Compiling with mellanox headers

I have been trying to compile my code with mlnx-ofed-kernel-3.3/ headers but it is picking the kernel headers. The function definition in the kernel headers and mlnx-headers is different.

The make file I am using is:

ccflags-y=-I/usr/src/mlnx-ofed-kernel-3.3/include/

obj-m += mymodule.o myothermodule.o

.PHONY: copy_symvers load unload

ifndef PATH_KERNEL

PATH_KERNEL = /lib/modules/$(shell uname -r)/build

endif

all:

  make -C ${PATH_KERNEL} M=$(PWD) modules

copy_symvers:

  cp /usr/src/ofa_kernel/default/Module.symvers .

load:

  sudo insmod mymodule.ko

unload:

  sudo rmmod -f mymodule.ko

clean:

  make -C ${PATH_KERNEL} M=$(PWD) clean

  rm *~ -f

Can somebody point out the mistake?