This is a note to let you know that I've just added the patch titled
powerpc/32s: Fix assembler warning about r0
to the 4.19-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:
powerpc-32s-fix-assembler-warning-about-r0.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b51ba4fe2e134b631f9c8f45423707aab71449b5 Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Date: Thu, 6 Aug 2020 06:01:42 +0000
Subject: powerpc/32s: Fix assembler warning about r0
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
commit b51ba4fe2e134b631f9c8f45423707aab71449b5 upstream.
The assembler says:
arch/powerpc/kernel/head_32.S:1095: Warning: invalid register expression
It's objecting to the use of r0 as the RA argument. That's because
when RA = 0 the literal value 0 is used, rather than the content of
r0, making the use of r0 in the source potentially confusing.
Fix it to use a literal 0, the generated code is identical.
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/2b69ac8e1cddff6f808fc7415907179eab4aae9e.1596693679.git.christophe.leroy@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kernel/head_32.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -987,7 +987,7 @@ start_here:
*/
lis r5, abatron_pteptrs@h
ori r5, r5, abatron_pteptrs@l
- stw r5, 0xf0(r0) /* This much match your Abatron config */
+ stw r5, 0xf0(0) /* This much match your Abatron config */
lis r6, swapper_pg_dir@h
ori r6, r6, swapper_pg_dir@l
tophys(r5, r5)
Patches currently in stable-queue which might be from christophe.leroy@xxxxxxxxxx are
queue-4.19/powerpc-32-include-.branch_lt-in-data-section.patch
queue-4.19/powerpc-32s-fix-assembler-warning-about-r0.patch
