[Click] Error to configure the click router as linuxkernel

[me you]

Hi click team.

I have problem to install the click router as linuxkernel.
i already install the click router on debain with patch 2.6.
and the error is as follow.

/usr/include/linux/mm.h:591: error: ‘pgoff_t’ does not name a type
/usr/include/linux/mm.h:675: error: ‘loff_t’ has not been declared
/usr/include/linux/mm.h:696: error: ‘size_t’ was not declared in this scope
/usr/include/linux/mm.h:696: error: expected primary-expression before ‘struct’
/usr/include/linux/mm.h:696: error: initializer expression list treated as compound expression
/usr/include/linux/mm.h:697: error: variable or field ‘user_shm_unlock’ declared void
/usr/include/linux/mm.h:697: error: ‘size_t’ was not declared in this scope
/usr/include/linux/mm.h:697: error: expected primary-expression before ‘struct’
/usr/include/linux/mm.h:697: error: initializer expression list treated as compound expression
/usr/include/linux/mm.h:705: error: ‘pgoff_t’ does not name a type
/usr/include/linux/mm.h:706: error: ‘pgoff_t’ does not name a type
/usr/include/linux/mm.h:727: error: ‘loff_t’ has not been declared
/usr/include/linux/mm.h:727: error: ‘loff_t’ has not been declared
/usr/include/linux/mm.h:730: error: ‘loff_t’ has not been declared
/usr/include/linux/mm.h:730: error: ‘loff_t’ has not been declared
/usr/include/linux/mm.h:735: error: ‘loff_t’ has not been declared
/usr/include/linux/mm.h:736: error: ‘loff_t’ has not been declared
/usr/include/linux/mm.h:736: error: ‘loff_t’ has not been declared

Can some body help me.
thanks