mm: remove is_hwpoison_address

Unused.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

2 files changed, 0 insertions, 40 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index a77c82c56e05..78219887308e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -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);
 
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 0207c2f6f8bd..99ccb4472623 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1487,35 +1487,3 @@ done:
         /* 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);