When I compile 2.4.0-prerelease with the 200012252 gcc 
snapshot I get the following warnings:

make[3]: Entering directory `/usr/src/linux/drivers/acpi/hardware'
gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-
prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe -
mpreferred-stack-boundary=2 -march=k6  -I../include -D_LINUX  -c -
o hwcpu32.o hwcpu32.c
hwcpu32.c:711:1: warning: no newline at end of file
make[3]: Leaving directory `/usr/src/linux/drivers/acpi/hardware'
make[3]: Entering directory `/usr/src/linux/drivers/acpi/namespace'
gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-
prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe -
mpreferred-stack-boundary=2 -march=k6  -I../include -D_LINUX  -c -
o nsxfobj.o nsxfobj.c
nsxfobj.c:697:1: warning: no newline at end of file
make[3]: Leaving directory `/usr/src/linux/drivers/acpi/namespace'

Attached is a patch that removes these warnings.  Please consider 
this patch for the final release.

Rich