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Date: Wed, 9 Dec 2020 10:59:22 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Sami Tolvanen <samitolvanen@...gle.com>
Cc: Masahiro Yamada <masahiroy@...nel.org>, Steven Rostedt <rostedt@...dmis.org>, 
	Will Deacon <will@...nel.org>, Josh Poimboeuf <jpoimboe@...hat.com>, 
	Peter Zijlstra <peterz@...radead.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	"Paul E. McKenney" <paulmck@...nel.org>, Kees Cook <keescook@...omium.org>, 
	Nick Desaulniers <ndesaulniers@...gle.com>, 
	clang-built-linux <clang-built-linux@...glegroups.com>, 
	Kernel Hardening <kernel-hardening@...ts.openwall.com>, 
	linux-arch <linux-arch@...r.kernel.org>, 
	Linux ARM <linux-arm-kernel@...ts.infradead.org>, 
	Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, linux-pci <linux-pci@...r.kernel.org>
Subject: Re: [PATCH v8 00/16] Add support for Clang LTO

On Tue, Dec 8, 2020 at 10:02 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> On Tue, Dec 8, 2020 at 9:59 PM Arnd Bergmann <arnd@...nel.org> wrote:
> >
> > Attaching the config for "ld.lld: error: Never resolved function from
> >   blockaddress (Producer: 'LLVM12.0.0' Reader: 'LLVM 12.0.0')"

After rerunning this one with thinlto, it disappeared.

> And here is a new one: "ld.lld: error: assignment to symbol
> init_pg_end does not converge"

this one is still there.

and I reproduced another one with thinlto now:

mm/highmem.o: no symbols
lib/nmi_backtrace.o: no symbols
lib/bitrev.o: no symbols
mm/highmem.o: no symbols
lib/nmi_backtrace.o: no symbols
lib/bitrev.o: no symbols
mm/highmem.o: no symbols
lib/nmi_backtrace.o: no symbols
lib/bitrev.o: no symbols
ERROR: modpost: "memset" [drivers/most/most_cdev.ko] undefined!
ERROR: modpost: "__stack_chk_guard" [drivers/most/most_cdev.ko] undefined!
ERROR: modpost: "__stack_chk_fail" [drivers/most/most_cdev.ko] undefined!
ERROR: modpost: "memset" [drivers/most/most_usb.ko] undefined!
ERROR: modpost: "memmove" [drivers/most/most_usb.ko] undefined!
ERROR: modpost: "__stack_chk_guard" [drivers/most/most_usb.ko] undefined!
ERROR: modpost: "__stack_chk_fail" [drivers/most/most_usb.ko] undefined!
ERROR: modpost: "__stack_chk_guard" [drivers/most/most_core.ko] undefined!
ERROR: modpost: "__stack_chk_fail" [drivers/most/most_core.ko] undefined!
ERROR: modpost: "memset" [drivers/ntb/ntb_transport.ko] undefined!
ERROR: modpost: "memcpy" [drivers/ntb/ntb_transport.ko] undefined!
ERROR: modpost: "__stack_chk_guard" [drivers/ntb/ntb_transport.ko] undefined!
ERROR: modpost: "__stack_chk_fail" [drivers/ntb/ntb_transport.ko] undefined!
ERROR: modpost: "__stack_chk_guard" [drivers/ntb/test/ntb_perf.ko] undefined!
ERROR: modpost: "__stack_chk_fail" [drivers/ntb/test/ntb_perf.ko] undefined!
...

    Arnd

Download attachment "0x15EFB1B4_defconfig" of type "application/octet-stream" (177562 bytes)

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