Re: [PATCH 19/20] dax: Protect PTE modification on WP fault by radix tree entry lock

2016-10-19 Thread Ross Zwisler
On Wed, Oct 19, 2016 at 09:25:05AM +0200, Jan Kara wrote: > On Tue 18-10-16 13:53:32, Ross Zwisler wrote: > > On Tue, Sep 27, 2016 at 06:08:23PM +0200, Jan Kara wrote: > > > - void *entry; > > > + void *entry, **slot; > > > pgoff_t index = vmf->pgoff; > > > > > > spin_lock_irq(>tree_lock); >

Re: [PATCH 19/20] dax: Protect PTE modification on WP fault by radix tree entry lock

2016-10-19 Thread Jan Kara
On Tue 18-10-16 13:53:32, Ross Zwisler wrote: > On Tue, Sep 27, 2016 at 06:08:23PM +0200, Jan Kara wrote: > > - void *entry; > > + void *entry, **slot; > > pgoff_t index = vmf->pgoff; > > > > spin_lock_irq(>tree_lock); > > - entry = get_unlocked_mapping_entry(mapping, index, NULL);