Re: [PATCH 0/7] LLVM: make x86_64 kernel build with clang.

[Dmitry Vyukov]

On Fri, Mar 17, 2017 at 1:15 AM, Michael Davidson <md@xxxxxxxxxx> wrote:
> This patch set is sufficient to get the x86_64 kernel to build
> and boot correctly with clang-3.8 or greater.
>
> The resulting build still has about 300 warnings, very few of
> which appear to be significant. Most of them should be fixable
> with some minor code refactoring although a few of them, such
> as the complaints about implict conversions between enumerated
> types may be candidates for just being disabled.

Thanks, Michael!
This will help us a lot with KMSAN (uninit use detector) and code coverage.


> Michael Davidson (7):
>   Makefile, LLVM: add -no-integrated-as to KBUILD_[AC]FLAGS
>   Makefile, x86, LLVM: disable unsupported optimization flags
>   x86, LLVM: suppress clang warnings about unaligned accesses
>   x86, boot, LLVM: #undef memcpy etc in string.c
>   x86, boot, LLVM: Use regparm=0 for memcpy and memset
>   md/raid10, LLVM: get rid of variable length array
>   crypto, x86, LLVM: aesni - fix token pasting
>
>  Makefile                                |  4 ++++
>  arch/x86/Makefile                       |  7 +++++++
>  arch/x86/boot/copy.S                    | 15 +++++++++++++--
>  arch/x86/boot/string.c                  |  9 +++++++++
>  arch/x86/boot/string.h                  | 13 +++++++++++++
>  arch/x86/crypto/aes_ctrby8_avx-x86_64.S |  7 ++-----
>  drivers/md/raid10.c                     |  9 ++++-----
>  7 files changed, 52 insertions(+), 12 deletions(-)
>
> --
> 2.12.0.367.g23dc2f6d3c-goog
>