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mm, highmem: remove page_address_pool list

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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>
This commit is contained in:
Joonsoo Kim 2012-12-11 16:01:23 -08:00 committed by Linus Torvalds
parent cc33a303f1
commit a354e2c84e
1 changed files with 2 additions and 16 deletions
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18
mm/highmem.c
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@ -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 @@ void set_page_address(struct page *page, void *virtual)
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);