mm/migration: return errno when isolate_huge_page failed

[linux-2.6-microblaze.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index b36a4ef..dd9a46c 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2766,8 +2766,7 @@ retry:
                 * Fail with -EBUSY if not possible.
                 */
                spin_unlock_irq(&hugetlb_lock);
-               if (!isolate_huge_page(old_page, list))
-                       ret = -EBUSY;
+               ret = isolate_hugetlb(old_page, list);
                spin_lock_irq(&hugetlb_lock);
                goto free_new;
        } else if (!HPageFreed(old_page)) {
@@ -2843,7 +2842,7 @@ int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list)
        if (hstate_is_gigantic(h))
                return -ENOMEM;
 
-       if (page_count(head) && isolate_huge_page(head, list))
+       if (page_count(head) && !isolate_hugetlb(head, list))
                ret = 0;
        else if (!page_count(head))
                ret = alloc_and_dissolve_huge_page(h, head, list);
@@ -6960,15 +6959,15 @@ 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);
 }
 
-bool isolate_huge_page(struct page *page, struct list_head *list)
+int isolate_hugetlb(struct page *page, struct list_head *list)
 {
-       bool ret = true;
+       int ret = 0;
 
        spin_lock_irq(&hugetlb_lock);
        if (!PageHeadHuge(page) ||
            !HPageMigratable(page) ||
            !get_page_unless_zero(page)) {
-               ret = false;
+               ret = -EBUSY;
                goto unlock;
        }
        ClearHPageMigratable(page);