Unable to handle kernel NULL pointer dereference at virtual address 00000000
自己用arm-linux-gcc-3.4.1交叉工具链编译的内核和文件系统下载到pxa270开发板上 结果出现如下错误 该如何解决
Please press Enter to activate this console. kernel BUG at arch/arm/mm/consiste!
Unable to handle kernel NULL pointer dereference at virtual address 00000000  
pgd = c0004000  
[00000000] *pgd=00000000  
Internal error: Oops: 817 [#1]  
Modules linked in:  
CPU: 0 Not tainted (2.6.22.10 #154)  
PC is at __bug+0x20/0x2c  
LR is at 0xc0271e94  
pc : [<c0024b94>] lr : [<c0271e94>] psr: 60000013  
sp : c03a7d08 ip : c0271e94 fp : c03a7d14  
r10: 00800080 r9 : 01480000 r8 : 00000000  
r7 : c027ea58 r6 : 01480000 r5 : 000fa000 r4 : 00000002  
r3 : 00000000 r2 : 00000001 r1 : 00000001 r0 : 0000002f  
Flags: nZCv IRQs on FIQs on Mode SVC_32 Segment kernel  
Control: 0000397f Table: a3ffc000 DAC: 00000017  
Process pdflush (pid: 55, stack limit = 0xc03a6260)  
Stack: (0xc03a7d08 to 0xc03a8000)  
7d00: c03a7d24 c03a7d18 c0026578 c0024b80 c03a7d34 c03a7d28  
7d20: c016b20c c00264f8 c03a7db0 c03a7d38 c016790c c016b1f8 c03a7d44 00000004  
7d40: c3dff778 c03a7d60 c03a7d54 c0089768 c0089704 00010001 00800080 00800080  
7d60: 00000000 c03d5ce0 c0032b98 00000000 00000000 00000000 c03d5ce0 c0032b98  
7d80: 00000000 00000000 00000004 00000002 c027ea58 01480000 00000000 c0169988  
7da0: c3dff778 c03a7e14 c03a7db4 c0169c08 c016784c 00040000 000fa000 00000003  
7dc0: 00040000 c0279509 c03613c0 c03a7df0 c03a7ddc c008d0b8 c00fe000 fffffffe  
7de0: 00d000d0 00200020 00500050 00040000 01480000 00000000 00000000 01480000  
7e00: c0169988 00000000 c03a7e5c c03a7e18 c0166134 c0169994 00000000 c3cb5ec0  
7e20: c3cb5ec0 c3dff778 c3dff740 c027ea58 c0169988 c3c82860 c3c82860 c3ca7a00  
7e40: 00000000 c3ca7ab8 00000000 00000000 c03a7e7c c03a7e60 c016a110 c0165f5c  
7e60: 00040000 00000000 c3cbedc0 c3c82860 c03a7e94 c03a7e80 c01616e8 c016a0ec  
7e80: c3c82860 c3cd2ed4 c03a7f10 c03a7e98 c00e3e20 c01616a0 c007fd18 c007e2b0  
7ea0: c3ca7ac0 c3ca7af4 00000000 fffffff4 c03a7ed4 c03a7ec0 c007fd48 c007fc9c  
7ec0: c02843a8 c03a7ee8 c03a7f5c 0000000a c03a7f50 ffffffff 00000002 c03a7f5c  
7ee0: c03a7f69 00000000 c3ca7a00 00000000 c02759dc c0275688 c03a7f50 00000000  
7f00: 00000000 c03a7f28 c03a7f14 c00e4e0c c00e38e0 c3ca7c00 c3ca7c3c c03a7f44  
7f20: c03a7f2c c0078f48 c00e4de0 c03a7fb0 c02756c8 c0272a74 c03a7f9c c03a7f48  
7f40: c005e328 c0078ed4 c0042afc 00000000 00000000 00000000 c03a7f48 00000000  
7f60: 00000000 00000000 00000000 00000000 00000000 00000025 00000000 c03a7fb0  
7f80: c02756c8 c03a7fa4 c03a6000 c0272a74 c03a7fdc c03a7fa0 c005f33c c005e2d8  
7fa0: 00000001 c03d5ce0 c005e2cc 00000000 c03a7fb0 c03a7fb0 ffff8b07 fffffffc  
7fc0: c005f20c 00000000 00000000 00000000 c03a7ff4 c03a7fe0 c004964c c005f218  
7fe0: 00000000 00000000 00000000 c03a7ff8 c0038700 c0049604 00000000 7