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nivxi will not compile with Redhat 7.3 kernel 2.4.20-18.7

I am unable to compile nivxi after upgrading RedHat 7.3 kernel to 2.4.20-18.7. I get the following error message:

kgcc -o vxi.o -DVXI_MAJOR=0 -c -O2 -Wall -D__KERNEL__ -DMODULE -DMODVERSIONS -include /lib/modules/2.4.20-18.7/build/include/linux/modversions.h -I/lib/modules/2.4.20-18.7/build/include vxi.c
vxi.c: In function `vxi_mmap':
vxi.c:220: warning: passing arg 1 of `remap_page_range_R323728a8' makes pointer from integer without a cast
vxi.c:220: incompatible type for argument 4 of `remap_page_range_R323728a8'
vxi.c:220: too few arguments to function `remap_page_range_R323728a8'
make: *** [vxi.o] Error 1


It is my understanding that RedHat 7.3 is supported. Which kernels are supported?
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Aaron,

In this release of the Linux Kernel 2.4.20-18.7, RedHat changed the interface of remap_page_range. Please contact National Instruments at 1-866-275-6964 and enter the service request we discussed earlier on the phone and I will help you get started. Thanks!

Anthony Bacak
National Instruments
Applications Engineering
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