Defined in 2 files as a macro:

• include/acpi/platform/acenv.h, line 48 (as a macro)
• include/acpi/platform/aclinux.h, line 119 (as a macro)

Referenced in 2 files:

• drivers/acpi/acpica/utalloc.c, line 17
• tools/power/acpi/os_specific/service_layers/osunixxf.c, line 538