doc/kernel-parameters.txt: add early_ioremap_debug

Add description of early_ioremap_debug kernel parameter.

Signed-off-by: Mark Salter <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Dave Young <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index bc3478581f67ee05d31a58e73cf6fd3e6fcc2b68..b6c67d592be5abee31b7bed72beca0cdc273b7e6 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -884,6 +884,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Enable debug messages at boot time.  See
                        Documentation/dynamic-debug-howto.txt for details.
 
+       early_ioremap_debug [KNL]
+                       Enable debug messages in early_ioremap support. This
+                       is useful for tracking down temporary early mappings
+                       which are not unmapped.
+
        earlycon=       [KNL] Output early console device and options.
                uart[8250],io,<addr>[,options]
                uart[8250],mmio,<addr>[,options]