[GIT PULL] Kbuild and Kconfig changes for v7.1

Nicolas Schier <[email protected]> Sun, 12 Apr 2026 17:46:47 +0200
Newsgroups	org.kernel.vger.linux-parisc,dev.linux.lists.llvm,dev.linux.lists.loongarch,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-efi,org.kernel.vger.linux-hexagon,org.kernel.vger.linux-kbuild,org.kernel.vger.linux-kernel,org.kernel.vger.linux-s390,org.ozlabs.lists.linuxppc-dev
Message-ID	<adu-ZyIv47FnsVLI@levanger>
Hi Linus,

please pull these changes to Kbuild and Kconfig for v7.1.  Please let me
know if anything is incorrect and not matching your standards.

All changes have been in -next, most for several cycles without reported
problems.

Thanks and kind regards,
Nicolas

---

The following changes since commit 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f:

  Linux 7.0-rc1 (2026-02-22 13:18:59 -0800)

are available in the Git repository at:

  ssh://[email protected]/pub/scm/linux/kernel/git/kbuild/linux.git tags/kbuild-7.1-1

for you to fetch changes up to 404927758daac5ec4594071e033c1fa6ee9ca9b6:

  kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain (2026-04-07 21:48:44 +0200)

----------------------------------------------------------------
Kbuild/Kconfig updates for 7.1

Kbuild changes
==============

  * tools/build: Reject unexpected values for LLVM=

  * kbuild: uapi: remove usage of toolchain headers

  * kbuild: Switch from '-fms-extensions' to '-fms-anonymous-structs'
    when available (currently: clang >= 23.0.0)

  * kbuild: Reduce the number of compiler-generated suffixes for clang
    thin-lto build

  * kbuild: reduce output spam ("GEN Makefile") when building out of tree

  * check-uapi: improve portability for testing headers

  * uapi: also test UAPI headers against C++ compilers

  * kbuild: vdso_install: drop build ID architecture allow-list

  * checksyscalls: only run when necessary

  * Documentation: kbuild: Update the debug information notes in
    reproducible-builds.rst

  * kconfig: forbid multiple entries with the same symbol in a choice

  * kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain


Kconfig changes
===============

  * kconfig: Error out on duplicated kconfig inclusion


Cc: Alexander Coffin <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Bill Wendling <[email protected]>
Cc: David Howells <[email protected]>
Cc: Dodji Seketeli <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: John Moon <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Justin Stitt <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Song Liu <[email protected]>
Cc: Thomas Weißschuh <[email protected]>
Cc: Yonghong Song <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

----------------------------------------------------------------
Arnd Bergmann (3):
      check-uapi: link into shared objects
      check-uapi: honor ${CROSS_COMPILE} setting
      check-uapi: use dummy libc includes

Justin Stitt (1):
      kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain

Masahiro Yamada (1):
      kconfig: forbid multiple entries with the same symbol in a choice

Nathan Chancellor (3):
      kbuild: Consolidate C dialect options
      kbuild: Use '-fms-anonymous-structs' if it is available
      Documentation: kbuild: Update the debug information notes in reproducible-builds.rst

Nicolas Schier (1):
      kconfig: Error out on duplicated kconfig inclusion

Thomas Weißschuh (25):
      Documentation/llvm: drop note about LLVM=0
      tools/build: Reject unexpected values for LLVM=
      hexagon: uapi: Fix structure alignment attribute
      kbuild: uapi: test linux/bpf_perf_event.h on powerpc
      kbuild: uapi: deduplicate linux/bpf_perf_event.h exclusions
      kbuild: uapi: completely exclude linux/bpf_perf_event.h on nios2
      kbuild: uapi: only use dummy-include for headers which use libc
      kbuild: uapi: provide stub includes for some libc headers
      kbuild: uapi: use custom stub headers instead of libc ones
      kbuild: uapi: simplify libc dependency logic
      kbuild: uapi: remove now unneeded guard headers
      kbuild: reduce output spam when building out of tree
      kbuild: uapi: move some compiler arguments out of the command definition
      kbuild: uapi: move all include path flags together
      kbuild: uapi: handle UML in architecture-specific exclusion lists
      kbuild: uapi: provide a C++ compatible dummy definition of NULL
      kbuild: uapi: also test UAPI headers against C++ compilers
      kbuild: vdso_install: split out the readelf invocation
      kbuild: vdso_install: hide readelf warnings
      kbuild: vdso_install: gracefully handle images without build ID
      kbuild: vdso_install: drop build ID architecture allow-list
      checksyscalls: move path to reference table to a variable
      checksyscalls: fail on all intermediate errors
      checksyscalls: only run when necessary
      checksyscalls: move instance functionality into generic code

