diff options
| author | Arnd Bergmann <[email protected]> | 2024-10-30 12:36:41 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2024-11-05 21:41:10 +0100 |
| commit | 4435a125015d3c3d4494a3f4307d23f15d6cb42b (patch) | |
| tree | 2939c98dec999238d167727d5439df2407e349d8 /mm/page_alloc.c | |
| parent | 59b723cd2adbac2a34fc8e12c74ae26ae45bf230 (diff) | |
ACPI: allow building without CONFIG_HAS_IOPORT
CONFIG_HAS_IOPORT will soon become optional and cause a build time
failure when it is disabled but a driver calls inb()/outb(). At the
moment, all architectures that can support ACPI have port I/O, but this
is not necessarily the case in the future on non-x86 architectures.
The result is a set of errors like:
drivers/acpi/osl.c: In function 'acpi_os_read_port':
include/asm-generic/io.h:542:14: error: call to '_inb' declared with attribute error: inb()) requires CONFIG_HAS_IOPORT
Nothing should actually call these functions in this configuration,
and if it does, the result would be undefined behavior today, possibly
a NULL pointer dereference.
Change the low-level functions to return a proper error code when
HAS_IOPORT is disabled.
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'mm/page_alloc.c')
0 files changed, 0 insertions, 0 deletions