On Sat 15-06-19 11:24:47, Tejun Heo wrote: > Add a helper to determine the target blkcg from wbc. > > Signed-off-by: Tejun Heo <[email protected]> > Reviewed-by: Josef Bacik <[email protected]>
Looks good to me. You can add: Reviewed-by: Jan Kara <[email protected]> Honza > --- > include/linux/writeback.h | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/include/linux/writeback.h b/include/linux/writeback.h > index b8f5f000cde4..800ee031e88a 100644 > --- a/include/linux/writeback.h > +++ b/include/linux/writeback.h > @@ -11,6 +11,7 @@ > #include <linux/flex_proportions.h> > #include <linux/backing-dev-defs.h> > #include <linux/blk_types.h> > +#include <linux/blk-cgroup.h> > > struct bio; > > @@ -93,6 +94,16 @@ static inline int wbc_to_write_flags(struct > writeback_control *wbc) > return 0; > } > > +static inline struct cgroup_subsys_state * > +wbc_blkcg_css(struct writeback_control *wbc) > +{ > +#ifdef CONFIG_CGROUP_WRITEBACK > + if (wbc->wb) > + return wbc->wb->blkcg_css; > +#endif > + return blkcg_root_css; > +} > + > /* > * A wb_domain represents a domain that wb's (bdi_writeback's) belong to > * and are measured against each other in. There always is one global > -- > 2.17.1 > -- Jan Kara <[email protected]> SUSE Labs, CR
