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mm/page_alloc: remove unnecessary next_page in break_down_buddy_pages
The next_page is only used to forward page in case target is in second half range. Move forward page directly to remove unnecessary next_page. Link: https://lkml.kernel.org/r/20230927103514.98281-3-shikemeng@huaweicloud.com Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com> Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Oscar Salvador <osalvador@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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1 changed files with 2 additions and 4 deletions
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@ -6462,20 +6462,18 @@ static void break_down_buddy_pages(struct zone *zone, struct page *page,
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int migratetype)
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{
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unsigned long size = 1 << high;
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struct page *current_buddy, *next_page;
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struct page *current_buddy;
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while (high > low) {
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high--;
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size >>= 1;
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if (target >= &page[size]) {
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next_page = page + size;
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current_buddy = page;
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page = page + size;
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} else {
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next_page = page;
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current_buddy = page + size;
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}
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page = next_page;
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if (set_page_guard(zone, current_buddy, high, migratetype))
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continue;
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