1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index fa885174fd75..bebebe4fd469 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -816,6 +816,11 @@ and is between 256 and 4096 characters. It is defined in the file
         lasi=           [HW,SCSI] PARISC LASI driver for the 53c700 chip
                         Format: addr:<io>,irq:<irq>
 
+        legacy_serial.force [HW,IA-32,X86-64]
+                        Probe for COM ports at legacy addresses even
+                        if PNPBIOS or ACPI should describe them.  This
+                        is for working around firmware defects.
+
         llsc*=          [IA64] See function print_params() in
                         arch/ia64/sn/kernel/llsc4.c.