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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2017-07-10 15:47:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-10 16:32:30 -0700
commitddd40d8a2c4ef8f2152ea6d227e11475cf7e5bfa (patch)
tree922caf132b05c7f93a6133a70552aa013daebb2c
parent78bb920344b8a6f04b79a7c254041723b931c94f (diff)
downloadlinux-ddd40d8a2c4ef8f2152ea6d227e11475cf7e5bfa.tar.bz2
mm: hugetlb: delete dequeue_hwpoisoned_huge_page()
dequeue_hwpoisoned_huge_page() is no longer used, so let's remove it. Link: http://lkml.kernel.org/r/1496305019-5493-9-git-send-email-n-horiguchi@ah.jp.nec.com Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/hugetlb.h5
-rw-r--r--mm/hugetlb.c34
-rw-r--r--mm/memory-failure.c11
3 files changed, 0 insertions, 50 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 668ab1742ef6..57f700ac127e 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -116,7 +116,6 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to,
vm_flags_t vm_flags);
long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
long freed);
-int dequeue_hwpoisoned_huge_page(struct page *page);
bool isolate_huge_page(struct page *page, struct list_head *list);
void putback_active_hugepage(struct page *page);
void free_huge_page(struct page *page);
@@ -192,10 +191,6 @@ static inline void hugetlb_show_meminfo(void)
#define hugetlb_mcopy_atomic_pte(dst_mm, dst_pte, dst_vma, dst_addr, \
src_addr, pagep) ({ BUG(); 0; })
#define huge_pte_offset(mm, address, sz) 0
-static inline int dequeue_hwpoisoned_huge_page(struct page *page)
-{
- return 0;
-}
static inline bool isolate_huge_page(struct page *page, struct list_head *list)
{
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index b2d44363837a..8254e8f6db6b 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4746,40 +4746,6 @@ follow_huge_pgd(struct mm_struct *mm, unsigned long address, pgd_t *pgd, int fla
return pte_page(*(pte_t *)pgd) + ((address & ~PGDIR_MASK) >> PAGE_SHIFT);
}
-#ifdef CONFIG_MEMORY_FAILURE
-
-/*
- * This function is called from memory failure code.
- */
-int dequeue_hwpoisoned_huge_page(struct page *hpage)
-{
- struct hstate *h = page_hstate(hpage);
- int nid = page_to_nid(hpage);
- int ret = -EBUSY;
-
- spin_lock(&hugetlb_lock);
- /*
- * Just checking !page_huge_active is not enough, because that could be
- * an isolated/hwpoisoned hugepage (which have >0 refcount).
- */
- if (!page_huge_active(hpage) && !page_count(hpage)) {
- /*
- * Hwpoisoned hugepage isn't linked to activelist or freelist,
- * but dangling hpage->lru can trigger list-debug warnings
- * (this happens when we call unpoison_memory() on it),
- * so let it point to itself with list_del_init().
- */
- list_del_init(&hpage->lru);
- set_page_refcounted(hpage);
- h->free_huge_pages--;
- h->free_huge_pages_node[nid]--;
- ret = 0;
- }
- spin_unlock(&hugetlb_lock);
- return ret;
-}
-#endif
-
bool isolate_huge_page(struct page *page, struct list_head *list)
{
bool ret = true;
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 6f8f69f4a986..2aec57c07652 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1458,17 +1458,6 @@ int unpoison_memory(unsigned long pfn)
}
if (!get_hwpoison_page(p)) {
- /*
- * Since HWPoisoned hugepage should have non-zero refcount,
- * race between memory failure and unpoison seems to happen.
- * In such case unpoison fails and memory failure runs
- * to the end.
- */
- if (PageHuge(page)) {
- unpoison_pr_info("Unpoison: Memory failure is now running on free hugepage %#lx\n",
- pfn, &unpoison_rs);
- return 0;
- }
if (TestClearPageHWPoison(p))
num_poisoned_pages_dec();
unpoison_pr_info("Unpoison: Software-unpoisoned free page %#lx\n",