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mm, memory hotplug: small cleanup in online_pages() 

We can reuse the nid we've determined instead of repeated pfn_to_nid()
usages.  Also zone_to_nid() should be a bit cheaper in general than
pfn_to_nid().

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
steinar/wifi_calib_4_9_kernel
Vlastimil Babka 2016-03-17 14:18:12 -07:00 committed by Linus Torvalds
parent 698b1b3064
commit e888ca3545
1 changed files with 3 additions and 3 deletions
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6
mm/memory_hotplug.c
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@ -1055,7 +1055,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
arg.nr_pages = nr_pages;
node_states_check_changes_online(nr_pages, zone, &arg);
nid = pfn_to_nid(pfn);
nid = zone_to_nid(zone);
ret = memory_notify(MEM_GOING_ONLINE, &arg);
ret = notifier_to_errno(ret);
@ -1095,7 +1095,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
pgdat_resize_unlock(zone->zone_pgdat, &flags);
if (onlined_pages) {
node_states_set_node(zone_to_nid(zone), &arg);
node_states_set_node(nid, &arg);
if (need_zonelists_rebuild)
build_all_zonelists(NULL, NULL);
else
@ -1107,7 +1107,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
init_per_zone_wmark_min();
if (onlined_pages) {
kswapd_run(zone_to_nid(zone));
kswapd_run(nid);
kcompactd_run(nid);
}