Re: [PATCH] staging: exfat: add exfat filesystem code to staging

Joe Perches
2019-08-29T16:59:27Z

On Fri, 2019-08-30 at 00:44 +0800, Gao Xiang wrote:
> Hi Dan,
>
> On Thu, Aug 29, 2019 at 11:43:46PM +0800, Dan Carpenter wrote:
> > > p.s. There are 2947 (un)likely places in fs/ directory.
> >
> > I was complaining about you adding new pointless ones, not existing
> > ones. The likely/unlikely annotations are supposed to be functional and
> > not decorative. I explained this very clearly.
> >
> > Probably most of the annotations in fs/ are wrong but they are also
> > harmless except for the slight messiness. However there are definitely
> > some which are important so removing them all isn't a good idea.
> >
> > > If you like, I will delete them all.
> >
> > But for erofs, I don't think that any of the likely/unlikely calls have
> > been thought about so I'm fine with removing all of them in one go.
>
> Anyway, I have removed them all in
> https://lore.kernel.org/r/20190829163827.203274-1-gaoxiang25@huawei.com/
>
> Does it look good to you?

Unrelated bikeshed from a trivial look:

There's a block there that looks like:

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
[]
@@ -70,7 +70,7 @@ struct page *__erofs_get_meta_page(struct super_block *sb,
}

err = bio_add_page(bio, page, PAGE_SIZE, 0);
- if (unlikely(err != PAGE_SIZE)) {
+ if (err != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}

The initial assignment to err is odd as it's not
actually an error value -E<FOO> but a int size
from a unsigned int len.

Here the return is either 0 or PAGE_SIZE.

This would be more legible to me as:

if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}