hi ,
i need to do some floating point operation inside
kernel ( in a module ) , what i exactly want is to use
the following equation :
x(i) = a k(i) + (1 - a ) x( i - 1 ) { this is EWMA }
here ,
x(i) -> exponential average at time 'i'
k(i) -> event intensity at time i
and VALUE OF a : 0 < a < 1 .
The problem is : 'printk ' does not recognise the
floating point numbers ( i tried ) , i have also read
in a paper called "Rusty's unreliable guide for kernel
hacking " that floating point operations can not be
performed inside the kernel .
i do'nt know whether floating point operations can be
done in kernel or not ( i di'nt debug to see the
operation ) .
So is there any way to perform floating point
operation inside kernel , if yes what , if no how do i
use that equation ( it is critical for my project ,
can not be eliminated ) .
thanx ,
Rgds,
Pankaj Chauhan
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