Merge tag 'kbuild-v6.12' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Support cross-compiling linux-headers Debian package and kernel-devel
   RPM package

 - Add support for the linux-debug Pacman package

 - Improve module rebuilding speed by factoring out the common code to
   scripts/module-common.c

 - Separate device tree build rules into scripts/Makefile.dtbs

 - Add a new script to generate modules.builtin.ranges, which is useful
   for tracing tools to find symbols in built-in modules

 - Refactor Kconfig and misc tools

 - Update Kbuild and Kconfig documentation

* tag 'kbuild-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (51 commits)
  kbuild: doc: replace "gcc" in external module description
  kbuild: doc: describe the -C option precisely for external module builds
  kbuild: doc: remove the description about shipped files
  kbuild: doc: drop section numbering, use references in modules.rst
  kbuild: doc: throw out the local table of contents in modules.rst
  kbuild: doc: remove outdated description of the limitation on -I usage
  kbuild: doc: remove description about grepping CONFIG options
  kbuild: doc: update the description about Kbuild/Makefile split
  kbuild: remove unnecessary export of RUST_LIB_SRC
  kbuild: remove append operation on cmd_ld_ko_o
  kconfig: cache expression values
  kconfig: use hash table to reuse expressions
  kconfig: refactor expr_eliminate_dups()
  kconfig: add comments to expression transformations
  kconfig: change some expr_*() functions to bool
  scripts: move hash function from scripts/kconfig/ to scripts/include/
  kallsyms: change overflow variable to bool type
  kallsyms: squash output_address()
  kbuild: add install target for modules.builtin.ranges
  scripts: add verifier script for builtin module range data
  ...

.gitignore

@@ -47,7 +47,6 @@
 *.so.dbg
 *.su
 *.symtypes
-*.symversions
 *.tab.[ch]
 *.tar
 *.xz
@@ -71,6 +70,7 @@ modules.order
 /Module.markers
 /modules.builtin
 /modules.builtin.modinfo
+/modules.builtin.ranges
 /modules.nsdeps
 
 #
@@ -143,7 +143,6 @@ GTAGS
 # id-utils files
 ID
 
-*.orig
 *~
 \#*#
 

Documentation/dontdiff

@@ -180,6 +180,7 @@ modpost
 modules-only.symvers
 modules.builtin
 modules.builtin.modinfo
+modules.builtin.ranges
 modules.nsdeps
 modules.order
 modversions.h*

Documentation/kbuild/kbuild.rst

@@ -22,6 +22,11 @@ modules.builtin.modinfo
 This file contains modinfo from all modules that are built into the kernel.
 Unlike modinfo of a separate module, all fields are prefixed with module name.
 
+modules.builtin.ranges
+----------------------
+This file contains address offset ranges (per ELF section) for all modules
+that are built into the kernel. Together with System.map, it can be used
+to associate module names with symbols.
 
 Environment variables
 =====================
@@ -129,6 +134,11 @@ KBUILD_OUTPUT
 -------------
 Specify the output directory when building the kernel.
 
+This variable can also be used to point to the kernel output directory when
+building external modules against a pre-built kernel in a separate build
+directory. Please note that this does NOT specify the output directory for the
+external modules themselves.
+
 The output directory can also be specified using "O=...".
 
 Setting "O=..." takes precedence over KBUILD_OUTPUT.

Documentation/kbuild/kconfig-language.rst

@@ -70,7 +70,11 @@ applicable everywhere (see syntax).
 
   Every menu entry can have at most one prompt, which is used to display
   to the user. Optionally dependencies only for this prompt can be added
-  with "if".
+  with "if". If a prompt is not present, the config option is a non-visible
+  symbol, meaning its value cannot be directly changed by the user (such as
+  altering the value in ``.config``) and the option will not appear in any
+  config menus. Its value can only be set via "default" and "select" (see
+  below).
 
 - default value: "default" <expr> ["if" <expr>]
 

Documentation/kbuild/makefiles.rst

@@ -1665,6 +1665,5 @@ Credits
 TODO
 ====
 
-- Describe how kbuild supports shipped files with _shipped.
 - Generating offset header files.
 - Add more variables to chapters 7 or 9?