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From: Nathan Chancellor <>
To: Greg Kroah-Hartman <>,
	Sasha Levin <>
Cc:, Alistair Strachan <>,
	Sami Tolvanen <>,
	Nick Desaulniers <>
Subject: LLD patches for x86_64
Date: Wed, 10 Apr 2019 20:51:43 -0700	[thread overview]
Message-ID: <20190411035143.GA14196@archlinux-i9> (raw)

[-- Attachment #1: Type: text/plain, Size: 1371 bytes --]

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")

Also, while you are at it, would you mind picking up upstream commit
5f074f3e192f ("lib/string.c: implement a basic bcmp")? It is cc'd for
stable but it's worth mentioning now so we can stop carrying it out of
tree :)

Let me know if there are any issues, comments, or concerns,

[-- Attachment #2: lld-4.4.mbox --]
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[-- Attachment #3: lld-4.9.mbox --]
[-- Type: application/mbox, Size: 8713 bytes --]

[-- Attachment #4: lld-4.14.mbox --]
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[-- Attachment #5: lld-4.19.mbox --]
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             reply	other threads:[~2019-04-11  3:51 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11  3:51 Nathan Chancellor [this message]
2019-04-11 13:58 ` LLD patches for x86_64 Sasha Levin
2019-04-11 14:21   ` Nathan Chancellor
2019-04-11 14:25   ` Nathan Chancellor
2019-04-11 14:39     ` Sasha Levin
2019-04-17 18:24 ` Greg Kroah-Hartman
2019-04-17 18:37   ` Nathan Chancellor

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