On Thu, 12 Jul 2018 17:09:34 -0700 Omar Sandoval <osandov@xxxxxxxxxxx> wrote: > From: Omar Sandoval <osandov@xxxxxx> > > Now we only need kclist_lock from user context and at fs init time, and > the following changes need to sleep while holding the kclist_lock. > > ... > > --- a/fs/proc/kcore.c > +++ b/fs/proc/kcore.c > @@ -59,8 +59,8 @@ struct memelfnote > }; > > static LIST_HEAD(kclist_head); > -static DEFINE_RWLOCK(kclist_lock); > -static int kcore_need_update = 1; > +static DECLARE_RWSEM(kclist_lock); > +static atomic_t kcore_need_update = ATOMIC_INIT(1); It's unclear why kcore_need_update was changed to atomic_t - it's still updated under kclist_lock? Maybe it's for a later patch.
