Re: [PATCH v2 11/12] mm: make userland page table freeing RCU-safe

[sashiko-bot@kernel.org]

> Now every architecture has been converted to support
> CONFIG_MMU_GATHER_RCU_TABLE_FREE, this configuration option no longer makes
> any sense to keep around.
> 
> Therefore remove it, and remove all the dead code that existed for
> !CONFIG_MMU_GATHER_RCU_TABLE_FREE architectures previously.
> 
> Additionally, CONFIG_MMU_GATHER_TABLE_FREE is no longer necessary, as all
> architectures instead use CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE when a custom
> __tlb_remove_table() is required, so remove this too.
> 
> A number of architectures only enabled CONFIG_MMU_GATHER_RCU_TABLE_FREE if
> CONFIG_MMU was set, however the mmu_gather logic only actually does
> something meaningful if CONFIG_MMU is set (mmu_gather.c is only compiled in
> this case, for instance).
> [ ... ]
> This is all that is guaranteed, however, so naturally it is still incumbent
> upon page table walkers to ensure that the page table entries are as
> expected.
> 
> 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/20260908-rcu-pagetable-freeing-v2-0-1f60b64e878e@kernel.org?part=11