Re: [PATCH] hugetlb: Add guard support

[David Hildenbrand (Red Hat)]

On 11/28/25 12:02, Fushuai Wang wrote:
> Introduce guard support to simplify the usage of the
> hugetlb_vma_{lock,unlock}_{read,write}.
>
> Signed-off-by: Fushuai Wang <wangfushuai@xxxxxxxxx>
> ---
>   include/linux/hugetlb.h | 8 ++++++++
>   1 file changed, 8 insertions(+)
>
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index 8e63e46b8e1f..f97cb2f123a3 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -15,6 +15,7 @@
>   #include <linux/gfp.h>
>   #include <linux/userfaultfd_k.h>
>   #include <linux/nodemask.h>
> +#include <linux/cleanup.h>
>   
>   struct ctl_table;
>   struct user_struct;
> @@ -468,6 +469,13 @@ static inline void hugetlb_split(struct vm_area_struct *vma, unsigned long addr)
>   
>   #endif /* !CONFIG_HUGETLB_PAGE */
>   
> +DEFINE_GUARD(hugetlb_vma_read, struct vm_area_struct *,
> +	     hugetlb_vma_lock_read(_T), hugetlb_vma_unlock_read(_T))
> +
> +DEFINE_GUARD(hugetlb_vma_write, struct vm_area_struct *,
> +	     hugetlb_vma_lock_write(_T), hugetlb_vma_unlock_write(_T))
> +DEFINE_GUARD_COND(hugetlb_vma_write, _try, hugetlb_vma_trylock_write(_T))

Do I understand correctly that the code you are introducing does not 
have any users?

--
Cheers

David