There are no more cpu slabs so we don't need their deferred
deactivation. The function is now only used from places where we
allocate a new slab but then can't spin on node list_lock to put it on
the partial list. Instead of the deferred action we can free it directly
via __free_slab(), we just need to tell it to use _nolock() freeing of
the underlying pages and take care of the accounting.

Since free_frozen_pages_nolock() variant does not yet exist for code
outside of the page allocator, create it as a trivial wrapper for
__free_frozen_pages(..., FPI_TRYLOCK).

Signed-off-by: Vlastimil Babka <redacted>
---
 mm/internal.h   |  1 +
 mm/page_alloc.c |  5 +++++
 mm/slab.h       |  8 +-------
 mm/slub.c       | 56 ++++++++++++++++++++------------------------------------
 4 files changed, 27 insertions(+), 43 deletions(-)

index b08e775dc4cb..33f218c0e8d6 100644

--- a/mm/slub.c
+++ b/mm/slub.c

@@ -3260,7 +3260,7 @@ static struct slab *new_slab(struct kmem_cache *s, gfp_t flags, int node)
 		flags & (GFP_RECLAIM_MASK | GFP_CONSTRAINT_MASK), node);
 }
 
-static void __free_slab(struct kmem_cache *s, struct slab *slab)
+static void __free_slab(struct kmem_cache *s, struct slab *slab, bool allow_spin)
 {
 	struct page *page = slab_page(slab);
 	int order = compound_order(page);

@@ -3271,14 +3271,26 @@ static void __free_slab(struct kmem_cache *s, struct slab *slab)
 	__ClearPageSlab(page);
 	mm_account_reclaimed_pages(pages);
 	unaccount_slab(slab, order, s);