1 files changed, 12 insertions, 29 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index 6fa530256bfd..e8aa7081d25c 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -275,6 +275,7 @@ void invalidate_bdev(struct block_device *bdev)
                 return;
 
         invalidate_bh_lrus();
+        lru_add_drain_all();    /* make sure all lru add caches are flushed */
         invalidate_mapping_pages(mapping, 0, -1);
 }
 EXPORT_SYMBOL(invalidate_bdev);
@@ -560,26 +561,17 @@ repeat:
         return err;
 }
 
-static void do_thaw_all(struct work_struct *work)
+static void do_thaw_one(struct super_block *sb, void *unused)
 {
-        struct super_block *sb;
         char b[BDEVNAME_SIZE];
+        while (sb->s_bdev && !thaw_bdev(sb->s_bdev, sb))
+                printk(KERN_WARNING "Emergency Thaw on %s\n",
+                       bdevname(sb->s_bdev, b));
+}
 
-        spin_lock(&sb_lock);
-restart:
-        list_for_each_entry(sb, &super_blocks, s_list) {
-                sb->s_count++;
-                spin_unlock(&sb_lock);
-                down_read(&sb->s_umount);
-                while (sb->s_bdev && !thaw_bdev(sb->s_bdev, sb))
-                        printk(KERN_WARNING "Emergency Thaw on %s\n",
-                               bdevname(sb->s_bdev, b));
-                up_read(&sb->s_umount);
-                spin_lock(&sb_lock);
-                if (__put_super_and_need_restart(sb))
-                        goto restart;
-        }
-        spin_unlock(&sb_lock);
+static void do_thaw_all(struct work_struct *work)
+{
+        iterate_supers(do_thaw_one, NULL);
         kfree(work);
         printk(KERN_WARNING "Emergency Thaw complete\n");
 }
@@ -2893,7 +2885,7 @@ int block_write_full_page_endio(struct page *page, get_block_t *get_block,
 
         /*
          * The page straddles i_size.  It must be zeroed out on each and every
-         * writepage invokation because it may be mmapped.  "A file is mapped
+         * writepage invocation because it may be mmapped.  "A file is mapped
          * in multiples of the page size.  For a file that is not a multiple of
          * the  page size, the remaining memory is zeroed when mapped, and
          * writes to that region are not written out to the file."
@@ -3265,7 +3257,7 @@ static void recalc_bh_state(void)
         
 struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
 {
-        struct buffer_head *ret = kmem_cache_alloc(bh_cachep, gfp_flags);
+        struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags);
         if (ret) {
                 INIT_LIST_HEAD(&ret->b_assoc_buffers);
                 get_cpu_var(bh_accounting).nr++;
@@ -3352,15 +3344,6 @@ int bh_submit_read(struct buffer_head *bh)
 }
 EXPORT_SYMBOL(bh_submit_read);
 
-static void
-init_buffer_head(void *data)
-{
-        struct buffer_head *bh = data;
-
-        memset(bh, 0, sizeof(*bh));
-        INIT_LIST_HEAD(&bh->b_assoc_buffers);
-}
-
 void __init buffer_init(void)
 {
         int nrpages;
@@ -3369,7 +3352,7 @@ void __init buffer_init(void)
                         sizeof(struct buffer_head), 0,
                                 (SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|
                                 SLAB_MEM_SPREAD),
-                                init_buffer_head);
+                                NULL);
 
         /*
          * Limit the bh occupancy to 10% of ZONE_NORMAL