LinuxKPI: Add acpi_dev_present() function.

[wulf]

Summary

acpi_dev_present detects that a given ACPI device is present based on
Hardware ID, Unique ID and Hardware Revision of the device.

Sponsored by: Serenity Cyber Security, LLC
MFC after: 1 week

[manu]

sys/compat/linuxkpi/common/src/linux_acpi.c

318

Duplicate ?

[wulf]

sys/compat/linuxkpi/common/src/linux_acpi.c

318

this is a dummy function for !DEV_ACPI case.
Only one of lkpi_acpi_dev_present implementations is compiled depending on arch and device acpi presence.

[manu]

sys/compat/linuxkpi/common/src/linux_acpi.c

318

Oh sorry, I didn't expand the context.

[bz]

sys/compat/linuxkpi/common/include/acpi/acpi_bus.h

40

Is there a reason to have the re-define above and not below the function declarations? The #define is the actual implementation of the command,

sys/compat/linuxkpi/common/src/linux_acpi.c

204

In this case I'd put { } around the block; it's no extra vertical space but with the else opening a block makes it more readable.

[wulf]

sys/compat/linuxkpi/common/include/acpi/acpi_bus.h

40

The only reason is my own style(9). In C language #define may be placed anywhere as it is processed before other code.