On Thu, Apr 25, 2019 at 10:02 PM Pankaj Gupta <pagupta@xxxxxxxxxx> wrote: > > This patch adds 'DAXDEV_SYNC' flag which is set > for nd_region doing synchronous flush. This later > is used to disable MAP_SYNC functionality for > ext4 & xfs filesystem for devices don't support > synchronous flush. > > Signed-off-by: Pankaj Gupta <pagupta@xxxxxxxxxx> [..] > diff --git a/include/linux/dax.h b/include/linux/dax.h > index 0dd316a74a29..c97fc0cc7167 100644 > --- a/include/linux/dax.h > +++ b/include/linux/dax.h > @@ -7,6 +7,9 @@ > #include <linux/radix-tree.h> > #include <asm/pgtable.h> > > +/* Flag for synchronous flush */ > +#define DAXDEV_F_SYNC true I'd feel better, i.e. it reads more canonically, if this was defined as (1UL << 0) and the argument to alloc_dax() was changed to 'unsigned long flags' rather than a bool.
