Problems compiling kernel 2.5.45

Hi

I am running a mandrake 9.0 system with kernel 2.4.20, and I tried compiling the kernel 2.5.45. And I had some problems, which look like some bugs. While compiling the ATI Radeon driver I get the messages
rivers/video/radeonfb.c: In function `radeon_set_dispsw':
drivers/video/radeonfb.c:1578: structure has no member named `line_length'
drivers/video/radeonfb.c:1579: structure has no member named `visual'
drivers/video/radeonfb.c:1590: structure has no member named `line_length'
drivers/video/radeonfb.c:1591: structure has no member named `visual'
drivers/video/radeonfb.c:1606: structure has no member named `line_length'
drivers/video/radeonfb.c:1607: structure has no member named `visual'
drivers/video/radeonfb.c:1619: structure has no member named `line_length'
drivers/video/radeonfb.c:1620: structure has no member named `visual'
drivers/video/radeonfb.c: At top level:
drivers/video/radeonfb.c:2487: warning: `fbcon_radeon8' defined but not used
drivers/video/radeonfb.c:598: warning: radeon_read_OF' declared static' but never defined
drivers/video/radeonfb.c:1710: warning: `radeonfb_set_cmap' defined but not used
make[3]: *** [drivers/video/radeonfb.o] Error 1
make[2]: *** [drivers/video] Error 2
make[1]: *** [drivers] Error 2
make: *** [vmlinux] Error 2
Looking at the code, it seems that indeed the struct display has been changed in 2.5.45 but radeonfb.c still refers to non existent members of that struct. After putting in the old driver in its place, I got the following error messages in nfs

nclude/linux/intermezzo_fs.h:30:34: linux/intermezzo_lib.h: No such file or directory include/linux/intermezzo_fs.h:31:34: linux/intermezzo_idl.h: No such file or directory
In file included from fs/intermezzo/cache.c:42:
include/linux/intermezzo_fs.h:49: field remote_version' has incomplete type include/linux/intermezzo_fs.h:52: warning: struct izo_ioctl_data' declared inside parameter list include/linux/intermezzo_fs.h:52: warning: its scope is only this definition or declaration, which is probably not what you want In file included from fs/intermezzo/cache.c:42:
include/linux/intermezzo_fs.h:399: field fd_version' has incomplete type include/linux/intermezzo_fs.h:645: warning: struct izo_rcvd_rec' declared inside parameter list include/linux/intermezzo_fs.h:648: warning: struct izo_upcall_hdr' declared inside parameter list include/linux/intermezzo_fs.h:652: warning: struct izo_rcvd_rec' declared inside parameter list include/linux/intermezzo_fs.h:654: warning: struct izo_rcvd_rec' declared inside parameter list include/linux/intermezzo_fs.h:655: warning: struct izo_rcvd_rec' declared inside parameter list include/linux/intermezzo_fs.h: In function `izo_ioctl_getdata':
include/linux/intermezzo_fs.h:727: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:733: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:733: `IZO_IOCTL_VERSION' undeclared (first use in this function) include/linux/intermezzo_fs.h:733: (Each undeclared identifier is reported only once include/linux/intermezzo_fs.h:733: for each function it appears in.)
include/linux/intermezzo_fs.h:738: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:743: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:743: sizeof applied to an incomplete type
include/linux/intermezzo_fs.h:748: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:754: warning: passing arg 1 of `izo_ioctl_is_invalid' from incompatible pointer type include/linux/intermezzo_fs.h:759: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:760: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:760: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:763: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:764: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:764: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:765: warning: implicit declaration of function `size_round' include/linux/intermezzo_fs.h:765: dereferencing pointer to incomplete type
In file included from fs/intermezzo/cache.c:42:
include/linux/intermezzo_fs.h: At top level:
include/linux/intermezzo_fs.h:777: warning: struct izo_ioctl_data' declared inside parameter list include/linux/intermezzo_fs.h:778: warning: struct izo_ioctl_data' declared inside parameter list include/linux/intermezzo_fs.h:779: warning: struct izo_ioctl_data' declared inside parameter list include/linux/intermezzo_fs.h:862: warning: struct izo_ioctl_data' declared inside parameter list include/linux/intermezzo_fs.h: In function `izo_ioctl_packlen':
include/linux/intermezzo_fs.h:864: sizeof applied to an incomplete type
include/linux/intermezzo_fs.h:865: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:866: dereferencing pointer to incomplete type
include/linux/intermezzo_fs.h: At top level:
include/linux/intermezzo_fs.h:870: warning: struct izo_ioctl_data' declared inside parameter list include/linux/intermezzo_fs.h:871: conflicting types for izo_ioctl_is_invalid' include/linux/intermezzo_fs.h:52: previous declaration of izo_ioctl_is_invalid' include/linux/intermezzo_fs.h: In function izo_ioctl_is_invalid':
include/linux/intermezzo_fs.h:872: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:876: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:880: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:884: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:884: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:888: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:888: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:892: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:892: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:896: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:896: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:900: warning: passing arg 1 of `izo_ioctl_packlen' from incompatible pointer type include/linux/intermezzo_fs.h:900: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:904: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:905: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:905: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:909: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:910: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:910: dereferencing pointer to incomplete type include/linux/intermezzo_fs.h:910: dereferencing pointer to incomplete type
In file included from fs/intermezzo/cache.c:42:
include/linux/intermezzo_fs.h: At top level:
include/linux/intermezzo_fs.h:919: warning: struct kml_rec' declared inside parameter list include/linux/intermezzo_fs.h:920: warning: struct kml_rec' declared inside parameter list
make[2]: *** [fs/intermezzo/cache.o] Error 1
make[1]: *** [fs/intermezzo] Error 2

Again, looking at the sources, it lookes like a genuine error and not a configuration problem. So I removed this module and when I compiled again I got the error

gcc -Wp,-MD,net/ipv4/.ipmr.o.d -D__KERNEL__ -Iinclude -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -fno-common -pipe -mpreferred-stack-boundary=2 -march=pentium4 -Iarch/i386/mach-generic -nostdinc -iwithprefix include -DKBUILD_BASENAME=ipmr -c -o net/ipv4/ipmr.o net/ipv4/ipmr.c
net/ipv4/ipmr.c: In function `ipmr_forward_finish':
net/ipv4/ipmr.c:1114: structure has no member named pmtu' net/ipv4/ipmr.c: In function ipmr_queue_xmit':
net/ipv4/ipmr.c:1170: structure has no member named `pmtu' make[2]: *** [net/ipv4/ipmr.o] Error 1
make[1]: *** [net/ipv4] Error 2
make: *** [net] Error 2
and I could see that pmtu was a member in 2.4.20 but not in 2.5.45.

I am kinda new to compiling and configuring kernels and feel much more comfortable writing drivers and stacks for RTOSes. So is there anything obvious I have missed?? Or is it normal with pre-release kernels?

Abhishek