Re: [PATCH v2 08/13] arm64: mm: Simplify __flush_tlb_range_limit_excess()

[Jonathan Cameron]

On Mon, 19 Jan 2026 17:21:55 +0000
Ryan Roberts <ryan.roberts@xxxxxxx> wrote:

> From: Will Deacon <will@xxxxxxxxxx>
> 
> __flush_tlb_range_limit_excess() is unnecessarily complicated:
> 
>   - It takes a 'start', 'end' and 'pages' argument, whereas it only
>     needs 'pages' (which the caller has computed from the other two
>     arguments!).
> 
>   - It erroneously compares 'pages' with MAX_TLBI_RANGE_PAGES when
>     the system doesn't support range-based invalidation but the range to
>     be invalidated would result in fewer than MAX_DVM_OPS invalidations.
> 
> Simplify the function so that it no longer takes the 'start' and 'end'
> arguments and only considers the MAX_TLBI_RANGE_PAGES threshold on
> systems that implement range-based invalidation.
> 
> Signed-off-by: Will Deacon <will@xxxxxxxxxx>
> Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>