linux-kernel - Re: Linux 5.11-rc1

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Date:   Mon, 28 Dec 2020 16:25:59 +0100
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Linux 5.11-rc1

[ Please CC me I am not subscribed to LKML and linux-kbuild ML ]

Hi Linus,

I also tested with LLVM toolchain v11.0.1-rc2 together with passing
LLVM=1 and LLVM_IAS=1 to my make line.

I had one ERROR:

error: too few operands for instruction in arch/x86/kvm/svm/sev.c

The issue was reported in ClangBuiltLinux (CBL) issue #1216.
A fix was offered in [2] and fixes the issue on the kernel-side.

I had one WARNING:

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool:
eb_relocate_parse_slow()+0x3d0: stack state mismatch: cfa1=7+120
cfa2=-1+0
drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool:
eb_copy_relocations()+0x229: stack state mismatch: cfa1=7+120
cfa2=-1+0

Looks like a similar issue was reported as
"drivers/gpu/drm/i915/gem/i915_gem_execbuffer: objtool warning on
stack state mismatch" in [3].
I CCed Josh in the CBL issue #1192.

Thanks.

Regards,
- Sedat -

[1] https://github.com/ClangBuiltLinux/linux/issues/1216
[2] https://lore.kernel.org/kvm/20201219063711.3526947-1-natechancellor@gmail.com/
[3] https://github.com/ClangBuiltLinux/linux/issues/1192