From: Jie Liu Date: Wed, 13 Nov 2013 12:59:58 +0000 (+0800) Subject: xen: simplify balloon_first_page() with list_first_entry_or_null() X-Git-Tag: firefly_0821_release~176^2~4328^2~59 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9346c2a8defab777d1fba6bcc284f6ada181fe96;p=firefly-linux-kernel-4.4.55.git xen: simplify balloon_first_page() with list_first_entry_or_null() Replace the code logic at balloon_first_page() by calling list_first_entry_or_null() directly. since here is only one user of that routine, therefore we can just remove it. Signed-off-by: Jie Liu Signed-off-by: Konrad Rzeszutek Wilk Reviewed-by: David Vrabel --- diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 4c02e2b94103..37d06ea624aa 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -157,13 +157,6 @@ static struct page *balloon_retrieve(bool prefer_highmem) return page; } -static struct page *balloon_first_page(void) -{ - if (list_empty(&ballooned_pages)) - return NULL; - return list_entry(ballooned_pages.next, struct page, lru); -} - static struct page *balloon_next_page(struct page *page) { struct list_head *next = page->lru.next; @@ -328,7 +321,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages) if (nr_pages > ARRAY_SIZE(frame_list)) nr_pages = ARRAY_SIZE(frame_list); - page = balloon_first_page(); + page = list_first_entry_or_null(&ballooned_pages, struct page, lru); for (i = 0; i < nr_pages; i++) { if (!page) { nr_pages = i;