函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\kasan\init.c Create Date:2022-07-27 17:25:40
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：zero_pmd_populate

函数原型：static int __ref zero_pmd_populate(pud_t *pud, unsigned long addr, unsigned long end)

返回类型：int

参数：

类型参数名称
pud_t *pud
unsigned longaddr
unsigned longend
116  pmd等于pmd_offset(pud, addr)
119  循环
120  next等于pmd_addr_end(addr, end)
122  如果IS_ALIGNED(addr, PMD_SIZE)且end减addr大于等于PMD_SIZE则
123  pmd_populate_kernel( & For dynamically allocated mm_structs, there is a dynamically sized cpumask* at the end of the structure, the size of which depends on the maximum CPU* number the system can see, pmd, lm_alias(kasan_early_shadow_pte))
125  继续下一循环
128  如果pmd_none( * pmd)则
131  如果slab_is_available()则p等于pte_alloc_one_kernel - allocate a page for PTE-level kernel page table*@mm: the mm_struct of the current context* Return: pointer to the allocated memory or %NULL on error
133  否则p等于early_alloc(PAGE_SIZE, NUMA_NO_NODE)
135  如果非p则返回:负ENOMEM
138  pmd_populate_kernel( & For dynamically allocated mm_structs, there is a dynamically sized cpumask* at the end of the structure, the size of which depends on the maximum CPU* number the system can see, pmd, p)
140  zero_pte_populate(pmd, addr, next)
141  当pmd自加, addr等于next, addr不等于end循环
143  返回:0
调用者
名称描述
zero_pud_populate