On Wed, 22 Oct 2014 13:09:28 +0200 Dominik Dingel <dingel@xxxxxxxxxxxxxxxxxx> wrote: > Add a new function stub to allow architectures to disable for > an mm_structthe backing of non-present, anonymous pages with > read-only empty zero pages. > > ... > > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -56,6 +56,10 @@ extern int sysctl_legacy_va_layout; > #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) > #endif > > +#ifndef mm_forbids_zeropage > +#define mm_forbids_zeropage(X) (0) > +#endif Can we document this please? What it does, why it does it. We should also specify precisely which arch header file is responsible for defining mm_forbids_zeropage. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>