Patch "Makefile.debug: re-enable debug info for .S files" has been added to the 5.15-stable tree

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

    Makefile.debug: re-enable debug info for .S files

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     makefile.debug-re-enable-debug-info-for-.s-files.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From foo@baz Thu Oct 27 12:31:19 PM CEST 2022
From: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Date: Mon, 24 Oct 2022 13:34:14 -0700
Subject: Makefile.debug: re-enable debug info for .S files

From: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>

This is _not_ an upstream commit and just for 5.15.y only. It is based
on commit 32ef9e5054ec0321b9336058c58ec749e9c6b0fe upstream.

Alexey reported that the fraction of unknown filename instances in
kallsyms grew from ~0.3% to ~10% recently; Bill and Greg tracked it down
to assembler defined symbols, which regressed as a result of:

commit b8a9092330da ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")

In that commit, I allude to restoring debug info for assembler defined
symbols in a follow up patch, but it seems I forgot to do so in

commit a66049e2cf0e ("Kbuild: make DWARF version a choice")

Fixes: b8a9092330da ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 Makefile |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/Makefile
+++ b/Makefile
@@ -870,7 +870,9 @@ else
 DEBUG_CFLAGS	+= -g
 endif
 
-ifndef CONFIG_AS_IS_LLVM
+ifdef CONFIG_AS_IS_LLVM
+KBUILD_AFLAGS	+= -g
+else
 KBUILD_AFLAGS	+= -Wa,-gdwarf-2
 endif
 


Patches currently in stable-queue which might be from ndesaulniers@xxxxxxxxxx are

queue-5.15/makefile.debug-re-enable-debug-info-for-.s-files.patch
queue-5.15/x86-kconfig-drop-check-for-mabi-ms-for-config_efi_stub.patch



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