[moderation/CI] Re: exfat: validate cached iomaps during buffered writes and writeback

syzbot ci has tested the following series

[v2] exfat: validate cached iomaps during buffered writes and writeback
https://lore.kernel.org/all/[email protected]
* [PATCH v2] exfat: validate cached iomaps during buffered writes and writeback

and found the following issue:
kernel build error

Full report is available here:
https://ci.syzbot.org/series/042f1a43-e00d-4e0e-a158-b90b5a9e5e21

***

kernel build error

tree:      torvalds
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base:      4a50a141f05a8d1737661b19ee22ff8455b94409
arch:      amd64
compiler:  Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
config:    https://ci.syzbot.org/builds/2c231533-626e-44ad-a205-fc1a8ffbe29c/config

fs/exfat/iomap.c:206:7: error: call to undeclared function 'exfat_iomap_valid'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
fs/exfat/iomap.c:275:13: error: conflicting types for 'exfat_iomap_valid'

***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: [email protected]

---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at [email protected].

To test a patch for this bug, please reply with `#syz test`
(should be on a separate line).

The patch should be attached to the email.
Note: arguments like custom git repos and branches are not supported.

The email will later be sent to:
[[email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected]]

If the report looks fine to you, reply with:
#syz upstream

If the report is a false positive, reply with
#syz invalid