memcg: remove memcg->reclaim_param_lock

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / memory-failure.c

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 0207c2f..e0af336 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1130,7 +1130,7 @@ int __memory_failure(unsigned long pfn, int trapno, int flags)
 
        /*
         * Now take care of user space mappings.
-        * Abort on fail: __remove_from_page_cache() assumes unmapped page.
+        * Abort on fail: __delete_from_page_cache() assumes unmapped page.
         */
        if (hwpoison_user_mappings(p, pfn, trapno) != SWAP_SUCCESS) {
                printk(KERN_ERR "MCE %#lx: cannot unmap page, give up\n", pfn);
@@ -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);