FAILED: patch "[PATCH] purgatory: fix disabling debug info" failed to apply to 5.10-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x d83806c4c0cccc0d6d3c3581a11983a9c186a138
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2023041749-unburned-repacking-8dcc@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

d83806c4c0cc ("purgatory: fix disabling debug info")
56e0790c7f9e ("RISC-V: add infrastructure to allow different str* implementations")
736e30af583f ("RISC-V: Add purgatory")
6261586e0c91 ("RISC-V: Add kexec_file support")
8212f8986d31 ("kbuild: use more subdir- for visiting subdirectories while cleaning")
10c6ae274fe2 ("sh: remove meaningless archclean line")
b79bd0d5102b ("Merge tag 'riscv-for-linus-5.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From d83806c4c0cccc0d6d3c3581a11983a9c186a138 Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Sun, 26 Mar 2023 18:21:21 +0000
Subject: [PATCH] purgatory: fix disabling debug info

Since 32ef9e5054ec, -Wa,-gdwarf-2 is no longer used in KBUILD_AFLAGS.
Instead, it includes -g, the appropriate -gdwarf-* flag, and also the
-Wa versions of both of those if building with Clang and GNU as.  As a
result, debug info was being generated for the purgatory objects, even
though the intention was that it not be.

Fixes: 32ef9e5054ec ("Makefile.debug: re-enable debug info for .S files")
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Cc: stable@vger.kernel.org
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/arch/riscv/purgatory/Makefile b/arch/riscv/purgatory/Makefile
index d16bf715a586..5730797a6b40 100644
--- a/arch/riscv/purgatory/Makefile
+++ b/arch/riscv/purgatory/Makefile
@@ -84,12 +84,7 @@ CFLAGS_string.o			+= $(PURGATORY_CFLAGS)
 CFLAGS_REMOVE_ctype.o		+= $(PURGATORY_CFLAGS_REMOVE)
 CFLAGS_ctype.o			+= $(PURGATORY_CFLAGS)
 
-AFLAGS_REMOVE_entry.o		+= -Wa,-gdwarf-2
-AFLAGS_REMOVE_memcpy.o		+= -Wa,-gdwarf-2
-AFLAGS_REMOVE_memset.o		+= -Wa,-gdwarf-2
-AFLAGS_REMOVE_strcmp.o		+= -Wa,-gdwarf-2
-AFLAGS_REMOVE_strlen.o		+= -Wa,-gdwarf-2
-AFLAGS_REMOVE_strncmp.o		+= -Wa,-gdwarf-2
+asflags-remove-y		+= $(foreach x, -g -gdwarf-4 -gdwarf-5, $(x) -Wa,$(x))
 
 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
 		$(call if_changed,ld)
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index 17f09dc26381..82fec66d46d2 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -69,8 +69,7 @@ CFLAGS_sha256.o			+= $(PURGATORY_CFLAGS)
 CFLAGS_REMOVE_string.o		+= $(PURGATORY_CFLAGS_REMOVE)
 CFLAGS_string.o			+= $(PURGATORY_CFLAGS)
 
-AFLAGS_REMOVE_setup-x86_$(BITS).o	+= -Wa,-gdwarf-2
-AFLAGS_REMOVE_entry64.o			+= -Wa,-gdwarf-2
+asflags-remove-y		+= $(foreach x, -g -gdwarf-4 -gdwarf-5, $(x) -Wa,$(x))
 
 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
 		$(call if_changed,ld)