linux-kernel - [PATCH 03/11] PageSlab: eliminate unnecessary compound

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Date:   Tue, 12 Oct 2021 14:01:40 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     linux-mm@...ck.org
Cc:     Matthew Wilcox <willy@...radead.org>,
        Kent Overstreet <kent.overstreet@...il.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...e.com>, Roman Gushchin <guro@...com>,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: [PATCH 03/11] PageSlab: eliminate unnecessary compound_head() calls in kernel/resource

virt_to_head_page() implies it.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 kernel/resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/resource.c b/kernel/resource.c
index a363211fda99..ca9f5198a01f 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -151,7 +151,7 @@ static void free_resource(struct resource *res)
 	if (!res)
 		return;
 
-	if (!PageSlab(compound_head(virt_to_head_page(res)))) {
+	if (!PageSlab(virt_to_head_page(res))) {
 		spin_lock(&bootmem_resource_lock);
 		res->sibling = bootmem_resource_free;
 		bootmem_resource_free = res;
-- 
2.32.0