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

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
  ...

1 files changed, 18 insertions, 33 deletions

diff --git a/kernel/gen_kheaders.sh b/kernel/gen_kheaders.sh
index 9a34e1d9bd7f..9ff449888d9c 100755
--- a/kernel/gen_kheaders.sh
+++ b/kernel/gen_kheaders.sh
@@ -4,24 +4,12 @@
 # This script generates an archive consisting of kernel headers
 # for CONFIG_IKHEADERS.
 set -e
-spath="$(dirname "$(readlink -f "$0")")"
-kroot="$spath/.."
+sfile="$(readlink -f "$0")"
 outdir="$(pwd)"
 tarfile=$1
 cpio_dir=$outdir/$tarfile.tmp
 
-# Script filename relative to the kernel source root
-# We add it to the archive because it is small and any changes
-# to this script will also cause a rebuild of the archive.
-sfile="$(realpath --relative-to $kroot "$(readlink -f "$0")")"
-
-src_file_list="
-include/
-arch/$SRCARCH/include/
-$sfile
-"
-
-obj_file_list="
+dir_list="
 include/
 arch/$SRCARCH/include/
 "
@@ -33,33 +21,29 @@ arch/$SRCARCH/include/
 # Uncomment it for debugging.
 # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter;
 # else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi
-# find $src_file_list -type f | xargs ls -lR > /tmp/src-ls-$iter
-# find $obj_file_list -type f | xargs ls -lR > /tmp/obj-ls-$iter
+# find $src_file_list -name "*.h" | xargs ls -l > /tmp/src-ls-$iter
+# find $obj_file_list -name "*.h" | xargs ls -l > /tmp/obj-ls-$iter
 
 # include/generated/compile.h is ignored because it is touched even when none
 # of the source files changed. This causes pointless regeneration, so let us
 # ignore them for md5 calculation.
-pushd $kroot > /dev/null
-src_files_md5="$(find $src_file_list -type f                       |
+pushd $srctree > /dev/null
+src_files_md5="$(find $dir_list -name "*.h"			   |
 		grep -v "include/generated/compile.h"		   |
 		grep -v "include/generated/autoconf.h"		   |
-		grep -v "include/config/auto.conf"		   |
-		grep -v "include/config/auto.conf.cmd"		   |
-		grep -v "include/config/tristate.conf"		   |
-		xargs ls -lR | md5sum | cut -d ' ' -f1)"
+		xargs ls -l | md5sum | cut -d ' ' -f1)"
 popd > /dev/null
-obj_files_md5="$(find $obj_file_list -type f                       |
+obj_files_md5="$(find $dir_list -name "*.h"			   |
 		grep -v "include/generated/compile.h"		   |
 		grep -v "include/generated/autoconf.h"		   |
-		grep -v "include/config/auto.conf"                 |
-		grep -v "include/config/auto.conf.cmd"		   |
-		grep -v "include/config/tristate.conf"		   |
-		xargs ls -lR | md5sum | cut -d ' ' -f1)"
-
+		xargs ls -l | md5sum | cut -d ' ' -f1)"
+# Any changes to this script will also cause a rebuild of the archive.
+this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)"
 if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi
 if [ -f kernel/kheaders.md5 ] &&
 	[ "$(cat kernel/kheaders.md5|head -1)" == "$src_files_md5" ] &&
 	[ "$(cat kernel/kheaders.md5|head -2|tail -1)" == "$obj_files_md5" ] &&
+	[ "$(cat kernel/kheaders.md5|head -3|tail -1)" == "$this_file_md5" ] &&
 	[ "$(cat kernel/kheaders.md5|tail -1)" == "$tarfile_md5" ]; then
 		exit
 fi
@@ -71,16 +55,16 @@ fi
 rm -rf $cpio_dir
 mkdir $cpio_dir
 
-pushd $kroot > /dev/null
-for f in $src_file_list;
-	do find "$f" ! -name "*.cmd" ! -name ".*";
+pushd $srctree > /dev/null
+for f in $dir_list;
+	do find "$f" -name "*.h";
 done | cpio --quiet -pd $cpio_dir
 popd > /dev/null
 
 # The second CPIO can complain if files already exist which can
 # happen with out of tree builds. Just silence CPIO for now.
-for f in $obj_file_list;
-	do find "$f" ! -name "*.cmd" ! -name ".*";
+for f in $dir_list;
+	do find "$f" -name "*.h";
 done | cpio --quiet -pd $cpio_dir >/dev/null 2>&1
 
 # Remove comments except SDPX lines
@@ -91,6 +75,7 @@ tar -Jcf $tarfile -C $cpio_dir/ . > /dev/null
 
 echo "$src_files_md5" >  kernel/kheaders.md5
 echo "$obj_files_md5" >> kernel/kheaders.md5
+echo "$this_file_md5" >> kernel/kheaders.md5
 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5
 
 rm -rf $cpio_dir