[PATCH v2 0/7] set clang minimum version to 10.0.1

[Nick Desaulniers]

Adds a compile time #error to compiler-clang.h setting the effective
minimum supported version to clang 10.0.1. A separate patch has already
been picked up into the Documentation/ tree also confirming the version.

Next are a series of reverts. One for 32b arm is a partial revert.

Then Marco suggested fixes to KASAN docs.

Finally, improve the warning for GCC too as per Kees.

Patches after 001 are new for v2.

Marco Elver (1):
  kasan: Remove mentions of unsupported Clang versions

Nick Desaulniers (6):
  compiler-clang: add build check for clang 10.0.1
  Revert "kbuild: disable clang's default use of -fmerge-all-constants"
  Revert "arm64: bti: Require clang >= 10.0.1 for in-kernel BTI support"
  Revert "arm64: vdso: Fix compilation with clang older than 8"
  Partial revert "ARM: 8905/1: Emit __gnu_mcount_nc when using Clang
    10.0.0 or newer"
  compiler-gcc: improve version warning

 Documentation/dev-tools/kasan.rst | 4 ++--
 Makefile                          | 9 ---------
 arch/arm/Kconfig                  | 2 +-
 arch/arm64/Kconfig                | 2 --
 arch/arm64/kernel/vdso/Makefile   | 7 -------
 include/linux/compiler-clang.h    | 8 ++++++++
 include/linux/compiler-gcc.h      | 2 +-
 lib/Kconfig.kasan                 | 9 ++++-----
 8 files changed, 16 insertions(+), 27 deletions(-)

-- 
2.28.0.402.g5ffc5be6b7-goog