linux-kernel - [PATCH] kernel/modsign_certificate.S: use real contents instead of macro GLOBAL()

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Date:	Thu, 24 Oct 2013 13:31:29 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Joern Rennecke <joern.rennecke@...ecosm.com>,
	James Hogan <james.hogan@...tec.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Takashi Iwai <tiwai@...e.de>
CC:	Vineet Gupta <Vineet.Gupta1@...opsys.com>,
	"jeremy.bennett@...ecosm.com" <jeremy.bennett@...ecosm.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Claudiu Zissulescu <Claudiu.Zissulescu@...opsys.com>,
	Francois Bedard <Francois.Bedard@...opsys.com>
Subject: [PATCH] kernel/modsign_certificate.S: use real contents instead of
 macro GLOBAL()

For some architectures, tool chain is not smart enough to recognize the
macro with multiple lines (e.g. arc tool chain), and for common ".S"
file, this kind of macro is also rarely used.

So expand the related contents of macro to let it pass compiling (can
use "arc-elf32-objdump -x" to know about it).

The related error (allmodconfig for arc):

    LD      init/built-in.o
  kernel/built-in.o: In function `load_module_signing_keys':
  kernel/modsign_pubkey.c:66: undefined reference to `modsign_certificate_list'
  kernel/modsign_pubkey.c:71: undefined reference to `modsign_certificate_list_end'
  kernel/modsign_pubkey.c:67: undefined reference to `modsign_certificate_list_end'

The related tool chain information:

  [root@...enlinux linux-next]# arc-elf32-as -v
  GNU assembler version 2.23.2 (arc-elf32) using BFD version (GNU Binutils) 2.23.2
  [root@...enlinux linux-next]# arc-elf32-ld -v
  GNU ld (GNU Binutils) 2.23.2
  [root@...enlinux linux-next]# arc-elf32-gcc -v
  Using built-in specs.
  COLLECT_GCC=arc-elf32-gcc
  COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/arc-elf32/4.8.0/lto-wrapper
  Target: arc-elf32
  Configured with: ../gcc/configure --without-header --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 : (reconfigured) ../gcc/configure --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 : (reconfigured) ../gcc/configure --without-header --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 --disable-multilib --with-headers=../newlib/newlib/libc/include
  Thread model: single
  gcc version 4.8.0 (GCC) 

Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 kernel/modsign_certificate.S |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/kernel/modsign_certificate.S b/kernel/modsign_certificate.S
index 4a9a86d..1967dcd 100644
--- a/kernel/modsign_certificate.S
+++ b/kernel/modsign_certificate.S
@@ -1,12 +1,10 @@
 #include <linux/export.h>

-#define GLOBAL(name)	\
-	.globl VMLINUX_SYMBOL(name);	\
-	VMLINUX_SYMBOL(name):
-
 	.section ".init.data","aw"

-GLOBAL(modsign_certificate_list)
+	.globl VMLINUX_SYMBOL(modsign_certificate_list)
+VMLINUX_SYMBOL(modsign_certificate_list):
 	.incbin "signing_key.x509"
 	.incbin "extra_certificates"
-GLOBAL(modsign_certificate_list_end)
+	.globl VMLINUX_SYMBOL(modsign_certificate_list_end)
+VMLINUX_SYMBOL(modsign_certificate_list_end):
-- 
1.7.7.6
--
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