[PATCH] Move filep_cachep to include/file.h

filp_cachep is only used in fs/file_table.c and in fs/dcache.c where
it is defined.

Move it to related definitions in linux/file.h.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>