[PATCH] um: tlb: Remove unused flush_tlb_mm_range function

[Tiwei Bie]

On 4/15/24 5:19 AM, Ivan Orlov wrote:
> GCC 11.4.0 produces the following warning when compiling the kernel for
> UML architecture (with UML defconfig):
> 
> arch/um/kernel/tlb.c:579:6: warning: no previous prototype for ‘flush_tlb_mm_range’ [-Wmissing-prototypes]
>   579 | void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,)
> 
> This function is not used anywhere. It is not exported with
> `EXPORT_SYMBOL` either, and therefore it is not usable for dynamically
> loaded modules. Remove this function.
> 
> Signed-off-by: Ivan Orlov <ivan.orlov0322 at gmail.com>
> ---
>  arch/um/kernel/tlb.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
> index 7d050ab0f78a..70b5e47e9761 100644
> --- a/arch/um/kernel/tlb.c
> +++ b/arch/um/kernel/tlb.c
> @@ -576,12 +576,6 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
>  }
>  EXPORT_SYMBOL(flush_tlb_range);
>  
> -void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
> -			unsigned long end)
> -{
> -	fix_range(mm, start, end, 0);
> -}
> -
>  void flush_tlb_mm(struct mm_struct *mm)
>  {
>  	struct vm_area_struct *vma;

Thanks for the patch. I also posted a fix for this earlier (but not merged yet):

https://lore.kernel.org/linux-um/20240306101925.1088870-4-tiwei.btw@antgroup.com/

Regards,
Tiwei