ACPI: add "acpi_no_auto_ssdt" bootparam

"acpi_no_auto_ssdt" prevents Linux from automatically loading
all the SSDTs listed in the RSDT/XSDT.

This is needed for debugging.  In particular,
it allows a DSDT override to optionally be a DSDT+SSDT override.

http://bugzilla.kernel.org/show_bug.cgi?id=3774

Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index fb80e9ffea68..379931e74334 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -166,6 +166,8 @@ and is between 256 and 4096 characters. It is defined in the file
         acpi_irq_isa=   [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
                         Format: <irq>,<irq>...
 
+        acpi_no_auto_ssdt       [HW,ACPI] Disable automatic loading of SSDT
+
         acpi_os_name=   [HW,ACPI] Tell ACPI BIOS the name of the OS
                         Format: To spoof as Windows 98: ="Microsoft Windows"