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Commit f58c9df7 authored by Huang Ying's avatar Huang Ying Committed by Marcelo Tosatti
Browse files

mm: remove is_hwpoison_address 



Unused.

Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent fafc3dba

include/linux/mm.h

+0 −8
Original line number Diff line number Diff line
@@ -1625,14 +1625,6 @@ extern int sysctl_memory_failure_recovery; 
extern void shake_page(struct page *p, int access);

extern atomic_long_t mce_bad_pages;

extern int soft_offline_page(struct page *page, int flags);

#ifdef CONFIG_MEMORY_FAILURE

int is_hwpoison_address(unsigned long addr);

#else

static inline int is_hwpoison_address(unsigned long addr)

{

	return 0;

}

#endif



extern void dump_page(struct page *page);

mm/memory-failure.c

+0 −32
Original line number Diff line number Diff line
@@ -1487,35 +1487,3 @@ int soft_offline_page(struct page *page, int flags) 
	/* keep elevated page count for bad page */

	return ret;

}
 


/*

 * The caller must hold current->mm->mmap_sem in read mode.

 */

int is_hwpoison_address(unsigned long addr)

{

	pgd_t *pgdp;

	pud_t pud, *pudp;

	pmd_t pmd, *pmdp;

	pte_t pte, *ptep;

	swp_entry_t entry;



	pgdp = pgd_offset(current->mm, addr);

	if (!pgd_present(*pgdp))

		return 0;

	pudp = pud_offset(pgdp, addr);

	pud = *pudp;

	if (!pud_present(pud) || pud_large(pud))

		return 0;

	pmdp = pmd_offset(pudp, addr);

	pmd = *pmdp;

	if (!pmd_present(pmd) || pmd_large(pmd))

		return 0;

	ptep = pte_offset_map(pmdp, addr);

	pte = *ptep;

	pte_unmap(ptep);

	if (!is_swap_pte(pte))

		return 0;

	entry = pte_to_swp_entry(pte);

	return is_hwpoison_entry(entry);

}

EXPORT_SYMBOL_GPL(is_hwpoison_address);