h63xx: nfs mount works, gpe image boots to ts config screen.

[linux-2.6-omap-h63xx.git] / mm / mlock.c

diff --git a/mm/mlock.c b/mm/mlock.c
index 008ea70b7afa9a2baed56cdc9b6b43ef0b05a6ff..1ada366570cb535e4a281f7d526829c708f320f3 100644 (file)
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -66,14 +66,10 @@ void __clear_page_mlock(struct page *page)
                putback_lru_page(page);
        } else {
                /*
-                * Page not on the LRU yet.  Flush all pagevecs and retry.
+                * We lost the race. the page already moved to evictable list.
                 */
-               lru_add_drain_all();
-               if (!isolate_lru_page(page))
-                       putback_lru_page(page);
-               else if (PageUnevictable(page))
+               if (PageUnevictable(page))
                        count_vm_event(UNEVICTABLE_PGSTRANDED);
-
        }
 }
 
@@ -166,7 +162,7 @@ static long __mlock_vma_pages_range(struct vm_area_struct *vma,
        unsigned long addr = start;
        struct page *pages[16]; /* 16 gives a reasonable batch */
        int nr_pages = (end - start) / PAGE_SIZE;
-       int ret;
+       int ret = 0;
        int gup_flags = 0;
 
        VM_BUG_ON(start & ~PAGE_MASK);
@@ -187,8 +183,6 @@ static long __mlock_vma_pages_range(struct vm_area_struct *vma,
        if (vma->vm_flags & VM_WRITE)
                gup_flags |= GUP_FLAGS_WRITE;
 
-       lru_add_drain_all();    /* push cached pages to LRU */
-
        while (nr_pages > 0) {
                int i;
 
@@ -251,8 +245,6 @@ static long __mlock_vma_pages_range(struct vm_area_struct *vma,
                ret = 0;
        }
 
-       lru_add_drain_all();    /* to update stats */
-
        return ret;     /* count entire vma as locked_vm */
 }
 
@@ -546,6 +538,8 @@ asmlinkage long sys_mlock(unsigned long start, size_t len)
        if (!can_do_mlock())
                return -EPERM;
 
+       lru_add_drain_all();    /* flush pagevec */
+
        down_write(&current->mm->mmap_sem);
        len = PAGE_ALIGN(len + (start & ~PAGE_MASK));
        start &= PAGE_MASK;
@@ -612,6 +606,8 @@ asmlinkage long sys_mlockall(int flags)
        if (!can_do_mlock())
                goto out;
 
+       lru_add_drain_all();    /* flush pagevec */
+
        down_write(&current->mm->mmap_sem);
 
        lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;