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Date: Thu, 1 Nov 2012 01:56:35 +0900 From: Joonsoo Kim <js1304@...il.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, Joonsoo Kim <js1304@...il.com>, Mel Gorman <mel@....ul.ie>, Peter Zijlstra <a.p.zijlstra@...llo.nl> Subject: [PATCH v2 3/5] mm, highmem: remove page_address_pool list We can find free page_address_map instance without the page_address_pool. So remove it. Cc: Mel Gorman <mel@....ul.ie> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl> Signed-off-by: Joonsoo Kim <js1304@...il.com> Reviewed-by: Minchan Kim <minchan@...nel.org> diff --git a/mm/highmem.c b/mm/highmem.c index 017bad1..d98b0a9 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); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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