linux-kernel - Re: [PATCH 1/3] MIPS: boot/compressed: Disable abicalls

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Message-Id: <67D44R.5C6XHAZPCYVU3@crapouillou.net>
Date:   Tue, 14 Dec 2021 19:09:06 +0000
From:   Paul Cercueil <paul@...pouillou.net>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        list@...ndingux.net, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH 1/3] MIPS: boot/compressed: Disable abicalls

Hi Nathan,

Le mar., déc. 14 2021 at 11:06:57 -0700, Nathan Chancellor 
<nathan@...nel.org> a écrit :
> On Mon, Dec 13, 2021 at 10:49:12PM +0000, Paul Cercueil wrote:
>>  Avoid complaints from Clang/LLVM by building the decompress program 
>> with
>>  -mno-abicalls.
> 
> What is the message?

ld.lld: warning: lto.tmp: linking abicalls code with non-abicalls code 
arch/mips/kernel/head.o

Cheers,
-Paul

> 
>>  Signed-off-by: Paul Cercueil <paul@...pouillou.net>
>>  ---
>>   arch/mips/boot/compressed/Makefile | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>> 
>>  diff --git a/arch/mips/boot/compressed/Makefile 
>> b/arch/mips/boot/compressed/Makefile
>>  index f27cf31b4140..4c9ecfbb0ef4 100644
>>  --- a/arch/mips/boot/compressed/Makefile
>>  +++ b/arch/mips/boot/compressed/Makefile
>>  @@ -27,10 +27,10 @@ ifdef CONFIG_CPU_LOONGSON64
>>   KBUILD_CFLAGS := $(filter-out -march=loongson3a, $(KBUILD_CFLAGS)) 
>> -march=mips64r2
>>   endif
>> 
>>  -KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ -D__DISABLE_EXPORTS 
>> \
>>  +KBUILD_CFLAGS := $(KBUILD_CFLAGS) -mno-abicalls -D__KERNEL__ 
>> -D__DISABLE_EXPORTS \
>>   	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) 
>> -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
>> 
>>  -KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
>>  +KBUILD_AFLAGS := $(KBUILD_AFLAGS) -mno-abicalls -D__ASSEMBLY__ \
>>   	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
>>   	-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
>> 
>>  --
>>  2.33.0
>> 
>>