1 files changed, 23 insertions, 16 deletions

diff --git a/Makefile b/Makefile
index 25b35992a02c..dc82462b68ba 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
-SUBLEVEL = 19
-EXTRAVERSION =-rc3
+SUBLEVEL = 20
+EXTRAVERSION =-rc1
 NAME=Avast! A bilge rat!
 
 # *DOCUMENTATION*
@@ -10,8 +10,11 @@ NAME=Avast! A bilge rat!
 # Comments in this file are targeted only to the developer, do not
 # expect to learn how to build the kernel reading this file.
 
-# Do not print "Entering directory ..."
-MAKEFLAGS += --no-print-directory
+# Do not:
+# o  use make's built-in rules and variables
+#    (this increases performance and avoid hard-to-debug behavour);
+# o  print "Entering directory ...";
+MAKEFLAGS += -rR --no-print-directory
 
 # We are using a recursive build, so we need to do a little thinking
 # to get the ordering right.
@@ -271,12 +274,8 @@ export quiet Q KBUILD_VERBOSE
 # Look for make include files relative to root of kernel src
 MAKEFLAGS += --include-dir=$(srctree)
 
-# We need some generic definitions
-include  $(srctree)/scripts/Kbuild.include
-
-# Do not use make's built-in rules and variables
-# This increases performance and avoid hard-to-debug behavour
-MAKEFLAGS += -rR
+# We need some generic definitions.
+include $(srctree)/scripts/Kbuild.include
 
 # Make variables (CC, etc...)
 
@@ -1101,9 +1100,9 @@ boards := $(notdir $(boards))
 
 help:
         @echo  'Cleaning targets:'
-        @echo  '  clean           - remove most generated files but keep the config and'
+        @echo  '  clean           - Remove most generated files but keep the config and'
         @echo  '                    enough build support to build external modules'
-        @echo  '  mrproper        - remove all generated files + config + various backup files'
+        @echo  '  mrproper        - Remove all generated files + config + various backup files'
         @echo  '  distclean       - mrproper + remove editor backup and patch files'
         @echo  ''
         @echo  'Configuration targets:'
@@ -1391,12 +1390,18 @@ endif #ifeq ($(mixed-targets),1)
 
 PHONY += checkstack kernelrelease kernelversion
 
-# Use $(SUBARCH) here instead of $(ARCH) so that this works for UML.
-# In the UML case, $(SUBARCH) is the name of the underlying
-# architecture, while for all other arches, it is the same as $(ARCH).
+# UML needs a little special treatment here.  It wants to use the host
+# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
+# else wants $(ARCH), including people doing cross-builds, which means
+# that $(SUBARCH) doesn't work here.
+ifeq ($(ARCH), um)
+CHECKSTACK_ARCH := $(SUBARCH)
+else
+CHECKSTACK_ARCH := $(ARCH)
+endif
 checkstack:
         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
-        $(PERL) $(src)/scripts/checkstack.pl $(SUBARCH)
+        $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
 
 kernelrelease:
         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
@@ -1484,6 +1489,8 @@ endif	# skip-makefile
 PHONY += FORCE
 FORCE:
 
+# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
+Makefile: ;
 
 # Declare the contents of the .PHONY variable as phony.  We keep that
 # information in a variable se we can use it in if_changed and friends.