From: Kemeng Shi shikemeng@huaweicloud.com
mainline inclusion from mainline-v6.7-rc1 commit 0dfca313a009c83e2ad44b3719dc1222df6c6db5 category: cleanup bugzilla: https://gitee.com/openeuler/kernel/issues/IBC4T0
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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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 Signed-off-by: Liu Shixin liushixin2@huawei.com --- mm/page_alloc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index fb6008b30b48..3cc5d5c7826e 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6937,20 +6937,18 @@ static void break_down_buddy_pages(struct zone *zone, struct page *page, int migratetype) { unsigned long size = 1 << high; - struct page *current_buddy, *next_page; + struct page *current_buddy;
while (high > low) { high--; size >>= 1;
if (target >= &page[size]) { - next_page = page + size; current_buddy = page; + page = page + size; } else { - next_page = page; current_buddy = page + size; } - page = next_page;
if (set_page_guard(zone, current_buddy, high, migratetype)) continue;