[PATCH 06/10] arm64: mm: Simplify __TLBI_RANGE_NUM() macro
Ryan Roberts
ryan.roberts at arm.com
Mon Jul 14 02:06:20 PDT 2025
On 11/07/2025 17:17, Will Deacon wrote:
> Since commit e2768b798a19 ("arm64/mm: Modify range-based tlbi to
> decrement scale"), we don't need to clamp the 'pages' argument to fit
> the range for the specified 'scale' as we know that the upper bits will
> have been processed in a prior iteration.
>
> Drop the clamping and simplify the __TLBI_RANGE_NUM() macro.
>
> Signed-off-by: Will Deacon <will at kernel.org>
Seems reasonable:
Reviewed-by: Ryan Roberts <ryan.roberts at arm.com>
> ---
> arch/arm64/include/asm/tlbflush.h | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h
> index ddd77e92b268..a8d21e52ef3a 100644
> --- a/arch/arm64/include/asm/tlbflush.h
> +++ b/arch/arm64/include/asm/tlbflush.h
> @@ -205,11 +205,7 @@ static __always_inline void __tlbi_level(const enum tlbi_op op, u64 addr, u32 le
> * range.
> */
> #define __TLBI_RANGE_NUM(pages, scale) \
> - ({ \
> - int __pages = min((pages), \
> - __TLBI_RANGE_PAGES(31, (scale))); \
> - (__pages >> (5 * (scale) + 1)) - 1; \
> - })
> + (((pages) >> (5 * (scale) + 1)) - 1)
>
> /*
> * TLB Invalidation
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