1 files changed, 9 insertions, 4 deletions

diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 8f63b224ab09..7c2a89ba674c 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -26,11 +26,11 @@ Additional options to the assembler (for built-in and modules).
 
 AFLAGS_MODULE
 --------------------------------------------------
-Addtional module specific options to use for $(AS).
+Additional module specific options to use for $(AS).
 
 AFLAGS_KERNEL
 --------------------------------------------------
-Addtional options for $(AS) when used for assembler
+Additional options for $(AS) when used for assembler
 code for code that is compiled as built-in.
 
 KCFLAGS
@@ -39,12 +39,12 @@ Additional options to the C compiler (for built-in and modules).
 
 CFLAGS_KERNEL
 --------------------------------------------------
-Addtional options for $(CC) when used to compile
+Additional options for $(CC) when used to compile
 code that is compiled as built-in.
 
 CFLAGS_MODULE
 --------------------------------------------------
-Addtional module specific options to use for $(CC).
+Additional module specific options to use for $(CC).
 
 LDFLAGS_MODULE
 --------------------------------------------------
@@ -196,3 +196,8 @@ to be included in the databases, separated by blank space. E.g.:
 To get all available archs you can also specify all. E.g.:
 
     $ make ALLSOURCE_ARCHS=all tags
+
+KBUILD_ENABLE_EXTRA_GCC_CHECKS
+--------------------------------------------------
+If enabled over the make command line with "W=1", it turns on additional
+gcc -W... options for more extensive build-time checking.