There is a compile error with the rc2 driver....stable release compiles OK....are you aware of that? This is one 2.4.xx kernel...

gcc -D__KERNEL__ -DMODULE=1 -I/usr/src/alsa/alsa-driver-1.0.10rc2/include  -I/lib/modules/2.4.22-1.SML/build/include -O2 -mpreferred-stack-boundary=2 -march=i686 -Wdeclaration-after-statement -DLINUX -Wall -Wstrict-prototypes -fomit-frame-pointer -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common -pipe -DALSA_BUILD -nostdinc -iwithprefix include -DMODVERSIONS -include /lib/modules/2.4.22-1.SML/build/include/linux/modversions.h  -DKBUILD_BASENAME=memory   -c -o memory.o memory.c
In file included from memory.c:2:
../alsa-kernel/core/memory.c:37: syntax error before '*' token
../alsa-kernel/core/memory.c:38: warning: function declaration isn't a prototype../alsa-kernel/core/memory.c: In function `copy_to_user_fromio':
../alsa-kernel/core/memory.c:40: `count' undeclared (first use in this function)../alsa-kernel/core/memory.c:40: (Each undeclared identifier is reported only once
../alsa-kernel/core/memory.c:40: for each function it appears in.)
../alsa-kernel/core/memory.c:40: `dst' undeclared (first use in this function)
../alsa-kernel/core/memory.c:40: syntax error before "__force"
../alsa-kernel/core/memory.c:40: syntax error before "__force"
In file included from memory.c:2:
../alsa-kernel/core/memory.c: At top level:
../alsa-kernel/core/memory.c:68: syntax error before '*' token
../alsa-kernel/core/memory.c:69: warning: function declaration isn't a prototype../alsa-kernel/core/memory.c: In function `copy_from_user_toio':
../alsa-kernel/core/memory.c:71: `count' undeclared (first use in this function)../alsa-kernel/core/memory.c:71: syntax error before "__force"
../alsa-kernel/core/memory.c:71: `src' undeclared (first use in this function)
../alsa-kernel/core/memory.c:71: syntax error before "__force"
make[1]: *** [memory.o] Error 1
make[1]: Leaving directory `/usr/src/alsa/alsa-driver-1.0.10rc2/acore'
make: *** [compile] Error 1