不晓得是不是我的驱动的错误，导致内存访问失效，2440使用的是linux的2.6.13内核，开机运行6，7个小时后，便报此错误，贴于此，我再看看问题是怎么来的。
allocation failed: out of vmalloc space - use vmalloc=<size> to increase size.
allocation failed: out of vmalloc space - use vmalloc=<size> to increase size.
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c3854000
[00000000] *pgd=3003d031, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1]
Modules linked in: callts lcdc
CPU: 0
PC is at s3c24xx_serial_start_tx+0x48/0xac
LR is at 0x1
pc : [<c017a3ac>] lr : [<00000001>] Tainted: P
sp : c331fe40 ip : 60000093 fp : c331fe58
r10: a0000013 r9 : c300c000 r8 : 00000014
r7 : c3808014 r6 : c0225c58 r5 : 00000001 r4 : 00000000
r3 : 00000064 r2 : 00000000 r1 : 00002793 r0 : 00000000
Flags: nZCv IRQs off FIQs on Mode SVC_32 Segment user
Control: C000717F Table: 33854000 DAC: 00000015
Process proxt (pid: 360, stack limit = 0xc331e194)
Stack: (0xc331fe40 to 0xc3320000)
fe40: 60000013 c3c1b3a4 00000000 c331fe68 c331fe5c c0174dd0 c017a374 c331fe7c
fe60: c331fe6c c0174df0 c0174d88 00000000 c331fea8 c331fe80 c01753e8 c0174de4
fe80: c3808000 c300c000 00000014 fffffff2 00000000 c331fecc c331e000 c331ff08
fea0: c331feac c0165e54 c0175338 c300c934 c3808000 c37efd20 00000000 c3e60300
fec0: c0074b5c 00000000 00000000 00000000 c3e60300 c0074b5c c300c934 c300c934
fee0: 00000014 c300c000 00000014 fffffff2 412ab000 c331e000 c300cbe4 c331ff4c
ff00: c331ff0c c0160724 c0165b6c 00000000 00000000 00000014 c0165b5c c300c00c
ff20: c37efd20 00000014 00000000 c37efd20 412ab000 c331e000 c331e000 c331ff78
ff40: c331ff74 c331ff50 c00b1154 c0160554 c37efd44 c37efd20 c331ff78 00000000
ff60: 00000000 4081f64c c331ffa4 c331ff78 c00b128c c00b10a4 00000000 00000000
ff80: 00000001 00000014 412ab000 00094050 00000004 c0062004 00000000 c331ffa8
ffa0: c0061e80 c00b1250 00000014 c01def10 00000009 412ab000 00000014 00000000
ffc0: 00000014 412ab000 00094050 00000014 00087e10 00088c5c 4081f64c be3ffb3c
ffe0: 00000000 be3ffab4 407d8f58 407c0554 60000010 00000009 00000000 00008000
Backtrace:
[<c017a364>] (s3c24xx_serial_start_tx+0x0/0xac) from [<c0174dd0>] (__uart_start+0x58/0x5c)
r6 = 00000000 r5 = C3C1B3A4 r4 = 60000013
[<c0174d78>] (__uart_start+0x0/0x5c) from [<c0174df0>] (uart_start+0x1c/0x24)
[<c0174dd4>] (uart_start+0x0/0x24) from [<c01753e8>] (uart_write+0xc0/0xc8)
r4 = 00000000
[<c0175328>] (uart_write+0x0/0xc8) from [<c0165e54>] (write_chan+0x2f8/0x36c)
[<c0165b5c>] (write_chan+0x0/0x36c) from [<c0160724>] (tty_write+0x1e0/0x298)
[<c0160544>] (tty_write+0x0/0x298) from [<c00b1154>] (vfs_write+0xc0/0x138)
[<c00b1094>] (vfs_write+0x0/0x138) from [<c00b128c>] (sys_write+0x4c/0x74)
[<c00b1240>] (sys_write+0x0/0x74) from [<c0061e80>] (ret_fast_syscall+0x0/0x2c)
r8 = C0062004 r7 = 00000004 r6 = 00094050 r5 = 412AB000
r4 = 00000014
Code: e3a01004 e3a02000 e59f0060 ebfbbab4 (e5903000)
