Hi.
To meet trouble which compile the schar.c in chapter18 of Beginning learn linux 3-version:
# make
schar.c: In function `schar_mmap':
schar.c:179: warning: passing arg 1 of `remap_page_range_R2baf18f2' makes pointer from integer without a cast
schar.c:179: incompatible type for argument 4 of `remap_page_range_R2baf18f2'
schar.c:179: too few arguments to function `remap_page_range_R2baf18f2'
make: *** [schar.o] Error 1

It running RedHat 9.0 kernel-2.4.20-8

I want to get help from you , thanks