LinuxQuestions.org - 2.6 kernel OOPS error code: 817

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2.6 kernel OOPS error code: 817

I know that the number followed by 'Oops: ' contains some information about the kernel oops including 'read/write' or 'kernel/user mode' or 'page not found/protect fault'.
Could you explain the meaning of the number, '817'?

Code:

Unable to handle kernel NULL pointer dereference at virtual address 00000000

Internal error: Oops: 817 [#1]

CPU: 0

pc : [<c00f2268>]    lr : [<c01f89f0>]    Not tainted

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