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| author | Joonsoo Kim <js1304@gmail.com> | 2012-12-11 16:01:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-11 17:22:24 -0800 |
| commit | a354e2c84eeebcd7d7bbdd71216895b8e9866b5c (patch) | |
| tree | 78decaf4fd709e64ca4f521abec6838a6f20263b /mm/highmem.c | |
| parent | cc33a303f1c155cf0147964586bb80fa732d8a21 (diff) | |
| download | lwn-a354e2c84eeebcd7d7bbdd71216895b8e9866b5c.tar.gz lwn-a354e2c84eeebcd7d7bbdd71216895b8e9866b5c.zip | |
mm, highmem: remove page_address_pool list
We can find free page_address_map instance without the page_address_pool.
So remove it.
Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/highmem.c')
| -rw-r--r-- | mm/highmem.c | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/mm/highmem.c b/mm/highmem.c index f0f0f1d5e691..4d6f96c20191 100644 --- a/mm/highmem.c +++ b/mm/highmem.c @@ -324,10 +324,7 @@ struct page_address_map { struct list_head list; }; -/* - * page_address_map freelist, allocated from page_address_maps. - */ -static struct list_head page_address_pool; /* freelist */ +static struct page_address_map page_address_maps[LAST_PKMAP]; /* * Hash table bucket @@ -392,12 +389,7 @@ void set_page_address(struct page *page, void *virtual) pas = page_slot(page); if (virtual) { /* Add */ - BUG_ON(list_empty(&page_address_pool)); - - pam = list_entry(page_address_pool.next, - struct page_address_map, list); - list_del(&pam->list); - + pam = &page_address_maps[PKMAP_NR((unsigned long)virtual)]; pam->page = page; pam->virtual = virtual; @@ -410,7 +402,6 @@ void set_page_address(struct page *page, void *virtual) if (pam->page == page) { list_del(&pam->list); spin_unlock_irqrestore(&pas->lock, flags); - list_add_tail(&pam->list, &page_address_pool); goto done; } } @@ -420,15 +411,10 @@ done: return; } -static struct page_address_map page_address_maps[LAST_PKMAP]; - void __init page_address_init(void) { int i; - INIT_LIST_HEAD(&page_address_pool); - for (i = 0; i < ARRAY_SIZE(page_address_maps); i++) - list_add(&page_address_maps[i].list, &page_address_pool); for (i = 0; i < ARRAY_SIZE(page_address_htable); i++) { INIT_LIST_HEAD(&page_address_htable[i].lh); spin_lock_init(&page_address_htable[i].lock); |