On Tue, Sep 27, 2016 at 06:08:15PM +0200, Jan Kara wrote: > We don't check whether vma->vm_ops is NULL in do_shared_fault() so > there's hardly any point in checking it in wp_page_shared() which gets > called only for shared file mappings as well. > > Signed-off-by: Jan Kara <[email protected]> > --- > mm/memory.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/memory.c b/mm/memory.c > index a4522e8999b2..63d9c1a54caf 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -2301,7 +2301,7 @@ static int wp_page_shared(struct vm_fault *vmf, struct > page *old_page) > > get_page(old_page); > > - if (vma->vm_ops && vma->vm_ops->page_mkwrite) { > + if (vma->vm_ops->page_mkwrite) { > int tmp; > > pte_unmap_unlock(vmf->pte, vmf->ptl); > -- > 2.6.6
Does this apply equally to the check in wp_pfn_shared()? Both wp_page_shared() and wp_pfn_shared() are called for shared file mappings via do_wp_page(). _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
