pagemap: add #ifdefs CONFIG_HUGETLB_PAGE on code walking hugetlb vma (1a5cb814) · Commits · 戴 / test

If !CONFIG_HUGETLB_PAGE, pagemap_hugetlb_range() is never called. So put it (and its calling function) into #ifdef block. Signed-off-by:

fs/proc/task_mmu.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -634,6 +634,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
		return err;
		}

		#ifdef CONFIG_HUGETLB_PAGE
		static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
		{
		u64 pme = 0;
		@@ -664,6 +665,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,

		return err;
		}
		#endif /* HUGETLB_PAGE */

		/*
		* /proc/pid/pagemap - an array mapping virtual pages to pfns
		@@ -733,7 +735,9 @@ static ssize_t pagemap_read(struct file file, char __user buf,

		pagemap_walk.pmd_entry = pagemap_pte_range;
		pagemap_walk.pte_hole = pagemap_pte_hole;
		#ifdef CONFIG_HUGETLB_PAGE
		pagemap_walk.hugetlb_entry = pagemap_hugetlb_range;
		#endif
		pagemap_walk.mm = mm;
		pagemap_walk.private = &pm;