mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-09 15:29:16 +00:00
fcbfe8121a
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 <arnd@kernel.org> Signed-off-by: Arnd Bergmann <arnd@kernel.org> Acked-by: Johannes Berg <johannes@sipsolutions.net> # for ARCH=um Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>