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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2019-03-05 15:49:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 21:07:21 -0800 |
| commit | f4b7e272b5c0425915e2115068e0a5a20a3a628e (patch) | |
| tree | 7b5894a4cc657a7606aa183187392b7eae7e22bc /mm/page_idle.c | |
| parent | a7ca12f9d905e7437dd3beb9cbb8e85bc2b991f4 (diff) | |
| download | linux-f4b7e272b5c0425915e2115068e0a5a20a3a628e.tar.gz linux-f4b7e272b5c0425915e2115068e0a5a20a3a628e.tar.bz2 linux-f4b7e272b5c0425915e2115068e0a5a20a3a628e.zip | |
mm: remove zone_lru_lock() function, access ->lru_lock directly
We have common pattern to access lru_lock from a page pointer:
zone_lru_lock(page_zone(page))
Which is silly, because it unfolds to this:
&NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)]->zone_pgdat->lru_lock
while we can simply do
&NODE_DATA(page_to_nid(page))->lru_lock
Remove zone_lru_lock() function, since it's only complicate things. Use
'page_pgdat(page)->lru_lock' pattern instead.
[aryabinin@virtuozzo.com: a slightly better version of __split_huge_page()]
Link: http://lkml.kernel.org/r/20190301121651.7741-1-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/20190228083329.31892-2-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_idle.c')
| -rw-r--r-- | mm/page_idle.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/page_idle.c b/mm/page_idle.c index b9e4b42b33ab..0b39ec0c945c 100644 --- a/mm/page_idle.c +++ b/mm/page_idle.c @@ -31,7 +31,7 @@ static struct page *page_idle_get_page(unsigned long pfn) { struct page *page; - struct zone *zone; + pg_data_t *pgdat; if (!pfn_valid(pfn)) return NULL; @@ -41,13 +41,13 @@ static struct page *page_idle_get_page(unsigned long pfn) !get_page_unless_zero(page)) return NULL; - zone = page_zone(page); - spin_lock_irq(zone_lru_lock(zone)); + pgdat = page_pgdat(page); + spin_lock_irq(&pgdat->lru_lock); if (unlikely(!PageLRU(page))) { put_page(page); page = NULL; } - spin_unlock_irq(zone_lru_lock(zone)); + spin_unlock_irq(&pgdat->lru_lock); return page; } |