is_huge_zero

函数名称：is_huge_zero_pmd

函数原型：static inline bool is_huge_zero_pmd(pmd_t pmd)

返回类型：bool

参数：

类型	参数	名称
pmd_t	pmd

**调用者**
名称	描述
vm_normal_page_pmd
madvise_cold_or_pageout_pte_range
insert_pfn_pmd
copy_huge_pmd
do_huge_pmd_wp_page
follow_trans_huge_pmd
madvise_free_huge_pmd	Return true if we do MADV_FREE successfully on entire pmd page.* Otherwise, return false.
zap_huge_pmd
change_huge_pmd	Returns* - 0 if PMD could not be locked* - 1 if PMD was locked but protections unchange and TLB flush unnecessary* - HPAGE_PMD_NR is protections changed and TLB flush necessary
__split_huge_pmd_locked

函数逻辑报告