* case, all we need to do here is to mark the page as writable and update
* any related book-keeping.
*/
-static inline void wp_page_reuse(struct vm_fault *vmf)
+static inline void wp_page_reuse(struct vm_fault *vmf, struct folio *folio)
__releases(vmf->ptl)
{
struct vm_area_struct *vma = vmf->vma;
pte_t entry;
VM_BUG_ON(!(vmf->flags & FAULT_FLAG_WRITE));
- VM_BUG_ON(page && PageAnon(page) && !PageAnonExclusive(page));
+ VM_BUG_ON(folio && folio_test_anon(folio) && !PageAnonExclusive(page));
/*
* Clear the pages cpupid information as the existing
* writeable once the page is prepared
*
* @vmf: structure describing the fault
+ * @folio: the folio of vmf->page
*
* This function handles all that is needed to finish a write page fault in a
* shared mapping due to PTE being read-only once the mapped page is prepared.
* Return: %0 on success, %VM_FAULT_NOPAGE when PTE got changed before
* we acquired PTE lock.
*/
-static vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf)
+static vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf, struct folio *folio)
{
WARN_ON_ONCE(!(vmf->vma->vm_flags & VM_SHARED));
vmf->pte = pte_offset_map_lock(vmf->vma->vm_mm, vmf->pmd, vmf->address,
pte_unmap_unlock(vmf->pte, vmf->ptl);
return VM_FAULT_NOPAGE;
}
- wp_page_reuse(vmf);
+ wp_page_reuse(vmf, folio);
return 0;
}
ret = vma->vm_ops->pfn_mkwrite(vmf);
if (ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))
return ret;
- return finish_mkwrite_fault(vmf);
+ return finish_mkwrite_fault(vmf, NULL);
}
- wp_page_reuse(vmf);
+ wp_page_reuse(vmf, NULL);
return 0;
}
folio_put(folio);
return tmp;
}
- tmp = finish_mkwrite_fault(vmf);
+ tmp = finish_mkwrite_fault(vmf, folio);
if (unlikely(tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) {
folio_unlock(folio);
folio_put(folio);
return tmp;
}
} else {
- wp_page_reuse(vmf);
+ wp_page_reuse(vmf, folio);
folio_lock(folio);
}
ret |= fault_dirty_shared_page(vmf);
pte_unmap_unlock(vmf->pte, vmf->ptl);
return 0;
}
- wp_page_reuse(vmf);
+ wp_page_reuse(vmf, folio);
return 0;
}
/*