2 #include <linux/kernel.h>
3 #include <linux/module.h>
6 * int_sqrt - rough approximation to sqrt
7 * @x: integer of which to calculate the sqrt
9 * A very rough approximation to the sqrt() function.
11 unsigned long int_sqrt(unsigned long x
)
13 unsigned long op
, res
, one
;
18 one
= 1UL << (BITS_PER_LONG
- 2);
23 if (op
>= res
+ one
) {
24 op
= op
- (res
+ one
);
32 EXPORT_SYMBOL(int_sqrt
);
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