函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\rmap.c Create Date:2022-07-27 16:25:38
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：page_referenced_one

函数原型：static bool page_referenced_one(struct page *page, struct vm_area_struct *vma, unsigned long address, void *arg)

返回类型：bool

参数：

类型参数名称
struct page *page
struct vm_area_struct *vma
unsigned longaddress
void *arg page_referenced_arg will be passed
777  pra等于 page_referenced_arg will be passed
778  struct page_vma_mapped_walk pvmw = {page = page, vma = vma, address = address, }
783  referenced等于0
785  当page_vma_mapped_walk - check if @pvmw->page is mapped in @pvmw->vma at*@pvmw->address*@pvmw: pointer to struct page_vma_mapped_walk. page, vma, address and flags* must be set. pmd, pte and ptl must be NULL.* Returns true if the page is mapped in the vma循环
786  address等于address
788  如果Flags, see mm.h. 按位与VM_LOCKED则
789  page_vma_mapped_walk_done( & pvmw)
790  vm_flags或等于VM_LOCKED
791  返回:false
794  如果pte则
795  如果ptep_clear_flush_young_notify(vma, address, pte)则
808  否则如果IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',* 0 otherwise.(CONFIG_TRANSPARENT_HUGEPAGE)则
809  如果pmdp_clear_flush_young_notify(vma, address, pmd)则referenced自加
812  否则
814  WARN_ON_ONCE(1)
817  mapcount自减
820  如果referenced则clear_page_idle(page)
822  如果test_and_clear_page_young(page)则referenced自加
825  如果referenced则
826  referenced自加
827  vm_flags或等于Flags, see mm.h.
830  如果非mapcount则返回:false
833  返回:true