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Date: Mon, 29 Jan 2024 01:01:00 -0800
From: Dennis Zhou <dennis@kernel.org>
To: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] riscv: Fix wrong size passed to
 local_flush_tlb_range_asid()
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References: <20240123132730.2297719-1-alexghiti@rivosinc.com>
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In-Reply-To: <20240123132730.2297719-1-alexghiti@rivosinc.com>

Hi Alexandre,

On Tue, Jan 23, 2024 at 02:27:30PM +0100, Alexandre Ghiti wrote:
> local_flush_tlb_range_asid() takes the size as argument, not the end of
> the range to flush, so fix this by computing the size from the end and
> the start of the range.
> 
> Fixes: 7a92fc8b4d20 ("mm: Introduce flush_cache_vmap_early()")
> Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
> ---
>  arch/riscv/mm/tlbflush.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c
> index 8d12b26f5ac3..9619965f6501 100644
> --- a/arch/riscv/mm/tlbflush.c
> +++ b/arch/riscv/mm/tlbflush.c
> @@ -68,7 +68,7 @@ static inline void local_flush_tlb_range_asid(unsigned long start,
>  
>  void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
>  {
> -	local_flush_tlb_range_asid(start, end, PAGE_SIZE, FLUSH_TLB_NO_ASID);
> +	local_flush_tlb_range_asid(start, end - start, PAGE_SIZE, FLUSH_TLB_NO_ASID);
>  }
>  
>  static void __ipi_flush_tlb_all(void *info)
> -- 
> 2.39.2
> 

Sorry for the delay, I just pulled this into percpu#for-6.8-fixes. I'll
send it to Linus this week.

Thanks,
Dennis