mm/memory-failure.c-failure: send right signal code to correct thread

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

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 2f2f34a..4a2cba6 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -208,9 +208,9 @@ static int kill_proc(struct task_struct *t, unsigned long addr, int trapno,
 #endif
        si.si_addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT;
 
-       if ((flags & MF_ACTION_REQUIRED) && t == current) {
+       if ((flags & MF_ACTION_REQUIRED) && t->mm == current->mm) {
                si.si_code = BUS_MCEERR_AR;
-               ret = force_sig_info(SIGBUS, &si, t);
+               ret = force_sig_info(SIGBUS, &si, current);
        } else {
                /*
                 * Don't use force here, it's convenient if the signal
@@ -1085,15 +1085,16 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
                        return 0;
                } else if (PageHuge(hpage)) {
                        /*
-                        * Check "just unpoisoned", "filter hit", and
-                        * "race with other subpage."
+                        * Check "filter hit" and "race with other subpage."
                         */
                        lock_page(hpage);
-                       if (!PageHWPoison(hpage)
-                           || (hwpoison_filter(p) && TestClearPageHWPoison(p))
-                           || (p != hpage && TestSetPageHWPoison(hpage))) {
-                               atomic_long_sub(nr_pages, &num_poisoned_pages);
-                               return 0;
+                       if (PageHWPoison(hpage)) {
+                               if ((hwpoison_filter(p) && TestClearPageHWPoison(p))
+                                   || (p != hpage && TestSetPageHWPoison(hpage))) {
+                                       atomic_long_sub(nr_pages, &num_poisoned_pages);
+                                       unlock_page(hpage);
+                                       return 0;
+                               }
                        }
                        set_page_hwpoison_huge_page(hpage);
                        res = dequeue_hwpoisoned_huge_page(hpage);
@@ -1156,6 +1157,8 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
         */
        if (!PageHWPoison(p)) {
                printk(KERN_ERR "MCE %#lx: just unpoisoned\n", pfn);
+               atomic_long_sub(nr_pages, &num_poisoned_pages);
+               put_page(hpage);
                res = 0;
                goto out;
        }
@@ -1651,7 +1654,7 @@ int soft_offline_page(struct page *page, int flags)
 {
        int ret;
        unsigned long pfn = page_to_pfn(page);
-       struct page *hpage = compound_trans_head(page);
+       struct page *hpage = compound_head(page);
 
        if (PageHWPoison(page)) {
                pr_info("soft offline: %#lx page already poisoned\n", pfn);