linux-kernel - [PATCH] x86/purgatory: strip debug info

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Message-Id: <1596097609-14118-1-git-send-email-kernelfans@gmail.com>
Date:   Thu, 30 Jul 2020 16:26:49 +0800
From:   Pingfan Liu <kernelfans@...il.com>
To:     x86@...nel.org
Cc:     Pingfan Liu <kernelfans@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        Steve Wahl <steve.wahl@....com>, linux-kernel@...r.kernel.org
Subject: [PATCH] x86/purgatory: strip debug info

It is useless to keep debug info in purgatory. And discarding them saves
about 200K space.

Original:
  259080  kexec-purgatory.o
Stripped:
   29152  kexec-purgatory.o

Signed-off-by: Pingfan Liu <kernelfans@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Hans de Goede <hdegoede@...hat.com>
Cc: Nick Desaulniers <ndesaulniers@...gle.com>
Cc: Arvind Sankar <nivedita@...m.mit.edu>
Cc: Steve Wahl <steve.wahl@....com>
Cc: linux-kernel@...r.kernel.org
To: x86@...nel.org
---
 arch/x86/purgatory/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index 088bd76..4340ae6 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -16,7 +16,7 @@ CFLAGS_sha256.o := -D__DISABLE_EXPORTS
 
 # When linking purgatory.ro with -r unresolved symbols are not checked,
 # also link a purgatory.chk binary without -r to check for unresolved symbols.
-PURGATORY_LDFLAGS := -e purgatory_start -nostdlib -z nodefaultlib
+PURGATORY_LDFLAGS := -e purgatory_start -nostdlib -z nodefaultlib -S
 LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS)
 LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS)
 targets += purgatory.ro purgatory.chk
-- 
2.7.5