From: David Hildenbrand <david@redhat.com>
Date: Mon, 1 Sep 2025 15:03:35 +0000 (+0200)
Subject: mm/mm/percpu-km: drop nth_page() usage within single allocation
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=cb77aa60a0a45db626b7b9db864be38a150a06f7;p=users%2Fhch%2Fmisc.git

mm/mm/percpu-km: drop nth_page() usage within single allocation

We're allocating a higher-order page from the buddy.  For these pages
(that are guaranteed to not exceed a single memory section) there is no
need to use nth_page().

Link: https://lkml.kernel.org/r/20250901150359.867252-15-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/percpu-km.c b/mm/percpu-km.c
index fe31aa19db81..4efa74a495cb 100644
--- a/mm/percpu-km.c
+++ b/mm/percpu-km.c
@@ -69,7 +69,7 @@ static struct pcpu_chunk *pcpu_create_chunk(gfp_t gfp)
 	}
 
 	for (i = 0; i < nr_pages; i++)
-		pcpu_set_page_chunk(nth_page(pages, i), chunk);
+		pcpu_set_page_chunk(pages + i, chunk);
 
 	chunk->data = pages;
 	chunk->base_addr = page_address(pages);