On Tuesday 11 July 2006 18:13, Vadim Lobanov wrote:
> > unsinged long round_up_pow_of_two(unsigned long x)
> > {
> > unsigned long res = 1 << BITS_PER_LONG;
>
> You'll get a zero here. Should be 1 << (BITS_PER_LONG - 1).
>
Nope. It wont work on 64 bits platform :)
You want 1UL << (BITS_PER_LONG - 1).
But the roundup_pow_of_two() function is already defined in
include/linux/kernel.h and uses fls_long()
Eric
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