On 06/05/2024 09:46, Baolin Wang wrote:
> Move highest_order() and next_order() out of the CONFIG_TRANSPARENT_HUGEPAGE
> macro, which can be common functions to be used.
Sorry if I haven't kept up with the discussion, but why is this needed? I
wouldn't expect a need to iterate over orders if THP is compile-time disabled
because we will never try to allocate THP?
>
> Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
> ---
> include/linux/huge_mm.h | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
> index 017cee864080..e49b56c40a11 100644
> --- a/include/linux/huge_mm.h
> +++ b/include/linux/huge_mm.h
> @@ -106,6 +106,17 @@ extern struct kobj_attribute shmem_enabled_attr;
> #define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1))
> #define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT)
>
> +static inline int highest_order(unsigned long orders)
> +{
> + return fls_long(orders) - 1;
> +}
> +
> +static inline int next_order(unsigned long *orders, int prev)
> +{
> + *orders &= ~BIT(prev);
> + return highest_order(*orders);
> +}
> +
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
>
> extern unsigned long transparent_hugepage_flags;
> @@ -138,17 +149,6 @@ static inline bool hugepage_flags_enabled(void)
> huge_anon_orders_madvise;
> }
>
> -static inline int highest_order(unsigned long orders)
> -{
> - return fls_long(orders) - 1;
> -}
> -
> -static inline int next_order(unsigned long *orders, int prev)
> -{
> - *orders &= ~BIT(prev);
> - return highest_order(*orders);
> -}
> -
> /*
> * Do the below checks:
> * - For file vma, check if the linear page offset of vma is
