linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Heiko Carstens <hca@linux.ibm.com>
To: Vasily Gorbik <gor@linux.ibm.com>,
	Alexander Gordeev <agordeev@linux.ibm.com>,
	Jonas Paulsson <paulsson@linux.vnet.ibm.com>,
	Ulrich Weigand <ulrich.weigand@de.ibm.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Alexander Egorenkov <egorenar@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>,
	Andreas Krebbel <krebbel@linux.ibm.com>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [PATCH 7/8] s390/boot: do not emit debug info for assembly with llvm's IAS
Date: Wed, 11 May 2022 14:05:31 +0200	[thread overview]
Message-ID: <20220511120532.2228616-8-hca@linux.ibm.com> (raw)
In-Reply-To: <20220511120532.2228616-1-hca@linux.ibm.com>

Commit ee6d777d3e93 ("s390/decompressor: support extra debug flags")
added extra debug flags, in particular debug info is created,
depending on config options.

With llvm's IAS this causes this compile warning:

arch/s390/boot/head.S:38:1: warning: DWARF2 only supports one section per compilation unit
.section ".head.text","ax"
^

This is a known problem and was addressed with a commit b8a9092330da
("Kbuild: do not emit debug info for assembly with LLVM_IAS=1").
Just do the same for s390 to get rid of this warning.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index c59efc83f020..d73611b35164 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -20,7 +20,9 @@ LDFLAGS_vmlinux	:= -pie
 endif
 aflags_dwarf	:= -Wa,-gdwarf-2
 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
+ifndef CONFIG_AS_IS_LLVM
 KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
+endif
 KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack
 KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
 KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain
-- 
2.32.0


  parent reply	other threads:[~2022-05-11 12:08 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-11 12:05 [PATCH 0/8] s390: allow to build with llvm's integrated assembler Heiko Carstens
2022-05-11 12:05 ` [PATCH 1/8] s390/alternatives: provide identical sized orginal/alternative sequences Heiko Carstens
2022-05-13  9:17   ` Vasily Gorbik
2022-05-11 12:05 ` [PATCH 2/8] s390/alternatives: remove padding generation code Heiko Carstens
2022-05-11 17:02   ` Heiko Carstens
2022-05-13  9:18   ` Vasily Gorbik
2022-05-11 12:05 ` [PATCH 3/8] s390/entry: shorten OUTSIDE macro Heiko Carstens
2022-05-12 15:59   ` kernel test robot
2022-05-12 16:20   ` kernel test robot
2022-05-12 17:21   ` Heiko Carstens
2022-05-12 18:00     ` Nick Desaulniers
2022-05-12 19:15       ` Heiko Carstens
2022-05-12 19:25         ` Nick Desaulniers
2022-05-13 12:29           ` Heiko Carstens
2022-05-11 12:05 ` [PATCH 4/8] s390/entry: workaround llvm's IAS limitations Heiko Carstens
2022-05-11 17:30   ` Nathan Chancellor
2022-05-12 17:24     ` Heiko Carstens
2022-05-12 19:06       ` Nathan Chancellor
2022-05-12 19:16         ` Heiko Carstens
2022-05-16  9:07       ` Alexander Gordeev
2022-05-16 10:19         ` Heiko Carstens
2022-05-16 10:42           ` Jonas Paulsson
2022-05-16 11:11           ` Alexander Gordeev
2022-05-16 14:05             ` Heiko Carstens
2022-05-11 12:05 ` [PATCH 5/8] s390/purgatory: " Heiko Carstens
2022-05-11 19:54   ` Nick Desaulniers
2022-05-12 17:26     ` Heiko Carstens
2022-05-12 17:25   ` Heiko Carstens
2022-05-11 12:05 ` [PATCH 6/8] s390/boot: workaround llvm IAS bug Heiko Carstens
2022-05-11 19:50   ` Nick Desaulniers
2022-05-11 12:05 ` Heiko Carstens [this message]
2022-05-11 19:40   ` [PATCH 7/8] s390/boot: do not emit debug info for assembly with llvm's IAS Nick Desaulniers
2022-05-12 17:30     ` Heiko Carstens
2022-05-11 12:05 ` [PATCH 8/8] scripts/min-tool-version.sh: raise minimum clang version to 14.0.0 for s390 Heiko Carstens
2022-05-11 19:27   ` Nick Desaulniers
2022-05-11 19:56     ` Nick Desaulniers
2022-05-12 19:06       ` Heiko Carstens
2022-05-11 19:48 ` [PATCH 0/8] s390: allow to build with llvm's integrated assembler Nick Desaulniers
2022-05-12 19:04   ` Heiko Carstens
2022-05-11 20:52 ` Nathan Chancellor
2022-05-12 19:03   ` Heiko Carstens

Reply instructions:

You may reply publicly 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=20220511120532.2228616-8-hca@linux.ibm.com \
    --to=hca@linux.ibm.com \
    --cc=agordeev@linux.ibm.com \
    --cc=egorenar@linux.ibm.com \
    --cc=gor@linux.ibm.com \
    --cc=krebbel@linux.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-s390@vger.kernel.org \
    --cc=masahiroy@kernel.org \
    --cc=natechancellor@gmail.com \
    --cc=ndesaulniers@google.com \
    --cc=paulsson@linux.vnet.ibm.com \
    --cc=svens@linux.ibm.com \
    --cc=ulrich.weigand@de.ibm.com \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).