[PATCH slab/for-next 08/14] powerpc/mm: specify SLAB_MAY_ACCOUNT for pgtable caches

["Harry Yoo (Meta)" <harry@kernel.org>]

User page tables are allocated from PGT_CACHE() with
pgtable_gfp_flags(), which adds __GFP_ACCOUNT for non-kernel mms.
Specify SLAB_MAY_ACCOUNT when the object may be charged to a memcg.
__GFP_ACCOUNT without SLAB_MAY_ACCOUNT will not be allowed.

Path: copy_process() -> mm_init() -> pgd_alloc()
  -> kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
                      pgtable_gfp_flags(mm, GFP_KERNEL))

Assisted-by: LLM
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Harry Yoo (Meta) <harry@kernel.org>
---
 arch/powerpc/mm/init-common.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c
index 745097554bea..72dfcc559630 100644
--- a/arch/powerpc/mm/init-common.c
+++ b/arch/powerpc/mm/init-common.c
@@ -140,7 +140,8 @@ void pgtable_cache_add(unsigned int shift)
 	align = max_t(unsigned long, align, minalign);
 	name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift);
 	if (name)
-		new = kmem_cache_create(name, table_size, align, 0, ctor(shift));
+		new = kmem_cache_create(name, table_size, align,
+					SLAB_MAY_ACCOUNT, ctor(shift));
 	if (!new)
 		panic("Could not allocate pgtable cache for order %d", shift);
 

-- 
2.54.0