linux-kernel - [PATCH 09/11] s390/boot: vmlinux.lds.S: Handle commonly discarded sections

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Message-Id: <20240207-s390-lld-and-orphan-warn-v1-9-8a665b3346ab@kernel.org>
Date: Wed, 07 Feb 2024 17:15:01 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: hca@...ux.ibm.com, gor@...ux.ibm.com, agordeev@...ux.ibm.com
Cc: borntraeger@...ux.ibm.com, svens@...ux.ibm.com, maskray@...gle.com, 
 ndesaulniers@...gle.com, linux-s390@...r.kernel.org, 
 linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, patches@...ts.linux.dev, 
 Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH 09/11] s390/boot: vmlinux.lds.S: Handle commonly discarded
 sections

When building with CONFIG_LD_ORPHAN_WARN after selecting
CONFIG_ARCH_HAS_LD_ORPHAN_WARN, there are several series of warnings
from the various discardable sections that the kernel adds for build
purposes that are not needed at runtime:

  s390-linux-ld: warning: orphan section `.export_symbol' from `arch/s390/boot/decompressor.o' being placed in section `.export_symbol'
  s390-linux-ld: warning: orphan section `.discard.addressable' from `arch/s390/boot/decompressor.o' being placed in section `.discard.addressable'
  s390-linux-ld: warning: orphan section `.modinfo' from `arch/s390/boot/decompressor.o' being placed in section `.modinfo'

include/asm-generic/vmlinux.lds.h has a macro for easily discarding
these sections across the kernel named COMMON_DISCARDS, use it to clear
up the warnings.

Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 arch/s390/boot/vmlinux.lds.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/boot/vmlinux.lds.S b/arch/s390/boot/vmlinux.lds.S
index 2bef450e84e9..806bca35e3f1 100644
--- a/arch/s390/boot/vmlinux.lds.S
+++ b/arch/s390/boot/vmlinux.lds.S
@@ -147,6 +147,7 @@ SECTIONS
 
 	/* Sections to be discarded */
 	/DISCARD/ : {
+		COMMON_DISCARDS
 		*(.eh_frame)
 		*(__ex_table)
 		*(*__ksymtab*)

-- 
2.43.0