From: Thomas Hellstrom <thellstrom@xxxxxxxxxx> For graphics drivers needing to modify the page-protection, add huge page-table entries counterparts to vmf_insert_prn_prot(). Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxx> Cc: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> Cc: Ralph Campbell <rcampbell@xxxxxxxxxx> Cc: "Jérôme Glisse" <jglisse@xxxxxxxxxx> Cc: "Christian König" <christian.koenig@xxxxxxx> Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx> --- include/linux/huge_mm.h | 17 +++++++++++++++-- mm/huge_memory.c | 12 ++++++------ 2 files changed, 21 insertions(+), 8 deletions(-) diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 93d5cf0bc716..f53507203b5e 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -47,8 +47,21 @@ extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, pgprot_t newprot, int prot_numa); -vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, bool write); -vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, bool write); +vm_fault_t vmf_insert_pfn_pmd_prot(struct vm_fault *vmf, pfn_t pfn, + pgprot_t pgprot, bool write); +static inline vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, + bool write) +{ + return vmf_insert_pfn_pmd_prot(vmf, pfn, vmf->vma->vm_page_prot, write); +} +vm_fault_t vmf_insert_pfn_pud_prot(struct vm_fault *vmf, pfn_t pfn, + pgprot_t pgprot, bool write); +static inline vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, + bool write) +{ + return vmf_insert_pfn_pud_prot(vmf, pfn, vmf->vma->vm_page_prot, write); +} + enum transparent_hugepage_flag { TRANSPARENT_HUGEPAGE_FLAG, TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 3c83467f09b2..bbc6b1aa040a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -811,11 +811,11 @@ static void insert_pfn_pmd(struct vm_area_struct *vma, unsigned long addr, pte_free(mm, pgtable); } -vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, bool write) +vm_fault_t vmf_insert_pfn_pmd_prot(struct vm_fault *vmf, pfn_t pfn, + pgprot_t pgprot, bool write) { unsigned long addr = vmf->address & PMD_MASK; struct vm_area_struct *vma = vmf->vma; - pgprot_t pgprot = vma->vm_page_prot; pgtable_t pgtable = NULL; /* @@ -843,7 +843,7 @@ vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, bool write) insert_pfn_pmd(vma, addr, vmf->pmd, pfn, pgprot, write, pgtable); return VM_FAULT_NOPAGE; } -EXPORT_SYMBOL_GPL(vmf_insert_pfn_pmd); +EXPORT_SYMBOL_GPL(vmf_insert_pfn_pmd_prot); #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD static pud_t maybe_pud_mkwrite(pud_t pud, struct vm_area_struct *vma) @@ -889,11 +889,11 @@ static void insert_pfn_pud(struct vm_area_struct *vma, unsigned long addr, spin_unlock(ptl); } -vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, bool write) +vm_fault_t vmf_insert_pfn_pud_prot(struct vm_fault *vmf, pfn_t pfn, + pgprot_t pgprot, bool write) { unsigned long addr = vmf->address & PUD_MASK; struct vm_area_struct *vma = vmf->vma; - pgprot_t pgprot = vma->vm_page_prot; /* * If we had pud_special, we could avoid all these restrictions, @@ -914,7 +914,7 @@ vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, bool write) insert_pfn_pud(vma, addr, vmf->pud, pfn, pgprot, write); return VM_FAULT_NOPAGE; } -EXPORT_SYMBOL_GPL(vmf_insert_pfn_pud); +EXPORT_SYMBOL_GPL(vmf_insert_pfn_pud_prot); #endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ static void touch_pmd(struct vm_area_struct *vma, unsigned long addr, -- 2.21.0