linux2.6.38 mini2440 nand驱动移植时的问题求教！
我配置好nand驱动时，编译好内核，烧到板子上时，启动内核出现下面错误，求帮助啊！Unable to handle kernel NULL pointer dereference at virtual address 00000004
pgd = c0004000
*pgd=00000000
Internal error: Oops: 5 [#1]
last sysfs file:
Modules linked in:
CPU: 0 Not tainted(2.6.38.8 #3)
PC is at s3c24xx_nand_probe+0x194/0x460
LR is at 0x0
pc : [<c01ee188>] lr : [<00000000>] psr: 80000013
sp : c3827f08ip : 00000000fp : 00000001
r10: c04000a0r9 : 00000000r8 : 00000000
r7 : 00000000r6 : 00000000r5 : c39aa9c0r4 : c389fc00
r3 : 00000032r2 : 00000000r1 : c4c00000r0 : c389fc00
Flags: NzcvIRQs onFIQs onMode SVC_32ISA ARMSegment kernel
Control: c000717fTable: 30004000DAC: 00000017
Process swapper (pid: 1, stack limit = 0xc3826270)
Stack: (0xc3827f08 to 0xc3828000)
7f00: 00000000 00000003 c3860a20 00000000 c0410ad4 c04000a8
7f20: c04000a8 c0410ad4 c39d3540 c040d5b8 00000000 00000000 00000000 c01c4ee0
7f40: c04000a8 c01c4054 c04000a8 c04000dc c0410ad4 c01c416c 00000000 c01c4110
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