maybe_mkwrite

函数名称：Do pte_mkwrite, but only if the vma says VM_WRITE. We do this when* servicing faults for write access. In the normal case, do always want* pte_mkwrite. But get_user_pages can cause write faults for mappings

函数原型：static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma)

返回类型：pte_t

参数：

类型	参数	名称
pte_t	pte
struct vm_area_struct *	vma

**调用者**
名称	描述
insert_pfn
wp_page_reuse	Handle write page faults for pages that can be reused in the current vma* This can happen either due to the mapping being with the VM_SHARED flag,* or due to us being the last reference standing to the page
wp_page_copy	Handle the case of a page which we actually need to copy to a new page.* Called with mmap_sem locked and the old page referenced, but* without the ptl held.* High level logic flow:* - Allocate a page, copy the content of the old page to the new one.
do_swap_page	We enter with non-exclusive mmap_sem (to exclude vma changes,* but allow concurrent faults), and pte mapped but not yet locked.* We return with pte unmapped and unlocked.* We return with the mmap_sem locked or unlocked in the same cases
alloc_set_pte	alloc_set_pte - setup new PTE entry for given page and add reverse page* mapping
remove_migration_pte	Restore a potential migration pte to a working pte entry
do_huge_pmd_wp_page_fallback
__split_huge_pmd_locked

函数逻辑报告