我使用s3c2410+linux2.6.25.20+arm-linux-gcc4.3.3(使用过其它较低版本3.4.5则不会出现这个问题)加载fat.ko等fat文件系统模块时候会报错，并不是全部都报错，某些简单的如led.ko不会。
http://www.arm9home.net/read.php?tid-1708.html
从上网站中获取补丁，补丁内容如下，按照修改内核问题解决：
# Author: Daniel Silverstone (Fri Mar 20 10:11:43 GMT 2009)
# Committer: Russell King (Sat Mar 21 11:22:33 GMT 2009)
#
# [ARM] 5428/1: Module relocation update for R_ARM_V4BX
#
# It would seem when building kernel modules with modern binutils
# (required by modern GCC) for ARM v4T targets (specifically observed
# with the Samsung 24xx SoC which is an 920T) R_ARM_V4BX relocations
# are emitted for function epilogues.
#
# This manifests at module load time with an "unknown relocation: 40"
# error message.
#
# The following patch adds the R_ARM_V4BX relocation to the ARM kernel
# module loader. The relocation operation is taken from that within the
# binutils bfd library.
#
# Signed-off-by: Simtec Linux Team
# Signed-off-by: Vincent Sanders
# Signed-off-by: Russell King
#
# arch/arm/include/asm/elf.h | 1 +
# arch/arm/kernel/module.c | 9 +++++++++
# 2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index a58378c..ce3b36e 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h //我修改的是 include/asm-arm/elf.h 文件
@@ -50,6 +50,7 @@ typedef struct user_fp elf_fpregset_t;
#define R_ARM_ABS32 2
#define R_ARM_CALL 28
#define R_ARM_JUMP24 29
+#define R_ARM_V4BX 40
/*
* These are used to set parameters in the core dumps.
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index dab48f2..9f509fd 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -132,6 +132,15 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
*(u32 *)loc |= offset & 0x00ffffff;
break;
+ case R_ARM_V4BX:
+ /* Preserve Rm and the condition code. Alter
+ * other bits to re-code instruction as
+ * MOV PC,Rm.
+ */
+ *(u32 *)loc &= 0xf000000f;
+ *(u32 *)loc |= 0x01a0f000;
+ break;
+
default:
printk(KERN_ERR "%s: unknown relocation: %u\n",
module->name, ELF32_R_TYPE(rel->r_info));