Yonghong Song (1):
      kbuild: Reduce the number of compiler-generated suffixes for clang thin-lto build

 Documentation/kbuild/llvm.rst                      |  4 --
 Documentation/kbuild/reproducible-builds.rst       |  7 ++-
 Kbuild                                             | 14 +++--
 Makefile                                           | 35 +++++++++---
 arch/arm64/kernel/vdso32/Makefile                  |  3 +-
 arch/hexagon/include/uapi/asm/sigcontext.h         |  2 +-
 arch/loongarch/vdso/Makefile                       |  2 +-
 arch/mips/Makefile                                 |  6 +-
 arch/parisc/boot/compressed/Makefile               |  2 +-
 arch/powerpc/boot/Makefile                         |  3 +-
 arch/s390/Makefile                                 |  3 +-
 arch/s390/purgatory/Makefile                       |  3 +-
 arch/x86/Makefile                                  |  6 +-
 arch/x86/boot/compressed/Makefile                  |  6 +-
 drivers/firmware/efi/libstub/Makefile              |  3 +-
 init/Kconfig                                       |  5 ++
 scripts/Makefile.vdsoinst                          |  7 ++-
 scripts/Makefile.warn                              |  5 --
 scripts/check-uapi.sh                              | 19 ++++---
 scripts/checksyscalls.sh                           | 11 +++-
 scripts/kconfig/lexer.l                            |  4 +-
 scripts/kconfig/lkc.h                              |  3 +-
 scripts/kconfig/parser.y                           | 15 ++---
 scripts/kconfig/tests/err_repeated_inc/Kconfig     |  3 +
 .../kconfig/tests/err_repeated_inc/Kconfig.inc1    |  4 ++
 .../kconfig/tests/err_repeated_inc/Kconfig.inc2    |  3 +
 .../kconfig/tests/err_repeated_inc/Kconfig.inc3    |  1 +
 scripts/kconfig/tests/err_repeated_inc/__init__.py | 10 ++++
 .../kconfig/tests/err_repeated_inc/expected_stderr |  2 +
 scripts/kconfig/util.c                             | 31 ++++++++++-
 tools/scripts/Makefile.include                     |  2 +
 usr/dummy-include/endian.h                         |  0
 usr/dummy-include/limits.h                         |  8 +++
 usr/dummy-include/netinet/if_ether.h               |  0
 usr/dummy-include/netinet/in.h                     |  0
 usr/dummy-include/stdbool.h                        |  7 ---
 usr/dummy-include/stddef.h                         | 13 +++++
 usr/dummy-include/stdint.h                         | 17 ++++++
 usr/dummy-include/stdlib.h                         |  7 ---
 usr/dummy-include/string.h                         | 12 ++++
 usr/dummy-include/sys/ioctl.h                      |  0
 usr/dummy-include/sys/socket.h                     | 12 ++++
 usr/dummy-include/sys/time.h                       |  3 +
 usr/dummy-include/sys/types.h                      |  0
 usr/dummy-include/time.h                           |  0
 usr/dummy-include/unistd.h                         |  0
 usr/include/Makefile                               | 65 ++++++++++++++--------
 47 files changed, 251 insertions(+), 117 deletions(-)
 create mode 100644 scripts/kconfig/tests/err_repeated_inc/Kconfig
 create mode 100644 scripts/kconfig/tests/err_repeated_inc/Kconfig.inc1
 create mode 100644 scripts/kconfig/tests/err_repeated_inc/Kconfig.inc2
 create mode 100644 scripts/kconfig/tests/err_repeated_inc/Kconfig.inc3
 create mode 100644 scripts/kconfig/tests/err_repeated_inc/__init__.py
 create mode 100644 scripts/kconfig/tests/err_repeated_inc/expected_stderr
 create mode 100644 usr/dummy-include/endian.h
 create mode 100644 usr/dummy-include/limits.h
 create mode 100644 usr/dummy-include/netinet/if_ether.h
 create mode 100644 usr/dummy-include/netinet/in.h
 delete mode 100644 usr/dummy-include/stdbool.h
 create mode 100644 usr/dummy-include/stddef.h
 create mode 100644 usr/dummy-include/stdint.h
 delete mode 100644 usr/dummy-include/stdlib.h
 create mode 100644 usr/dummy-include/string.h
 create mode 100644 usr/dummy-include/sys/ioctl.h
 create mode 100644 usr/dummy-include/sys/socket.h
 create mode 100644 usr/dummy-include/sys/time.h
 create mode 100644 usr/dummy-include/sys/types.h
 create mode 100644 usr/dummy-include/time.h
 create mode 100644 usr/dummy-include/unistd.h

-- 
Nicolas
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