raid5: use flex_array for scribble data
Use flex_array for scribble data. Next patch will batch several stripes
together, so scribble data should be able to cover several stripes, so this
patch also allocates scribble data for stripes across a chunk.
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index 983e18a..1d0f241 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -458,15 +458,11 @@
/* per cpu variables */
struct raid5_percpu {
struct page *spare_page; /* Used when checking P/Q in raid6 */
- void *scribble; /* space for constructing buffer
+ struct flex_array *scribble; /* space for constructing buffer
* lists and performing address
* conversions
*/
} __percpu *percpu;
- size_t scribble_len; /* size of scribble region must be
- * associated with conf to handle
- * cpu hotplug while reshaping
- */
#ifdef CONFIG_HOTPLUG_CPU
struct notifier_block cpu_notify;
#endif