On May 10 2007 16:22, NeilBrown wrote:
>
>diff .prev/drivers/md/md.c ./drivers/md/md.c
>--- .prev/drivers/md/md.c 2007-05-10 15:51:54.000000000 +1000
>+++ ./drivers/md/md.c 2007-05-10 16:05:10.000000000 +1000
>@@ -5095,7 +5095,7 @@ static int is_mddev_idle(mddev_t *mddev)
> *
> * Note: the following is an unsigned comparison.
> */
>- if ((curr_events - rdev->last_events + 4096) > 8192) {
>+ if ((long)curr_events - (long)rdev->last_events > 4096) {
> rdev->last_events = curr_events;
> idle = 0;
> }
What did really change? Unless I am seriously mistaken,
curr_events - last_evens + 4096 > 8192
is mathematically equivalent to
curr_events - last_evens > 4096
The casting to (long) may however force a signed comparison which turns
things quite upside down, and the comment does not apply anymore.
Jan
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