Stable Archive on lore.kernel.org
 help / color / Atom feed
From: Nathan Chancellor <natechancellor@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Sasha Levin <sashal@kernel.org>
Cc: stable@vger.kernel.org, Alistair Strachan <astrachan@google.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Nick Desaulniers <ndesaulniers@google.com>
Subject: LLD patches for x86_64
Date: Wed, 10 Apr 2019 20:51:43 -0700
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,
Nathan

[-- Attachment #2: lld-4.4.mbox --]
[-- Type: application/mbox, Size: 12465 bytes --]

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

[-- Attachment #4: lld-4.14.mbox --]
[-- Type: application/mbox, Size: 8839 bytes --]

[-- Attachment #5: lld-4.19.mbox --]
[-- Type: application/mbox, Size: 4214 bytes --]

             reply index

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 ` 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

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190411035143.GA14196@archlinux-i9 \
    --to=natechancellor@gmail.com \
    --cc=astrachan@google.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=ndesaulniers@google.com \
    --cc=samitolvanen@google.com \
    --cc=sashal@kernel.org \
    --cc=stable@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Stable Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ https://lore.kernel.org/stable \
		stable@vger.kernel.org stable@archiver.kernel.org
	public-inbox-index stable

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.stable


AGPL code for this site: git clone https://public-inbox.org/ public-inbox