Re: [PATCH v3 09/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for m68k-motorola

[sashiko-bot@kernel.org]

> sun3 and coldfire are already supported, however motorola requires a little
> more care.
> 
> Here, custom table removal logic is required, so
> CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE is enabled for m68k-motorola.
> 
> Firstly as part of this change, the page table level must be communicated
> to the underlying __tlb_remove_table() implementation.
> 
> Take advantage of the fact that page tables are aligned by more than enough
> to permit setting TABLE_PTE or TABLE_PMD in the low bits of the pointer,
> and store this there.
> 
> Then update __pte_free_tlb() and __pmd_free_tlb() to pass this through,
> then have __tlb_remove_table() decode this and pass it to
> [ ... ]
> This forms part of an overall effort to switch every architecture to this
> mode.
> 
> Acked-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260911-rcu-pagetable-freeing-v3-0-7b8c86103821@kernel.org?part=9