wrong sched_pin() on 64bits linux platform when ncpus > 32

[zhouchengming1]

Hi, we found a bug in sched_pin() on 64bits linux platform when ncpus > 32.

The code is like this:
int word = i / (8 * sizeof(unsigned long));
int bit = i % (8 * sizeof(unsigned long));
mask[word] |= (1 << bit);

On 64bits platform, bit can be [0, 63], but (1 << bit) has only 32 bits.
So if we want to bind this task to cpu33, (1 << 33) == (1 << 1), then this task will be bind to cpu1.

If I modify the code like this, I can get correct results.
mask[word] |= ((unsigned long)1 << bit);
Because ((unsigned long)1 << bit) has 64 bits.

Thanks.

[mateoconlechuga]

You should really be using the stdint.h definitions uint64_t as well.