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Issue 898252 link

Starred by 1 user
Status: Verified
Owner:
█ ndesaulniers@google.com
Last visit > 30 days ago
Closed: Nov 27
Cc:
█ srhines@google.com
█ peter.sm...@arm.com
█ jyknight@google.com
█ ndesaulniers@google.com
█ ghackmann@google.com
manojgupta@chromium.org
█ kristof....@arm.com
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 3
Type: Bug
Build-Toolchain



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binutils support for `.arch_extension lse` assembler directive

Project Member Reported by ndesaulniers@google.com, Oct 23 
Follow up to https://bugs.chromium.org/p/chromium/issues/detail?id=865188.

We get a kernel build failure using older versions of binutils that don't understand the `.arch_extension lse` assembler directive.  This prevents the use of CONFIG_ARM64_LSE_ATOMICS.

Comment 1 by mka@chromium.org, Oct 23

Components: Tools>ChromeOS-Toolchain
Owner: cmt...@chromium.org
Reassigning to the toolchain team, feel free to reassign again if there is a more suitable owner.

Comment 2 by ndesaulniers@google.com, Oct 29 

Sorry, I was wrong.  It looks like https://github.com/ClangBuiltLinux/linux/commit/0f0e8de334c54c38818a4a5390a39aa09deff5bf needs to be backported to stable. I will send it.

Comment 3 by ndesaulniers@google.com, Oct 29 

Submitted to stable.
https://www.spinics.net/lists/stable/msg264409.html: [PATCH] kbuild: set no-integrated-as before incl. arch Makefile
https://www.spinics.net/lists/stable/msg264410.html: [PATCH] arm64: lse: remove -fcall-used-x0 flag

Comment 4 by ndesaulniers@google.com, Oct 29

Owner: ndesaulniers@google.com

Comment 5 by ndesaulniers@google.com, Nov 27

Status: Verified (was: Untriaged)
first patch has been backported to at least 4.14: https://lkml.org/lkml/2018/10/25/581

second patch has been backported + landed back to 4.9: https://www.spinics.net/lists/stable/msg266842.html
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