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sys/compat/linuxkpi/common/src/linux_page.c
| Show First 20 Lines • Show All 269 Lines • ▼ Show 20 Lines | return (linux_get_user_pages_internal(map, start, nr_pages, | ||||
| !!(gup_flags & FOLL_WRITE), pages)); | !!(gup_flags & FOLL_WRITE), pages)); | ||||
| } | } | ||||
| int | int | ||||
| is_vmalloc_addr(const void *addr) | is_vmalloc_addr(const void *addr) | ||||
| { | { | ||||
| return (vtoslab((vm_offset_t)addr & ~UMA_SLAB_MASK) != NULL); | return (vtoslab((vm_offset_t)addr & ~UMA_SLAB_MASK) != NULL); | ||||
| } | } | ||||
| vm_fault_t | |||||
| lkpi_vmf_insert_pfn_prot_locked(struct vm_area_struct *vma, unsigned long addr, | |||||
| unsigned long pfn, pgprot_t prot) | |||||
| { | |||||
| vm_object_t vm_obj = vma->vm_obj; | |||||
| vm_page_t page; | |||||
| vm_pindex_t pindex; | |||||
| VM_OBJECT_ASSERT_WLOCKED(vm_obj); | |||||
| pindex = OFF_TO_IDX(addr - vma->vm_start); | |||||
| if (vma->vm_pfn_count == 0) | |||||
| vma->vm_pfn_first = pindex; | |||||
| MPASS(pindex <= OFF_TO_IDX(vma->vm_end)); | |||||
| retry: | |||||
| page = vm_page_grab(vm_obj, pindex, VM_ALLOC_NOCREAT); | |||||
| if (page == NULL) { | |||||
| page = PHYS_TO_VM_PAGE(IDX_TO_OFF(pfn)); | |||||
| if (!vm_page_busy_acquire(page, VM_ALLOC_WAITFAIL)) | |||||
| goto retry; | |||||
| if (vm_page_insert(page, vm_obj, pindex)) { | |||||
| vm_page_xunbusy(page); | |||||
| return (VM_FAULT_OOM); | |||||
| } | |||||
| vm_page_valid(page); | |||||
| } | |||||
| pmap_page_set_memattr(page, pgprot2cachemode(prot)); | |||||
| vma->vm_pfn_count++; | |||||
| return (VM_FAULT_NOPAGE); | |||||
| } | |||||