On Thu, Apr 11, 2019 at 09:58:04AM -0400, Sasha Levin wrote:
On Wed, Apr 10, 2019 at 08:51:43PM -0700, Nathan Chancellor wrote:
Hi Greg and Sasha,
Please apply the following mbox files to their respective trees. They contain upstream patches that allow a tip of tree LLD to link an x86 kernel image as well as a patch to avoid using $(LD) to check for the location of binutils, which won't always be accurate when linking with LLD. This was tested with both the upstream defconfig and Android's x86_64_cuttlefish_defconfig in their respective trees (building/linking with both Clang/LLD and GCC/ld.bfd then booting in QEMU).
For 5.0, a simple cherry-pick of commit ad15006cc784 ("kbuild: clang: choose GCC_TOOLCHAIN_DIR not on LD") will do.
Greg, the merge into kernel/common will result in two conflicts:
Makefile: Make the diff match upstream commit ad15006cc784 ("kbuild: clang: choose GCC_TOOLCHAIN_DIR not on LD")
arch/x86/entry/vdso/Makefile: Take the right hand side, effectively replacing common commit 35b779802c2e ("x86: vdso: Fix leaky vdso linker with CC=clang.") with the proper upstream commit 379d98ddf413 ("x86: vdso: Use $LD instead of $CC to link")
Nathan,
I might be missing something, but ad15006cc784 does not touch arch/x86/entry/vdso/Makefile nor does it generate any conflicts.
Hi Sasha,
You are correct. The conflict notes were for when Greg does the LTS merge into the Android common kernel, which has an out of tree patch that will cause a conflict with ad15006cc784. The conflict in the x86 vDSO Makefile comes from the other patches in the series. None of that matters for upstream.
Thanks, Nathan
-- Thanks, Sasha