Re: [PATCH v2 3/6] mm: pgtable: convert some architectures to use tlb_remove_ptdesc()

[Qi Zheng <zhengqi.arch@bytedance.com>]

On 2/27/25 9:21 PM, Geert Uytterhoeven wrote:
> Hi Qi,
> 
> On Tue, 25 Feb 2025 at 04:46, Qi Zheng <zhengqi.arch@bytedance.com> wrote:
>> Now, the nine architectures of csky, hexagon, loongarch, m68k, mips,
>> nios2, openrisc, sh and um do not select CONFIG_MMU_GATHER_RCU_TABLE_FREE,
>> and just call pagetable_dtor() + tlb_remove_page_ptdesc() (the wrapper of
>> tlb_remove_page()). This is the same as the implementation of
>> tlb_remove_{ptdesc|table}() under !CONFIG_MMU_GATHER_TABLE_FREE, so
>> convert these architectures to use tlb_remove_ptdesc().
>>
>> The ultimate goal is to make the architecture only use tlb_remove_ptdesc()
>> or tlb_remove_table() for page table pages.
>>
>> Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
>> Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> 
> Thanks for your patch!
> 
>>   arch/m68k/include/asm/sun3_pgalloc.h | 3 +--
> 
> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k

Thanks for your review.

> 
>> --- a/arch/m68k/include/asm/sun3_pgalloc.h
>> +++ b/arch/m68k/include/asm/sun3_pgalloc.h
>> @@ -19,8 +19,7 @@ extern const char bad_pmd_string[];
>>
>>   #define __pte_free_tlb(tlb, pte, addr)                         \
>>   do {                                                           \
>> -       pagetable_dtor(page_ptdesc(pte));                       \
>> -       tlb_remove_page_ptdesc((tlb), page_ptdesc(pte));        \
>> +       tlb_remove_ptdesc((tlb), page_ptdesc(pte));             \
>>   } while (0)
>>
> 
> With only a single statement remaining, you can remove the do { ... }
> while construct, too.

Ah, right. Will do in the next version.

Thanks!

> 
> Gr{oetje,eeting}s,
> 
>                          Geert
>