[RFC PATCH 1/5] mm: Update ptep_modify_prot_start/commit to take vm_area_struct as arg
From: Aneesh Kumar K.V <hidden>
Date: 2018-09-24 09:05:02
Subsystem:
filesystems (vfs and infrastructure), generic include/asm header files, memory management, memory management - core, memory mapping, paravirt_ops interface, proc filesystem, s390 architecture, s390 mm, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Alexander Viro, Christian Brauner, Arnd Bergmann, Andrew Morton, David Hildenbrand, Liam R. Howlett, Lorenzo Stoakes, Juergen Gross, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Gerald Schaefer, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Some architecture may want to call flush_tlb_range from these helpers. Signed-off-by: Aneesh Kumar K.V <redacted> --- arch/s390/include/asm/pgtable.h | 4 ++-- arch/s390/mm/pgtable.c | 6 ++++-- arch/x86/include/asm/paravirt.h | 7 +++++-- fs/proc/task_mmu.c | 4 ++-- include/asm-generic/pgtable.h | 8 ++++---- mm/memory.c | 4 ++-- mm/mprotect.c | 4 ++-- 7 files changed, 21 insertions(+), 16 deletions(-)
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 0e7cb0dc9c33..8e7f26dfedc6 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h@@ -1035,8 +1035,8 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, } #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION -pte_t ptep_modify_prot_start(struct mm_struct *, unsigned long, pte_t *); -void ptep_modify_prot_commit(struct mm_struct *, unsigned long, pte_t *, pte_t); +pte_t ptep_modify_prot_start(struct vm_area_struct *, unsigned long, pte_t *); +void ptep_modify_prot_commit(struct vm_area_struct *, unsigned long, pte_t *, pte_t); #define __HAVE_ARCH_PTEP_CLEAR_FLUSH static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index f2cc7da473e4..29c0a21cd34a 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c@@ -301,12 +301,13 @@ pte_t ptep_xchg_lazy(struct mm_struct *mm, unsigned long addr, } EXPORT_SYMBOL(ptep_xchg_lazy); -pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, +pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { pgste_t pgste; pte_t old; int nodat; + struct mm_struct *mm = vma->vm_mm; preempt_disable(); pgste = ptep_xchg_start(mm, addr, ptep);
@@ -320,10 +321,11 @@ pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, } EXPORT_SYMBOL(ptep_modify_prot_start); -void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, +void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t pte) { pgste_t pgste; + struct mm_struct *mm = vma->vm_mm; if (!MACHINE_HAS_NX) pte_val(pte) &= ~_PAGE_NOEXEC;
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index e375d4266b53..c5d203a51e50 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h@@ -421,10 +421,11 @@ static inline pgdval_t pgd_val(pgd_t pgd) } #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION -static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, +static inline pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { pteval_t ret; + struct mm_struct *mm = vma->vm_mm; ret = PVOP_CALL3(pteval_t, pv_mmu_ops.ptep_modify_prot_start, mm, addr, ptep);
@@ -432,9 +433,11 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long a return (pte_t) { .pte = ret }; } -static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, +static inline void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t pte) { + struct mm_struct *mm = vma->vm_mm; + if (sizeof(pteval_t) > sizeof(long)) /* 5 arg words */ pv_mmu_ops.ptep_modify_prot_commit(mm, addr, ptep, pte);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 5ea1d64cb0b4..229df16e7ad0 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c@@ -938,10 +938,10 @@ static inline void clear_soft_dirty(struct vm_area_struct *vma, pte_t ptent = *pte; if (pte_present(ptent)) { - ptent = ptep_modify_prot_start(vma->vm_mm, addr, pte); + ptent = ptep_modify_prot_start(vma, addr, pte); ptent = pte_wrprotect(ptent); ptent = pte_clear_soft_dirty(ptent); - ptep_modify_prot_commit(vma->vm_mm, addr, pte, ptent); + ptep_modify_prot_commit(vma, addr, pte, ptent); } else if (is_swap_pte(ptent)) { ptent = pte_swp_clear_soft_dirty(ptent); set_pte_at(vma->vm_mm, addr, pte, ptent);
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 88ebc6102c7c..021b94cd3260 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h@@ -606,22 +606,22 @@ static inline void __ptep_modify_prot_commit(struct mm_struct *mm, * queue the update to be done at some later time. The update must be * actually committed before the pte lock is released, however. */ -static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, +static inline pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { - return __ptep_modify_prot_start(mm, addr, ptep); + return __ptep_modify_prot_start(vma->vm_mm, addr, ptep); } /* * Commit an update to a pte, leaving any hardware-controlled bits in * the PTE unmodified. */ -static inline void ptep_modify_prot_commit(struct mm_struct *mm, +static inline void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t pte) { - __ptep_modify_prot_commit(mm, addr, ptep, pte); + __ptep_modify_prot_commit(vma->vm_mm, addr, ptep, pte); } #endif /* __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION */ #endif /* CONFIG_MMU */
diff --git a/mm/memory.c b/mm/memory.c
index c467102a5cbc..261d30f51499 100644
--- a/mm/memory.c
+++ b/mm/memory.c@@ -3806,12 +3806,12 @@ static vm_fault_t do_numa_page(struct vm_fault *vmf) * Make it present again, Depending on how arch implementes non * accessible ptes, some can allow access by kernel mode. */ - pte = ptep_modify_prot_start(vma->vm_mm, vmf->address, vmf->pte); + pte = ptep_modify_prot_start(vma, vmf->address, vmf->pte); pte = pte_modify(pte, vma->vm_page_prot); pte = pte_mkyoung(pte); if (was_writable) pte = pte_mkwrite(pte); - ptep_modify_prot_commit(vma->vm_mm, vmf->address, vmf->pte, pte); + ptep_modify_prot_commit(vma, vmf->address, vmf->pte, pte); update_mmu_cache(vma, vmf->address, vmf->pte); page = vm_normal_page(vma, vmf->address, pte);
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 6d331620b9e5..a301d4c83d3c 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c@@ -110,7 +110,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, continue; } - ptent = ptep_modify_prot_start(mm, addr, pte); + ptent = ptep_modify_prot_start(vma, addr, pte); ptent = pte_modify(ptent, newprot); if (preserve_write) ptent = pte_mk_savedwrite(ptent);
@@ -121,7 +121,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, !(vma->vm_flags & VM_SOFTDIRTY))) { ptent = pte_mkwrite(ptent); } - ptep_modify_prot_commit(mm, addr, pte, ptent); + ptep_modify_prot_commit(vma, addr, pte, ptent); pages++; } else if (IS_ENABLED(CONFIG_MIGRATION)) { swp_entry_t entry = pte_to_swp_entry(oldpte);
--
2.17.1