From: Andrew Morton <akpm@linux-foundation.org>
Date: Thu, 4 Sep 2025 02:51:59 +0000 (-0700)
Subject: mm-constify-highmem-related-functions-for-improved-const-correctness-fix
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=3f7e824f30f2a0e149d14fb1546de45d55b51828;p=users%2Fjedix%2Flinux-maple.git

mm-constify-highmem-related-functions-for-improved-const-correctness-fix

nastily "fix" folio_page()

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index faf17ca211b4..a57411252564 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -316,9 +316,9 @@ static __always_inline unsigned long _compound_head(const struct page *page)
  * check that the page number lies within @folio; the caller is presumed
  * to have a reference to the page.
  */
-static inline struct page *folio_page(struct folio *folio, unsigned long n)
+static inline struct page *folio_page(const struct folio *folio, unsigned long n)
 {
-	return &folio->page + n;
+	return (struct page *)(&folio->page + n);
 }
 
 static __always_inline int PageTail(const struct page *page)