hfs_rwarg_t

[root <ngustavson@emacinc.com>]

Does anyone know what an hfs_rwarg_t is?

I have been grepping through my kernel source (2.4.14) to find out the 
what a size_t is typedef as. Turns out it's a hfs_rwarg_t, but nothing 
is typedef to it. 

The reason I am so concerned about this is I am working on a driver that
uses copy_to_user in it's read function. 

Every time I try to do anything to the count field(the size_t) I cause a 
seg fault. Even passing a constant 1 the copy_to_user function seems to 
cause a seg fault. 
But if I just pass count to copy_to_user it works fine.

If this is a reference that kind of makes sense, 
hence what is a hfs_rwarg_t.