函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\mprotect.c Create Date:2022-07-27 16:20:34
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：change_pmd_range

函数原型：static inline unsigned long change_pmd_range(struct vm_area_struct *vma, pud_t *pud, unsigned long addr, unsigned long end, pgprot_t newprot, int dirty_accountable, int prot_numa)

返回类型：unsigned long

参数：

类型参数名称
struct vm_area_struct *vma
pud_t *pud
unsigned longaddr
unsigned longend
pgprot_tnewprot
intdirty_accountable
intprot_numa
195  pages等于0
196  nr_huge_updates等于0
199  start等于0
201  pmd等于pmd_offset(pud, addr)
202  循环
205  next等于pmd_addr_end(addr, end)
215  如果非is_swap_pmd( * pmd)且非pmd_devmap( * pmd)且Used when setting automatic NUMA hinting protection where it is* critical that a numa hinting PMD is not confused with a bad PMD.则转到:next
220  如果非start则
221  mmu_notifier_range_init( & range, MMU_NOTIFY_PROTECTION_VMA, 0, vma, The address space we belong to. , addr, end)
224  mmu_notifier_invalidate_range_start( & range)
227  如果is_swap_pmd( * pmd)或pmd_trans_huge( * pmd)或pmd_devmap( * pmd)则
228  如果next减addr不等于HPAGE_PMD_SIZE则
230  否则
231  nr_ptes等于change_huge_pmd(vma, pmd, addr, newprot, prot_numa)
234  如果nr_ptes则
235  如果nr_ptes恒等于HPAGE_PMD_NR则
236  pages加等于HPAGE_PMD_NR
237  nr_huge_updates自加
241  转到:next
246  this_pages等于change_pte_range(vma, pmd, addr, next, newprot, dirty_accountable, prot_numa)
248  pages加等于this_pages
249  :
250  cond_resched()
251  当pmd自加, addr等于next, addr不等于end循环
253  如果start则mmu_notifier_invalidate_range_end( & range)
256  如果nr_huge_updates则count_vm_numa_events(NUMA_HUGE_PTE_UPDATES, nr_huge_updates)
258  返回:pages
调用者
名称描述
change_pud_range