On Mon, Jun 12, 2023 at 02:03:57PM -0700, Vishal Moola (Oracle) wrote:
> This removes some direct accesses to struct page, working towards
> splitting out struct ptdesc from struct page.
>
> Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Acked-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
> ---
> arch/x86/xen/mmu_pv.c | 2 +-
> include/linux/mm.h | 14 +++++++-------
> 2 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
> index b3b8d289b9ab..f469862e3ef4 100644
> --- a/arch/x86/xen/mmu_pv.c
> +++ b/arch/x86/xen/mmu_pv.c
> @@ -651,7 +651,7 @@ static spinlock_t *xen_pte_lock(struct page *page, struct mm_struct *mm)
> spinlock_t *ptl = NULL;
>
> #if USE_SPLIT_PTE_PTLOCKS
> - ptl = ptlock_ptr(page);
> + ptl = ptlock_ptr(page_ptdesc(page));
> spin_lock_nest_lock(ptl, &mm->page_table_lock);
> #endif
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index e6f1be2a405e..bb934d51390f 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2828,9 +2828,9 @@ void __init ptlock_cache_init(void);
> bool ptlock_alloc(struct ptdesc *ptdesc);
> extern void ptlock_free(struct page *page);
>
> -static inline spinlock_t *ptlock_ptr(struct page *page)
> +static inline spinlock_t *ptlock_ptr(struct ptdesc *ptdesc)
> {
> - return page->ptl;
> + return ptdesc->ptl;
> }
> #else /* ALLOC_SPLIT_PTLOCKS */
> static inline void ptlock_cache_init(void)
> @@ -2846,15 +2846,15 @@ static inline void ptlock_free(struct page *page)
> {
> }
>
> -static inline spinlock_t *ptlock_ptr(struct page *page)
> +static inline spinlock_t *ptlock_ptr(struct ptdesc *ptdesc)
> {
> - return &page->ptl;
> + return &ptdesc->ptl;
> }
> #endif /* ALLOC_SPLIT_PTLOCKS */
>
> static inline spinlock_t *pte_lockptr(struct mm_struct *mm, pmd_t *pmd)
> {
> - return ptlock_ptr(pmd_page(*pmd));
> + return ptlock_ptr(page_ptdesc(pmd_page(*pmd)));
> }
>
> static inline bool ptlock_init(struct page *page)
> @@ -2869,7 +2869,7 @@ static inline bool ptlock_init(struct page *page)
> VM_BUG_ON_PAGE(*(unsigned long *)&page->ptl, page);
> if (!ptlock_alloc(page_ptdesc(page)))
> return false;
> - spin_lock_init(ptlock_ptr(page));
> + spin_lock_init(ptlock_ptr(page_ptdesc(page)));
> return true;
> }
>
> @@ -2939,7 +2939,7 @@ static inline struct ptdesc *pmd_ptdesc(pmd_t *pmd)
>
> static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd)
> {
> - return ptlock_ptr(ptdesc_page(pmd_ptdesc(pmd)));
> + return ptlock_ptr(pmd_ptdesc(pmd));
> }
>
> static inline bool pmd_ptlock_init(struct page *page)
> --
> 2.40.1
>
>
--
Sincerely yours,
Mike.
