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| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2023-03-23 17:33:52 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2023-04-05 22:15:19 +0200 |
| commit | fcbfe8121a45152a3cfbe1c28c96a3b611b7347d (patch) | |
| tree | 3f1e4c0bd1979e56e9438396bea7686466c59dfe /arch/alpha | |
| parent | Linux 6.3-rc1 (diff) | |
| download | linux-fcbfe8121a45152a3cfbe1c28c96a3b611b7347d.tar.xz linux-fcbfe8121a45152a3cfbe1c28c96a3b611b7347d.zip | |
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 <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>
Diffstat (limited to 'arch/alpha')
| -rw-r--r-- | arch/alpha/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 780d4673c3ca..a5c2b1aa46b0 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -27,6 +27,7 @@ config ALPHA select AUDIT_ARCH select GENERIC_CPU_VULNERABILITIES select GENERIC_SMP_IDLE_THREAD + select HAS_IOPORT select HAVE_ARCH_AUDITSYSCALL select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA |