Merge tag 'kbuild-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild...

Pull Kbuild/Kconfig updates from Nicolas Schier:
 "Kbuild:
   - reject unexpected values for LLVM=
   - uapi: remove usage of toolchain headers
   - switch from '-fms-extensions' to '-fms-anonymous-structs' when
     available (currently: clang >= 23.0.0)
   - reduce the number of compiler-generated suffixes for clang thin-lto
     build
   - reduce output spam ("GEN Makefile") when building out of tree
   - improve portability for testing headers
   - also test UAPI headers against C++ compilers
   - drop build ID architecture allow-list in vdso_install
   - only run checksyscalls when necessary
   - update the debug information notes in reproducible-builds.rst
   - expand inlining hints with -fdiagnostics-show-inlining-chain

  Kconfig:
   - forbid multiple entries with the same symbol in a choice
   - error out on duplicated kconfig inclusion"

* tag 'kbuild-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux: (35 commits)
  kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain
  kconfig: forbid multiple entries with the same symbol in a choice
  Documentation: kbuild: Update the debug information notes in reproducible-builds.rst
  checksyscalls: move instance functionality into generic code
  checksyscalls: only run when necessary
  checksyscalls: fail on all intermediate errors
  checksyscalls: move path to reference table to a variable
  kbuild: vdso_install: drop build ID architecture allow-list
  kbuild: vdso_install: gracefully handle images without build ID
  kbuild: vdso_install: hide readelf warnings
  kbuild: vdso_install: split out the readelf invocation
  kbuild: uapi: also test UAPI headers against C++ compilers
  kbuild: uapi: provide a C++ compatible dummy definition of NULL
  kbuild: uapi: handle UML in architecture-specific exclusion lists
  kbuild: uapi: move all include path flags together
  kbuild: uapi: move some compiler arguments out of the command definition
  check-uapi: use dummy libc includes
  check-uapi: honor ${CROSS_COMPILE} setting
  check-uapi: link into shared objects
  kbuild: reduce output spam when building out of tree
  ...

diff --cc Makefile
Simple merge

diff --cc arch/loongarch/vdso/Makefile
index 294c16b9517fd3705d37410adb78df9ff2a26673,904ef4a0d826626265a520d7bc7916a9675b5148..42aa96249828c9eda4559060efe878da9d51930c
--- 1/arch/loongarch/vdso/Makefile
--- 2/arch/loongarch/vdso/Makefile
+++ b/arch/loongarch/vdso/Makefile
@@@ -24,9 -24,9 +24,9 @@@ endi
  cflags-vdso := $(ccflags-vdso) \
        -isystem $(shell $(CC) -print-file-name=include) \
        $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
-       -std=gnu11 -fms-extensions -O2 -g -fno-strict-aliasing -fno-common -fno-builtin \
+       $(CC_FLAGS_DIALECT) -O2 -g -fno-strict-aliasing -fno-common -fno-builtin \
        -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
 -      $(call cc-option, -fno-asynchronous-unwind-tables) \
 +      $(call cc-option, -fasynchronous-unwind-tables) \
        $(call cc-option, -fno-stack-protector)
  aflags-vdso := $(ccflags-vdso) \
        -D__ASSEMBLY__ -Wa,-gdwarf-2

diff --cc arch/x86/boot/compressed/Makefile
Simple merge

diff --cc init/Kconfig
Simple merge