfn,
unsigned long end_pfn)
{
unsigned long old_pgdat_end_pfn =
pgdat->node_start_pfn + pgdat->node_spanned_pages;
unsigned long old_pgdat_end_pfn = pgdat_end_pfn(pgdat);
if (!pgdat->node_spanned_pages || start_pfn < pgdat->node_start_pfn)
pgdat->node_start_pfn = start_pfn;
@ -579,9 +578,9 @@ static void shrink_zone_span(struct zone *zone, unsigned long start_pfn,
static void shrink_pgdat_span(struct pglist_data *pgdat,
unsigned long start_pfn, unsigned long end_pfn)
{
unsigned long pgdat_start_pfn = pgdat->node_start_pfn;
unsigned long pgdat_end_pfn =
pgdat->node_start_pfn + pgdat->node_spanned_pages;
unsigned long pgdat_start_pfn = pgdat->node_start_pfn;
unsigned long p = pgdat_end_pfn(pgdat); /* pgdat_end_pfn namespace clash */
unsigned long pgdat_end_pfn = p;
unsigned long pfn;
struct mem_section *ms;
int nid = pgdat->node_id;

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