linux-kernel - [PATCH 04/11] s390: vmlinux.lds.S: Discard unnecessary sections

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Message-Id: <20240207-s390-lld-and-orphan-warn-v1-4-8a665b3346ab@kernel.org>
Date: Wed, 07 Feb 2024 17:14:56 -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 04/11] s390: vmlinux.lds.S: Discard unnecessary sections

When building with CONFIG_LD_ORPHAN_WARN after selecting
CONFIG_ARCH_HAS_LD_ORPHAN_WARN, there are some warnings around certain
ELF sections that are unnecessary for the kernel's purposes.

  s390-linux-ld: warning: orphan section `.dynstr' from `arch/s390/kernel/head64.o' being placed in section `.dynstr'
  s390-linux-ld: warning: orphan section `.dynamic' from `arch/s390/kernel/head64.o' being placed in section `.dynamic'
  s390-linux-ld: warning: orphan section `.hash' from `arch/s390/kernel/head64.o' being placed in section `.hash'
  s390-linux-ld: warning: orphan section `.gnu.hash' from `arch/s390/kernel/head64.o' being placed in section `.gnu.hash'

Add them to the discards to clear up the warnings, which matches other
architectures.

Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 arch/s390/kernel/vmlinux.lds.S | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 661a487a3048..35a6b3e6cc50 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -264,6 +264,7 @@ SECTIONS
 	DISCARDS
 	/DISCARD/ : {
 		*(.eh_frame)
-		*(.interp)
+		*(.interp .dynamic)
+		*(.dynstr .hash .gnu.hash)
 	}
 }

-- 
2.43.0