autofs4: correct offset mount expire check

[linux-2.6-omap-h63xx.git] / Documentation / kbuild / modules.txt

diff --git a/Documentation/kbuild/modules.txt b/Documentation/kbuild/modules.txt
index 769ee05ee4d1f6da279386c2325ff5f80e322570..1821c077b435cd64eac847dc1ec69d5386dc6ad6 100644 (file)
--- a/Documentation/kbuild/modules.txt
+++ b/Documentation/kbuild/modules.txt
@@ -249,7 +249,7 @@ following files:
                --> filename: Makefile
                KERNELDIR := /lib/modules/`uname -r`/build
                all::
-                       $(MAKE) -C $KERNELDIR M=`pwd` $@
+                       $(MAKE) -C $(KERNELDIR) M=`pwd` $@
 
                # Module specific targets
                genbin:
@@ -486,7 +486,7 @@ Module.symvers contains a list of all exported symbols from a kernel build.
        Sometimes, an external module uses exported symbols from another
        external module. Kbuild needs to have full knowledge on all symbols
        to avoid spitting out warnings about undefined symbols.
-       Two solutions exist to let kbuild know all symbols of more than
+       Three solutions exist to let kbuild know all symbols of more than
        one external module.
        The method with a top-level kbuild file is recommended but may be
        impractical in certain situations.
@@ -523,6 +523,13 @@ Module.symvers contains a list of all exported symbols from a kernel build.
                containing the sum of all symbols defined and not part of the
                kernel.
 
+       Use make variable KBUILD_EXTRA_SYMBOLS in the Makefile
+               If it is impractical to copy Module.symvers from another
+               module, you can assign a space separated list of files to
+               KBUILD_EXTRA_SYMBOLS in your Makfile. These files will be
+               loaded by modpost during the initialisation of its symbol
+               tables.
+
 === 8. Tips & Tricks
 
 --- 8.1 Testing for CONFIG_FOO_BAR