On Monday 12 October 2015 15:59:27 Neil Brown wrote:
> > diff --git a/drivers/md/md.c b/drivers/md/md.c
> > index 7fff1e6884d6..e13f72a3b561 100644
> > --- a/drivers/md/md.c
> > +++ b/drivers/md/md.c
> > @@ -8987,9 +8987,9 @@ static void check_sb_changes(struct mddev *mddev,
> > struct md_rdev *rdev)
> >
> > /* recovery_cp changed */
> > if (le64_to_cpu(sb->resync_offset) != mddev->recovery_cp) {
> > - pr_info("%s:%d recovery_cp changed from %lu to %lu\n",
> > __func__,
> > - __LINE__, mddev->recovery_cp,
> > - (unsigned long)
> > le64_to_cpu(sb->resync_offset));
> > + pr_info("%s:%d recovery_cp changed from %llu to %llu\n",
> > __func__,
> > + __LINE__, (u64)mddev->recovery_cp,
> > + (u64) le64_to_cpu(sb->resync_offset));
> > mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
> > }
> >
>
> Thanks, but is this really right?
> I think u64 is "unsigned long" on 64bit.
> I have always used (unsigned long long) when I want to use %llu on
> sector_t.
>
> How confident are you of using "u64" ?
Very confident ;-)
This used to not work until some linux-2.6 version when we changed all
architectures to use asm-generic/int-ll64.h in the kernel, because
a lot of code relied on printing u64 variables using %lld.
I tend to use u64 for things like this because it's shorter than
'unsigned long long'.
Arnd
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