[PATCH v4 08/34] mm: Convert ptlock_ptr() to use ptdescs
From: Vishal Moola (Oracle) <hidden>
Date: 2023-06-12 21:05:06
Also in:
kvm, linux-arch, linux-arm-kernel, linux-m68k, linux-mips, linux-mm, linux-riscv, linux-s390, linux-sh, linuxppc-dev, loongarch, sparclinux, xen-devel
Subsystem:
memory management - core, the rest, x86 architecture (32-bit and 64-bit), xen hypervisor x86 · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, Juergen Gross
This removes some direct accesses to struct page, working towards splitting out struct ptdesc from struct page. Signed-off-by: Vishal Moola (Oracle) <redacted> --- 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
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