memcg: workingset: remove folio_memcg_rcu usage

The function workingset_activation() is called from folio_mark_accessed()
with the guarantee that the given folio can not be freed under us in
workingset_activation().  In addition, the association of the folio and
its memcg can not be broken here because charge migration is no more. 
There is no need to use folio_memcg_rcu.  Simply use folio_memcg_charged()
because that is what this function cares about.

[[email protected]: provide folio_memcg_charged stub for CONFIG_MEMCG=n]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Shakeel Butt <[email protected]>
Suggested-by: Yu Zhao <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Yosry Ahmed <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions