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DISCUSSION Alexey Gladkov 1 participant 1 message Oct 15, 2025 Stable branch

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Subject: Re: Patch "s390: vmlinux.lds.S: Reorder sections" has been added to
the 6.17-stable tree
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In-Reply-To: <[email protected]>

Quoted 7 lines · Sasha Levin

This is a note to let you know that I've just added the patch titled

s390: vmlinux.lds.S: Reorder sections

to the 6.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

Quoted 7 lines

The filename of the patch is:
s390-vmlinux.lds.s-reorder-sections.patch
and it can be found in the queue-6.17 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

If you take this commit, then I think this commit is also needed:

https://lore.kernel.org/all/20251008-kbuild-fix-modinfo-regressions-v1-3-9fc776c5887c@kernel.org/

Quoted 64 lines

commit 106cf24aac7413e5fb6aa632707ff81451a202c1

Author: Alexey Gladkov <[email protected]>
Date:   Thu Sep 18 10:05:45 2025 +0200

s390: vmlinux.lds.S: Reorder sections

[ Upstream commit 8d18ef04f940a8d336fe7915b5ea419c3eb0c0a6 ]

In the upcoming changes, the ELF_DETAILS macro will be extended with the ".modinfo" section, which will cause an error:

>> s390x-linux-ld: .tmp_vmlinux1: warning: allocated section .modinfo' not in segment >> s390x-linux-ld: .tmp_vmlinux2: warning: allocated section .modinfo' not in segment >> s390x-linux-ld: vmlinux.unstripped: warning: allocated section `.modinfo' not in segment

This happens because the .vmlinux.info use :NONE to override the default segment and tell the linker to not put the section in any segment at all.

To avoid this, we need to change the sections order that will be placed in the default segment.

Stable-dep-of: 9338d660b79a ("s390/vmlinux.lds.S: Move .vmlinux.info to end of allocatable sections")

arch/s390/kernel/vmlinux.lds.S +5 -5
index 1c606dfa595d8..feecf1a6ddb44 100644
@@ -209,6 +209,11 @@ SECTIONS
 	. = ALIGN(PAGE_SIZE);
 	_end = . ;
 
+	/* Debugging sections.	*/
+	STABS_DEBUG
+	DWARF_DEBUG
+	ELF_DETAILS
+
 	/*
 	 * uncompressed image info used by the decompressor
 	 * it should match struct vmlinux_info
@@ -239,11 +244,6 @@ SECTIONS
 #endif
 	} :NONE
 
-	/* Debugging sections.	*/
-	STABS_DEBUG
-	DWARF_DEBUG
-	ELF_DETAILS
-
 	/*
 	 * Make sure that the .got.plt is either completely empty or it
 	 * contains only the three reserved double words.
Signature · 1 line
Rgrds, legion