Re: include/asm-generic/io.h:542:14: error: call to '_inb' declared with attribute error: inb()) requires CONFIG_HAS_IOPORT

["Arnd Bergmann" <arnd@arndb.de>]

On Fri, Jun 6, 2025, at 01:02, kernel test robot wrote:

> commit: b8c9c3b822fe8e033b9802516f6466099d915488 um: stop using PCI 
> port I/O

>    In function 'inb_p',
>        inlined from 'sonypi_irq' at drivers/char/sonypi.c:831:7:
>>> include/asm-generic/io.h:542:14: error: call to '_inb' declared with attribute error: inb()) requires CONFIG_HAS_IOPORT

It appears that there are some drivers that are only built when
targetting i386 but that now fail to build for UM. I'll send
these three fixups, which should be enough to fix a
'make ARCH=um SUBARCH=i386 allmodconfig' build.

      Arnd

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index f2a68a0a8c93..a20b353ffddf 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -238,6 +238,7 @@ config APPLICOM
 config SONYPI
 	tristate "Sony Vaio Programmable I/O Control Device support"
 	depends on X86_32 && PCI && INPUT
+	depends on HAS_IOPORT
 	depends on ACPI_EC || !ACPI
 	help
 	  This driver enables access to the Sony Programmable I/O Control
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index bec3bffca808..464ed9bf9114 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -1531,6 +1531,7 @@ config I2C_XGENE_SLIMPRO
 config SCx200_ACB
 	tristate "Geode ACCESS.bus support"
 	depends on X86_32 && PCI
+	depends on HAS_IOPORT
 	help
 	  Enable the use of the ACCESS.bus controllers on the Geode SCx200 and
 	  SC1100 processors and the CS5535 and CS5536 Geode companion devices.
diff --git a/drivers/video/fbdev/nvidia/nv_local.h b/drivers/video/fbdev/nvidia/nv_local.h
index 68e508daa417..93aff35305a9 100644
--- a/drivers/video/fbdev/nvidia/nv_local.h
+++ b/drivers/video/fbdev/nvidia/nv_local.h
@@ -80,7 +80,7 @@
      (par)->dmaFree -= ((size) + 1);          \
 }
 
-#if defined(__i386__)
+#if defined(__i386__) && !defined(CONFIG_UML)
 #define _NV_FENCE() outb(0, 0x3D0);
 #else
 #define _NV_FENCE() mb();
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index e00536b49552..329aa9016553 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -650,6 +650,7 @@ config PATA_CS5535
 config PATA_CS5536
 	tristate "CS5536 PATA support"
 	depends on PCI && (X86_32 || MIPS || COMPILE_TEST)
+	depends on HAS_IOPORT
 	help
 	  This option enables support for the AMD CS5536
 	  companion chip used with the Geode LX processor family.
diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c
index b811efd2cc34..4a9fb4249caf 100644
--- a/drivers/ata/pata_cs5536.c
+++ b/drivers/ata/pata_cs5536.c
@@ -27,7 +27,7 @@
 #include <scsi/scsi_host.h>
 #include <linux/dmi.h>
 
-#ifdef CONFIG_X86_32
+#if defined(CONFIG_X86_32) && !defined(CONFIG_UML)
 #include <asm/msr.h>
 static int use_msr;
 module_param_named(msr, use_msr, int, 0644);