[PATCH v2 0/2] gcov fixes for clang-11

[Nick Desaulniers]

LLVM changed the expected function signatures for llvm_gcda_start_file()
and llvm_gcda_emit_function() in the clang-11 release. Users of clang-11
or newer may have noticed their kernels failing to boot due to a panic
when enabling CONFIG_GCOV_KERNEL=y +CONFIG_GCOV_PROFILE_ALL=y.  Fix up
the function signatures so calling these functions doesn't panic the
kernel.

The first patch should allow us to backport it to stable; the second
drops support for older toolchains.

Link: https://reviews.llvm.org/rGcdd683b516d147925212724b09ec6fb792a40041
Link: https://reviews.llvm.org/rG13a633b438b6500ecad9e4f936ebadf3411d0f44

Nick Desaulniers (2):
  gcov: fix clang-11+ support
  gcov: clang: drop support for clang-10 and older

 kernel/gcov/Kconfig |  1 +
 kernel/gcov/clang.c | 32 ++++++++------------------------
 2 files changed, 9 insertions(+), 24 deletions(-)


base-commit: f78d76e72a4671ea52d12752d92077788b4f5d50
-- 
2.31.0.rc2.261.g7f71774620-goog