From fcbfe8121a45152a3cfbe1c28c96a3b611b7347d Mon Sep 17 00:00:00 2001 From: Niklas Schnelle Date: Thu, 23 Mar 2023 17:33:52 +0100 Subject: Kconfig: introduce HAS_IOPORT option and select it as necessary We introduce a new HAS_IOPORT Kconfig option to indicate support for I/O Port access. In a future patch HAS_IOPORT=n will disable compilation of the I/O accessor functions inb()/outb() and friends on architectures which can not meaningfully support legacy I/O spaces such as s390. The following architectures do not select HAS_IOPORT: * ARC * C-SKY * Hexagon * Nios II * OpenRISC * s390 * User-Mode Linux * Xtensa All other architectures select HAS_IOPORT at least conditionally. The "depends on" relations on HAS_IOPORT in drivers as well as ifdefs for HAS_IOPORT specific sections will be added in subsequent patches on a per subsystem basis. Co-developed-by: Arnd Bergmann Signed-off-by: Arnd Bergmann Acked-by: Johannes Berg # for ARCH=um Acked-by: Geert Uytterhoeven Signed-off-by: Niklas Schnelle Signed-off-by: Arnd Bergmann --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm64') diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1023e896d46b..b740019c4aee 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -145,6 +145,7 @@ config ARM64 select GENERIC_GETTIMEOFDAY select GENERIC_VDSO_TIME_NS select HARDIRQS_SW_RESEND + select HAS_IOPORT select HAVE_MOVE_PMD select HAVE_MOVE_PUD select HAVE_PCI -- cgit v1.2.3