Re: [syzbot] [mm?] WARNING in deferred_split_folio

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+a7067a757858ac8eb085@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: syzbot+a7067a757858ac8eb085@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         36ece969 Add linux-next specific files for 20260331
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1687e46a580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e5c508e55e8ef9a7
dashboard link: https://syzkaller.appspot.com/bug?extid=a7067a757858ac8eb085
compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1285b41f980000

Note: testing is done by a robot and is best-effort only.