函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\memory.c Create Date:2022-07-27 16:09:13
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：sh_mkwrite_fault - finish page fault for a shared mapping, making PTE* writeable once the page is prepared*@vmf: structure describing the fault* This function handles all that is needed to finish a write page fault in a

函数原型：vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf)

返回类型：vm_fault_t

参数：

类型参数名称
struct vm_fault *vmf
2625  WARN_ON_ONCE(!(Flags, see mm.h. & VM_SHARED))
2626  Pointer to pte entry matching* the 'address'. NULL if the page* table hasn't been allocated.等于pte_offset_map_lock(The address space we belong to. , Pointer to pmd entry matching* the 'address' , Faulting virtual address , & Page table lock.* Protects pte page table if 'pte'* is not NULL, otherwise pmd.)
2632  如果非pte_same( * Pointer to pte entry matching* the 'address'. NULL if the page* table hasn't been allocated., Value of PTE at the time of fault )则
2633  pte_unmap_unlock(Pointer to pte entry matching* the 'address'. NULL if the page* table hasn't been allocated., Page table lock.* Protects pte page table if 'pte'* is not NULL, otherwise pmd.)
2634  返回:VM_FAULT_NOPAGE
2636  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
2637  返回:0
调用者
名称描述
wp_pfn_sharedHandle write page faults for VM_MIXEDMAP or VM_PFNMAP for a VM_SHARED* mapping
wp_page_shared