Since we don't have port I/O support, we should turn HAS_IOPORT_MAP
off as well. It will fix clang warnings like below:
./include/asm-generic/io.h:1175:55: warning: performing pointer arithmetic on a
null pointer has undefined behavior [-Wnull-pointer-arithmetic]
1175 | return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
| ~~~~~~~~~~ ^
Reported-by: kernel test robot <l...@intel.com>
Closes:
https://lore.kernel.org/oe-kbuild-all/202506271049.mtzhqdsd-...@intel.com/
Fixes: b8c9c3b822fe ("um: stop using PCI port I/O")
Signed-off-by: Tiwei Bie <tiwei....@antgroup.com>
---
Strictly speaking, the -Wnull-pointer-arithmetic warnings reported
by lkp has been fixed by commit b8c9c3b822fe ("um: stop using PCI
port I/O"). But it introduced new -Wnull-pointer-arithmetic warnings,
and this patch fixes the newly introduced warnings.
arch/um/Kconfig | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index f08e8a7fac93..76aa954520b1 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -54,6 +54,9 @@ config UML_IOMEM_EMULATION
select INDIRECT_IOMEM
select GENERIC_PCI_IOMAP
+config NO_IOPORT_MAP
+ def_bool y
+
config ISA
bool
--
2.34.1
