Re: [PATCH 4/6] riscv: remove unreachable invalid range check in kasan_init()

[Charlie Jenkins <thecharlesjenkins@gmail.com>]

On Sun, Jun 21, 2026 at 11:59:14PM +0900, Sang-Heon Jeon wrote:
> kasan_init() populates the linear mapping shadow with for_each_mem_range()
> and breaks the loop when start >= end. for_each_mem_range() never returns
> an invalid range, so start < end always.
> 
> Therefore the start >= end check is unreachable, so remove it.
> 
> No functional change.
> 
> Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>

Reviewed-by: Charlie Jenkins <thecharlesjenkins@gmail.com>
Tested-by: Charlie Jenkins <thecharlesjenkins@gmail.com>

> ---
>  arch/riscv/mm/kasan_init.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c
> index c4a2a9e5586e..1f3aa9611187 100644
> --- a/arch/riscv/mm/kasan_init.c
> +++ b/arch/riscv/mm/kasan_init.c
> @@ -512,9 +512,6 @@ void __init kasan_init(void)
>  		void *start = (void *)__va(p_start);
>  		void *end = (void *)__va(p_end);
>  
> -		if (start >= end)
> -			break;
> -
>  		kasan_populate(kasan_mem_to_shadow(start), kasan_mem_to_shadow(end));
>  	}
>  
> -- 
> 2.43.0
> 
> 
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