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mm: simplify folio_memcg_charged()

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There's no need to check which kind of pointer is in the memcg_data field,
all we actually care about is whether it's zero or not.  Saves 70 bytes in
workingset_activation() with the Debian config.

Link: https://lkml.kernel.org/r/20250314133617.138071-5-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-03-14 13:36:14 +00:00 • committed by Andrew Morton
parent 7cc57ecae4
commit 8492936abb
1 changed files with 1 additions and 3 deletions
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4
include/linux/memcontrol.h
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@ -438,9 +438,7 @@ static inline struct mem_cgroup *folio_memcg(struct folio *folio)
*/
static inline bool folio_memcg_charged(struct folio *folio)
{
if (folio_memcg_kmem(folio))
return __folio_objcg(folio) != NULL;
return __folio_memcg(folio) != NULL;
return folio->memcg_data != 0;
}
/*