xen: simplify balloon_first_page() with list_first_entry_or_null() (9346c2a8) · Commits · 戴 / test

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 <jeff.liu@oracle.com> Signed-off-by:

Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by:

David Vrabel <david.vrabel@citrix.com>

drivers/xen/balloon.c

+1 −8

Original line number	Diff line number	Diff line
		@@ -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;

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