On 29/07/14 14:08, Hanjun Guo wrote:

On 2014-7-29 2:29, Sudeep Holla wrote:
[...]

quoted

quoted

+
+/*
+ * We never plan to use RSDT on arm/arm64 as its deprecated in spec but this
+ * variable is still required by the ACPI core
+ */
+u32 acpi_rsdt_forced;

This looks like yet another stray variable not used anywhere including
core ACPI

It will be used by ACPICA to get the RSDP in acpi_tb_parse_root_table()
in tbutils.c.

No I couldn't find it in mainline/acpica/linux-next(pm tree).

On further digging found that commit fab461058385("ACPICA: Cleanup the
option of forcing the use of the RSDT") has renamed it to
acpi_gbl_do_not_use_xsdt and moved it into acpica with default false.
So you can remove this.

Regards,
Sudeep