Merge tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy...

Pull Kbuild updates from Masahiro Yamada:

 - remove headers_{install,check}_all targets

 - remove unreasonable 'depends on !UML' from CONFIG_SAMPLES

 - re-implement 'make headers_install' more cleanly

 - add new header-test-y syntax to compile-test headers

 - compile-test exported headers to ensure they are compilable in
   user-space

 - compile-test headers under include/ to ensure they are self-contained

 - remove -Waggregate-return, -Wno-uninitialized, -Wno-unused-value
   flags

 - add -Werror=unknown-warning-option for Clang

 - add 128-bit built-in types support to genksyms

 - fix missed rebuild of modules.builtin

 - propagate 'No space left on device' error in fixdep to Make

 - allow Clang to use its integrated assembler

 - improve some coccinelle scripts

 - add a new flag KBUILD_ABS_SRCTREE to request Kbuild to use absolute
   path for $(srctree).

 - do not ignore errors when compression utility is missing

 - misc cleanups

* tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (49 commits)
  kbuild: use -- separater intead of $(filter-out ...) for cc-cross-prefix
  kbuild: Inform user to pass ARCH= for make mrproper
  kbuild: fix compression errors getting ignored
  kbuild: add a flag to force absolute path for srctree
  kbuild: replace KBUILD_SRCTREE with boolean building_out_of_srctree
  kbuild: remove src and obj from the top Makefile
  scripts/tags.sh: remove unused environment variables from comments
  scripts/tags.sh: drop SUBARCH support for ARM
  kbuild: compile-test kernel headers to ensure they are self-contained
  kheaders: include only headers into kheaders_data.tar.xz
  kheaders: remove meaningless -R option of 'ls'
  kbuild: support header-test-pattern-y
  kbuild: do not create wrappers for header-test-y
  kbuild: compile-test exported headers to ensure they are self-contained
  init/Kconfig: add CONFIG_CC_CAN_LINK
  kallsyms: exclude kasan local symbols on s390
  kbuild: add more hints about SUBDIRS replacement
  coccinelle: api/stream_open: treat all wait_.*() calls as blocking
  coccinelle: put_device: Add a cast to an expression for an assignment
  coccinelle: put_device: Adjust a message construction
  ...

diff --cc Documentation/kbuild/headers_install.rst
Simple merge

diff --cc Documentation/kbuild/kbuild.rst
index e774e760522dc4de1d3f2e900bfd92cf557938c1,dcfeb32e336035cdb4b5020d0089a0a885f15512..b25548963d70194accda66b84aa89866e2c06d2e
--- 1/Documentation/kbuild/kbuild.rst
--- 2/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.rst
@@@ -200,8 -183,17 +200,17 @@@ The output directory is often set usin
  
  The value can be overridden in which case the default value is ignored.
  
+ KBUILD_ABS_SRCTREE
+ --------------------------------------------------
+ Kbuild uses a relative path to point to the tree when possible. For instance,
+ when building in the source tree, the source tree path is '.'
+ 
+ Setting this flag requests Kbuild to use absolute path to the source tree.
+ There are some useful cases to do so, like when generating tag files with
+ absolute path entries etc.
+ 
  KBUILD_SIGN_PIN
 ---------------------------------------------------
 +---------------
  This variable allows a passphrase or PIN to be passed to the sign-file
  utility when signing kernel modules, if the private key requires such.
  

diff --cc Documentation/kbuild/makefiles.rst
index 9274cdcc9bd23bc23f8c942cb8479560819d8292,b817e6cefb7794b147b9aed0053af8440a1a1e48..093f2d79ab95d9853b8d088f8d47f5acc650ed56
--- 1/Documentation/kbuild/makefiles.rst
--- 2/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.rst
@@@ -995,15 -894,10 +995,11 @@@ When kbuild executes, the following ste
        means for an architecture to override the defaults.
  
  
 ---- 6.2 Add prerequisites to archheaders:
 +6.2 Add prerequisites to archheaders
 +------------------------------------
  
        The archheaders: rule is used to generate header files that
-       may be installed into user space by "make header_install" or
-       "make headers_install_all".  In order to support
-       "make headers_install_all", this target has to be able to run
-       on an unconfigured tree, or a tree configured for another
-       architecture.
+       may be installed into user space by "make header_install".
  
        It is run before "make archprepare" when run on the
        architecture itself.
@@@ -1140,18 -1018,33 +1136,34 @@@
        In this example, extra-y is used to list object files that
        shall be built, but shall not be linked as part of built-in.a.
  
+     header-test-y
+ 
+       header-test-y specifies headers (*.h) in the current directory that
+       should be compile tested to ensure they are self-contained,
+       i.e. compilable as standalone units. If CONFIG_HEADER_TEST is enabled,
+       this builds them as part of extra-y.
+ 
+     header-test-pattern-y
+ 
+       This works as a weaker version of header-test-y, and accepts wildcard
+       patterns. The typical usage is:
+ 
+                 header-test-pattern-y += *.h
+ 
+       This specifies all the files that matches to '*.h' in the current
+       directory, but the files in 'header-test-' are excluded.
  
 ---- 6.7 Commands useful for building a boot image
 +6.7 Commands useful for building a boot image
 +---------------------------------------------
  
 -      Kbuild provides a few macros that are useful when building a
 -      boot image.
 +    Kbuild provides a few macros that are useful when building a
 +    boot image.
  
      if_changed
 -
        if_changed is the infrastructure used for the following commands.
  
 -      Usage:
 +      Usage::
 +
                target: source(s) FORCE
                        $(call if_changed,ld/objcopy/gzip/...)
  

diff --cc Makefile
Simple merge

diff --cc arch/arc/Makefile
Simple merge

diff --cc arch/parisc/Makefile
Simple merge

diff --cc arch/powerpc/configs/ppc6xx_defconfig
Simple merge

diff --cc arch/s390/configs/debug_defconfig
Simple merge

diff --cc init/Kconfig
Simple merge

diff --cc lib/Kconfig.debug
Simple merge

diff --cc scripts/Kbuild.include
index ee58cde8ee3bdd22a22e8b8e87f7c9d887400bf4,c62d690c7dcf9d1f5eafac2145cbcf5396d94f24..73e80b917f129faabc11621706c02781cef0cf89
--- 1/scripts/Kbuild.include
--- 2/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@@ -210,15 -204,15 +204,15 @@@ objectify = $(foreach o,$(1),$(if $(fil
  # if_changed_dep  - as if_changed, but uses fixdep to reveal dependencies
  #                   including used config symbols
  # if_changed_rule - as if_changed but execute rule instead
 -# See Documentation/kbuild/makefiles.txt for more info
 +# See Documentation/kbuild/makefiles.rst for more info
  
  ifneq ($(KBUILD_NOCMDDEP),1)
- # Check if both arguments are the same including their order. Result is empty
+ # Check if both commands are the same including their order. Result is empty
  # string if equal. User may override this check using make KBUILD_NOCMDDEP=1
- arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
+ cmd-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
                           $(subst $(space),$(space_escape),$(strip $(cmd_$1))))
  else
- arg-check = $(if $(strip $(cmd_$@)),,1)
+ cmd-check = $(if $(strip $(cmd_$@)),,1)
  endif
  
  # Replace >$< with >$$< to preserve $ when reloading the .cmd file

diff --cc scripts/Makefile.host
Simple merge

diff --cc scripts/coccinelle/api/kstrdup.cocci
Simple merge