From: David Hildenbrand <david@redhat.com>
Date: Fri, 5 Sep 2025 06:38:43 +0000 (+0200)
Subject: fixup: mm/gup: remove record_subpages()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=061b80989efa0cbdf0c6feafdc5bf5055d603654;p=users%2Fjedix%2Flinux-maple.git

fixup: mm/gup: remove record_subpages()

pages is not adjusted by the caller, but indexed by existing *nr.

Link: https://lkml.kernel.org/r/cc7f03f8-da8b-407e-a03a-e8e5a9ec5462@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reported-by: syzbot+1ab243d3eebb2aabf4a4@syzkaller.appspotmail.com
Tested-by: syzbot+1ab243d3eebb2aabf4a4@syzkaller.appspotmail.com
Reported-by: Jens Axboe <axboe@kernel.dk>
Tested-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/gup.c b/mm/gup.c
index 2db2cfd0ec9f..b8aee964421c 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -2979,6 +2979,7 @@ static int gup_fast_pmd_leaf(pmd_t orig, pmd_t *pmdp, unsigned long addr,
 		return 0;
 	}
 
+	pages += *nr;
 	*nr += refs;
 	for (; refs; refs--)
 		*(pages++) = page++;
@@ -3022,6 +3023,7 @@ static int gup_fast_pud_leaf(pud_t orig, pud_t *pudp, unsigned long addr,
 		return 0;
 	}
 
+	pages += *nr;
 	*nr += refs;
 	for (; refs; refs--)
 		*(pages++) = page++;