Re: [PATCH v6 10/12] mmap locking API: rename mmap_sem to mmap_lock

[Michel Lespinasse]

On Thu, Jun 4, 2020 at 1:16 AM youling 257 <youling257@xxxxxxxxx> wrote:
> 2020-06-04 13:57 GMT+08:00, Michel Lespinasse <walken@xxxxxxxxxx>:
> > However I would like more information about your report. Did you apply
> > the series yourself ? If so, what base tree did you apply it onto ? If
> > not, what tree did you use that already included the series ?
>
> I build linux next-20200603 tree have the kernel/sys.c error.

Thanks for the info.

The proper fix is to replace down_write(&mm->mmap_sem) with
mmap_write_lock(mm) and up_write(&mm->mmap_sem) with
mmap_write_unlock(mm)

If you just needed a quick fix to get the tree to build, what you did
(replacing mmap_sem with mmap_lock) is also fine.

Thanks again !

-- 
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.