mm/hwpoison: replace most of put_page in memory error handling by put_hwpoison_page

Replace most instances of put_page() in memory error handling with
put_hwpoison_page().

Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: 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>

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 5ceb825..5420d38 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1174,9 +1174,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
                                pr_err("MCE: %#lx: thp split failed\n", pfn);
                        if (TestClearPageHWPoison(p))
                                atomic_long_sub(nr_pages, &num_poisoned_pages);
-                       put_page(p);
-                       if (p != hpage)
-                               put_page(hpage);
+                       put_hwpoison_page(p);
                        return -EBUSY;
                }
                VM_BUG_ON_PAGE(!page_count(p), p);
@@ -1237,14 +1235,14 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
                printk(KERN_ERR "MCE %#lx: just unpoisoned\n", pfn);
                atomic_long_sub(nr_pages, &num_poisoned_pages);
                unlock_page(hpage);
-               put_page(hpage);
+               put_hwpoison_page(hpage);
                return 0;
        }
        if (hwpoison_filter(p)) {
                if (TestClearPageHWPoison(p))
                        atomic_long_sub(nr_pages, &num_poisoned_pages);
                unlock_page(hpage);
-               put_page(hpage);
+               put_hwpoison_page(hpage);
                return 0;
        }
 
@@ -1258,7 +1256,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
        if (PageHuge(p) && PageTail(p) && TestSetPageHWPoison(hpage)) {
                action_result(pfn, MF_MSG_POISONED_HUGE, MF_IGNORED);
                unlock_page(hpage);
-               put_page(hpage);
+               put_hwpoison_page(hpage);
                return 0;
        }
        /*
@@ -1492,9 +1490,9 @@ int unpoison_memory(unsigned long pfn)
        }
        unlock_page(page);
 
-       put_page(page);
+       put_hwpoison_page(page);
        if (freeit && !(pfn == my_zero_pfn(0) && page_count(p) == 1))
-               put_page(page);
+               put_hwpoison_page(page);
 
        return 0;
 }
@@ -1554,7 +1552,7 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
                /*
                 * Try to free it.
                 */
-               put_page(page);
+               put_hwpoison_page(page);
                shake_page(page, 1);
 
                /*
@@ -1563,7 +1561,7 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
                ret = __get_any_page(page, pfn, 0);
                if (!PageLRU(page)) {
                        /* Drop page reference which is from __get_any_page() */
-                       put_page(page);
+                       put_hwpoison_page(page);
                        pr_info("soft_offline: %#lx: unknown non LRU page type %lx\n",
                                pfn, page->flags);
                        return -EIO;
@@ -1586,7 +1584,7 @@ static int soft_offline_huge_page(struct page *page, int flags)
        lock_page(hpage);
        if (PageHWPoison(hpage)) {
                unlock_page(hpage);
-               put_page(hpage);
+               put_hwpoison_page(hpage);
                pr_info("soft offline: %#lx hugepage already poisoned\n", pfn);
                return -EBUSY;
        }
@@ -1597,7 +1595,7 @@ static int soft_offline_huge_page(struct page *page, int flags)
         * get_any_page() and isolate_huge_page() takes a refcount each,
         * so need to drop one here.
         */
-       put_page(hpage);
+       put_hwpoison_page(hpage);
        if (!ret) {
                pr_info("soft offline: %#lx hugepage failed to isolate\n", pfn);
                return -EBUSY;
@@ -1646,7 +1644,7 @@ static int __soft_offline_page(struct page *page, int flags)
        wait_on_page_writeback(page);
        if (PageHWPoison(page)) {
                unlock_page(page);
-               put_page(page);
+               put_hwpoison_page(page);
                pr_info("soft offline: %#lx page already poisoned\n", pfn);
                return -EBUSY;
        }
@@ -1661,7 +1659,7 @@ static int __soft_offline_page(struct page *page, int flags)
         * would need to fix isolation locking first.
         */
        if (ret == 1) {
-               put_page(page);
+               put_hwpoison_page(page);
                pr_info("soft_offline: %#lx: invalidated\n", pfn);
                SetPageHWPoison(page);
                atomic_long_inc(&num_poisoned_pages);
@@ -1678,7 +1676,7 @@ static int __soft_offline_page(struct page *page, int flags)
         * Drop page reference which is came from get_any_page()
         * successful isolate_lru_page() already took another one.
         */
-       put_page(page);
+       put_hwpoison_page(page);
        if (!ret) {
                LIST_HEAD(pagelist);
                inc_zone_page_state(page, NR_ISOLATED_ANON +
@@ -1741,7 +1739,7 @@ int soft_offline_page(struct page *page, int flags)
        if (PageHWPoison(page)) {
                pr_info("soft offline: %#lx page already poisoned\n", pfn);
                if (flags & MF_COUNT_INCREASED)
-                       put_page(page);
+                       put_hwpoison_page(page);
                return -EBUSY;
        }
        if (!PageHuge(page) && PageTransHuge(hpage)) {
@@ -1749,7 +1747,7 @@ int soft_offline_page(struct page *page, int flags)
                        pr_info("soft offline: %#lx: failed to split THP\n",
                                pfn);
                        if (flags & MF_COUNT_INCREASED)
-                               put_page(page);
+                               put_hwpoison_page(page);
                        return -EBUSY;
                }
        }