Re: [PATCH] mm/vmalloc: Check absolute error return from vmap_[p4d|pud|pmd|pte]_range()

[Matthew Wilcox]

On Thu, Jun 13, 2019 at 08:51:17PM +0530, Anshuman Khandual wrote:
> acceptable ? What we have currently is wrong where vmap_pmd_range() could
> just wrap EBUSY as ENOMEM and send up the call chain.

It's not wrong.  We do it in lots of places.  Unless there's a caller
which really needs to know the difference, it's often better than
returning the "real error".