Subject: linux-next: build failure after merge of the drivers-x86 tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 15 Jan 2026 14:52:44 +1100

Hi all,

After merging the drivers-x86 tree, today's linux-next build (x86_64
allmodconfig) failed like this:

drivers/platform/x86/lenovo/thinkpad_acpi.c: In function 'display_damage':
drivers/platform/x86/lenovo/thinkpad_acpi.c:11134:23: error: implicit declaration of function 'FIELD_GET' [-Wimplicit-function-declaration]
11134 |         port_status = FIELD_GET(PORT_STATUS, dmg_status);
      |                       ^~~~~~~~~

Caused by commits

  f6b6ce566954 ("platform/x86: thinkpad_acpi: Add support to detect hardware damage detection capability.")
  520448bb6f09 ("platform/x86: thinkpad_acpi: Add sysfs to display details of damaged device.")

and probably exposed by commit

  5523dcfa4f59 ("Fortify: Use C arithmetic not FIELD_xxx() in FORTIFY_REASON defines")

from the kspp tree which removed the include of bitfield.h from
fortify-string.h.  I wonder if this will affect any other (more exotic)
builds?

I have applied the following patch for today, and this (or something
like it) should probably be applied to the drivers-x86 tree.

From: Stephen Rothwell <[email-masked]>
Date: Thu, 15 Jan 2026 14:17:35 +1100
Subject: [PATCH] fix up for "Fortify: Use C arithmetic not FIELD_xxx() in
 FORTIFY_REASON defines"

interacting with commits

  f6b6ce566954 ("platform/x86: thinkpad_acpi: Add support to detect hardware dam
age detection capability.")
  520448bb6f09 ("platform/x86: thinkpad_acpi: Add sysfs to display details of da
maged device.")

from the drivers-x86 tree.

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 drivers/platform/x86/lenovo/thinkpad_acpi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/x86/lenovo/thinkpad_acpi.c b/drivers/platform/x86/lenovo/thinkpad_acpi.c
index 95755fa1e008..a272f27e6227 100644
--- a/drivers/platform/x86/lenovo/thinkpad_acpi.c
+++ b/drivers/platform/x86/lenovo/thinkpad_acpi.c
@@ -36,6 +36,7 @@
 
 #include <linux/acpi.h>
 #include <linux/backlight.h>
+#include <linux/bitfield.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/dmi.h>
-- 
2.52.0

-- 
Cheers,
Stephen Rothwell