linux-kernel - [PATCH 00/27] kbuild: yet another series of cleanups (modpost and LTO)

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Date:   Mon, 25 Apr 2022 04:07:44 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        llvm@...ts.linux.dev
Subject: [PATCH 00/27] kbuild: yet another series of cleanups (modpost and LTO)

This is the third batch of cleanups in this development cycle.

This weekend, I wrote up the code I have been planning.

After a bunch of modpost refactoring, I got rid of the ugly code
in Makefiles.

With this, Kbuild will get back much simpler and cleaner.



Masahiro Yamada (27):
  modpost: use snprintf() instead of sprintf() for safety
  modpost: do not write out any file when error occurred
  modpost: remove stale comment about sym_add_exported()
  modpost: add a separate error for exported symbols without definition
  modpost: retrieve the module dependency and CRCs in check_exports()
  modpost: use bool type where appropriate
  modpost: import include/linux/list.h
  modpost: traverse modules in order
  modpost: add sym_add_unresolved() helper
  modpost: traverse unresolved symbols in order
  modpost: use doubly linked list for dump_lists
  modpost: move struct namespace_list to modpost.c
  modpost: traverse the namespace_list in order
  modpost: dump Module.symvers in the same order of modules.order
  modpost: move static EXPORT_SYMBOL check to check_exports()
  modpost: make multiple export error
  modpost: make sym_add_exported() always allocate a new symbol
  modpost: make sym_add_exported() a void function
  modpost: use hlist for hash table implementation
  modpost: mitigate false-negatives for static EXPORT_SYMBOL checks
  kbuild: record symbol versions in *.cmd files
  kbuild: generate a list of objects in vmlinux
  modpost: retrieve symbol versions by parsing *.cmd files
  modpost: generate linker script to collect symbol versions
  kbuild: embed symbol versions at final link of vmlinux or modules
  kbuild: stop generating *.symversions
  kbuild: do not create *.prelink.o for Clang LTO or IBT

 .gitignore                |   1 +
 Makefile                  |   1 +
 scripts/Kbuild.include    |   4 +
 scripts/Makefile.build    | 107 ++------
 scripts/Makefile.lib      |   7 -
 scripts/Makefile.modfinal |   6 +-
 scripts/Makefile.modpost  |   9 +-
 scripts/link-vmlinux.sh   |  38 ++-
 scripts/mod/file2alias.c  |   2 -
 scripts/mod/list.h        | 336 ++++++++++++++++++++++++
 scripts/mod/modpost.c     | 529 +++++++++++++++++++++++---------------
 scripts/mod/modpost.h     |  27 +-
 12 files changed, 731 insertions(+), 336 deletions(-)
 create mode 100644 scripts/mod/list.h

-- 
2.32.0