dma-debug: avoid spinlock recursion when disabling dma-debug

[firefly-linux-kernel-4.4.55.git] / mm / migrate.c

diff --git a/mm/migrate.c b/mm/migrate.c
index 6d17e0ab42d40f3253df41bbecc1e0d85acb204b..bbeb0b71fcf41b99a0173ba8dbb5990190fb59ce 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -963,7 +963,13 @@ out:
                dec_zone_page_state(page, NR_ISOLATED_ANON +
                                page_is_file_cache(page));
                /* Soft-offlined page shouldn't go through lru cache list */
-               if (reason == MR_MEMORY_FAILURE) {
+               if (reason == MR_MEMORY_FAILURE && rc == MIGRATEPAGE_SUCCESS) {
+                       /*
+                        * With this release, we free successfully migrated
+                        * page and set PG_HWPoison on just freed page
+                        * intentionally. Although it's rather weird, it's how
+                        * HWPoison flag works at the moment.
+                        */
                        put_page(page);
                        if (!test_set_page_hwpoison(page))
                                num_poisoned_pages_inc();