+ scripts-decode_stacktracesh-code-preserve-alignment.patch added to mm-new branch

+ scripts-decode_stacktracesh-code-preserve-alignment.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: scripts/decode_stacktrace.sh: code: preserve alignment
has been added to the -mm mm-new branch.  Its filename is
     scripts-decode_stacktracesh-code-preserve-alignment.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scripts-decode_stacktracesh-code-preserve-alignment.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
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fixup patches in mm-new.

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: "Matthieu Baerts (NGI0)" <matttbe@kernel.org>
Subject: scripts/decode_stacktrace.sh: code: preserve alignment
Date: Mon, 08 Sep 2025 17:41:59 +0200

With lines having a code to decode, the alignment was not preserved for
the first line.

With this sample ...

  [   52.238089][   T55] RIP: 0010:__ip_queue_xmit+0x127c/0x1820
  [   52.238401][   T55] Code: c1 83 e0 07 48 c1 e9 03 83 c0 03 (...)

... the script was producing the following output:

  [   52.238089][   T55] RIP: 0010:__ip_queue_xmit (...)
  [ 52.238401][ T55] Code: c1 83 e0 07 48 c1 e9 03 83 c0 03 (...)

That's because scripts/decodecode doesn't preserve the alignment.  No need
to modify it, it is enough to give only the "Code: (...)" part to this
script, and print the prefix without modifications.

With the same sample, we now have:

  [   52.238089][   T55] RIP: 0010:__ip_queue_xmit (...)
  [   52.238401][   T55] Code: c1 83 e0 07 48 c1 e9 03 83 c0 03 (...)

Link: https://lkml.kernel.org/r/20250908-decode_strace_indent-v1-3-28e5e4758080@kernel.org
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Tested-by: Carlos Llamas <cmllamas@google.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Elliot Berman <quic_eberman@quicinc.com>
Cc: Luca Ceresoli <luca.ceresoli@bootlin.com>
Cc: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 scripts/decode_stacktrace.sh |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/scripts/decode_stacktrace.sh~scripts-decode_stacktracesh-code-preserve-alignment
+++ a/scripts/decode_stacktrace.sh
@@ -242,8 +242,10 @@ debuginfod_get_vmlinux() {
 
 decode_code() {
 	local scripts=`dirname "${BASH_SOURCE[0]}"`
+	local lim="Code: "
 
-	echo "$1" | $scripts/decodecode
+	echo -n "${1%%${lim}*}"
+	echo "${lim}${1##*${lim}}" | $scripts/decodecode
 }
 
 handle_line() {
_

Patches currently in -mm which might be from matttbe@kernel.org are

scripts-decode_stacktracesh-symbol-avoid-trailing-whitespaces.patch
scripts-decode_stacktracesh-symbol-preserve-alignment.patch
scripts-decode_stacktracesh-code-preserve-alignment.patch