The wistron_btns driver calls rtc_cmos_read(), which isn't
available with UML builds, so disable this driver on UML.

Prevents this build error:

ld: drivers/input/misc/wistron_btns.o: in function `poll_bios':
wistron_btns.c:(.text+0x4be): undefined reference to `rtc_cmos_read'

Fixes: 0bbadafdc49d ("um: allow disabling NO_IOMEM") # v5.14+
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Miloslav Trmac <mitr@volny.cz>
Cc: linux-input@vger.kernel.org
Cc: linux-um@lists.infradead.org
---
 drivers/input/misc/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -- a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -330,7 +330,7 @@ config INPUT_CPCAP_PWRBUTTON
 
 config INPUT_WISTRON_BTNS
 	tristate "x86 Wistron laptop button interface"
-	depends on X86_32
+	depends on X86_32 && !UML
 	select INPUT_SPARSEKMAP
 	select NEW_LEDS
 	select LEDS_CLASS

On Wed, Nov 30, 2022 at 08:16:04AM -0800, Randy Dunlap wrote:
> The wistron_btns driver calls rtc_cmos_read(), which isn't
> available with UML builds, so disable this driver on UML.
> 
> Prevents this build error:
> 
> ld: drivers/input/misc/wistron_btns.o: in function `poll_bios':
> wistron_btns.c:(.text+0x4be): undefined reference to `rtc_cmos_read'
> 
> Fixes: 0bbadafdc49d ("um: allow disabling NO_IOMEM") # v5.14+
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: Johannes Berg <johannes.berg@intel.com>
> Cc: Richard Weinberger <richard@nod.at>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: Miloslav Trmac <mitr@volny.cz>
> Cc: linux-input@vger.kernel.org
> Cc: linux-um@lists.infradead.org

Applied, thank you.

-- 
Dmitry