swiotlb: update format

Documentation/kernel-parameters.txt doesn't contain up-to-date
documentation regarding swiotlb= parameter. Update it.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 50680a59a2ff..557763487a1a 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3061,7 +3061,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         controller if no parameter or 1 is given or disable
                         it if 0 is given (See Documentation/cgroups/memory.txt)
 
-        swiotlb=        [IA-64] Number of I/O TLB slabs
+        swiotlb=        [ARM,IA-64,PPC,MIPS,X86]
+                        Format: { <int> | force }
+                        <int> -- Number of I/O TLB slabs
+                        force -- force using of bounce buffers even if they
+                                 wouldn't be automatically used by the kernel
 
         switches=       [HW,M68k]