dm crypt: add plain64 iv

[safe/jmp/linux-2.6] / drivers / md / bitmap.c

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 06b0ded..60e2b32 100644 (file)
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -108,6 +108,8 @@ static void bitmap_free_page(struct bitmap *bitmap, unsigned char *page)
  * allocated while we're using it
  */
 static int bitmap_checkpage(struct bitmap *bitmap, unsigned long page, int create)
+__releases(bitmap->lock)
+__acquires(bitmap->lock)
 {
        unsigned char *mappage;
 
@@ -325,7 +327,6 @@ static int write_sb_page(struct bitmap *bitmap, struct page *page, int wait)
        return 0;
 
  bad_alignment:
-       rcu_read_unlock();
        return -EINVAL;
 }
 
@@ -1097,14 +1098,12 @@ void bitmap_daemon_work(struct bitmap *bitmap)
        }
        bitmap->allclean = 1;
 
+       spin_lock_irqsave(&bitmap->lock, flags);
        for (j = 0; j < bitmap->chunks; j++) {
                bitmap_counter_t *bmc;
-               spin_lock_irqsave(&bitmap->lock, flags);
-               if (!bitmap->filemap) {
+               if (!bitmap->filemap)
                        /* error or shutdown */
-                       spin_unlock_irqrestore(&bitmap->lock, flags);
                        break;
-               }
 
                page = filemap_get_page(bitmap, j);
 
@@ -1121,6 +1120,8 @@ void bitmap_daemon_work(struct bitmap *bitmap)
                                        write_page(bitmap, page, 0);
                                        bitmap->allclean = 0;
                                }
+                               spin_lock_irqsave(&bitmap->lock, flags);
+                               j |= (PAGE_BITS - 1);
                                continue;
                        }
 
@@ -1181,9 +1182,10 @@ void bitmap_daemon_work(struct bitmap *bitmap)
                                        ext2_clear_bit(file_page_offset(j), paddr);
                                kunmap_atomic(paddr, KM_USER0);
                        }
-               }
-               spin_unlock_irqrestore(&bitmap->lock, flags);
+               } else
+                       j |= PAGE_COUNTER_MASK;
        }
+       spin_unlock_irqrestore(&bitmap->lock, flags);
 
        /* now sync the final page */
        if (lastpage != NULL) {
@@ -1206,6 +1208,8 @@ void bitmap_daemon_work(struct bitmap *bitmap)
 static bitmap_counter_t *bitmap_get_counter(struct bitmap *bitmap,
                                            sector_t offset, int *blocks,
                                            int create)
+__releases(bitmap->lock)
+__acquires(bitmap->lock)
 {
        /* If 'create', we might release the lock and reclaim it.
         * The lock must have been taken with interrupts enabled.
@@ -1620,10 +1624,11 @@ int bitmap_create(mddev_t *mddev)
        bitmap->offset = mddev->bitmap_offset;
        if (file) {
                get_file(file);
-               do_sync_mapping_range(file->f_mapping, 0, LLONG_MAX,
-                                     SYNC_FILE_RANGE_WAIT_BEFORE |
-                                     SYNC_FILE_RANGE_WRITE |
-                                     SYNC_FILE_RANGE_WAIT_AFTER);
+               /* As future accesses to this file will use bmap,
+                * and bypass the page cache, we must sync the file
+                * first.
+                */
+               vfs_fsync(file, file->f_dentry, 1);
        }
        /* read superblock from bitmap file (this sets bitmap->chunksize) */
        err = bitmap_read_sb(bitmap);