X-Git-Url: http://git.agner.ch/gitweb/?a=blobdiff_plain;f=drivers%2Fmd%2Fbitmap.c;h=5554adaa58f9be01d37bc5623f63384c084e69de;hb=d68798374bcf5cd4a19105b86d96121651b3c8cb;hp=11108165e26420a6f8a3eabb8794e1e0ad833754;hpb=bcd8b54f7d9c980b945d3f1cc48f76f2fa6e2e1b;p=linux-drm-fsl-dcu.git

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 11108165e264..5554adaa58f9 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -666,7 +666,7 @@ static void bitmap_file_put(struct bitmap *bitmap)
 
 	if (file) {
 		struct inode *inode = file->f_path.dentry->d_inode;
-		invalidate_inode_pages(inode->i_mapping);
+		invalidate_mapping_pages(inode->i_mapping, 0, -1);
 		fput(file);
 	}
 }
@@ -1160,6 +1160,22 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 			return 0;
 		}
 
+		if (unlikely((*bmc & COUNTER_MAX) == COUNTER_MAX)) {
+			DEFINE_WAIT(__wait);
+			/* note that it is safe to do the prepare_to_wait
+			 * after the test as long as we do it before dropping
+			 * the spinlock.
+			 */
+			prepare_to_wait(&bitmap->overflow_wait, &__wait,
+					TASK_UNINTERRUPTIBLE);
+			spin_unlock_irq(&bitmap->lock);
+			bitmap->mddev->queue
+				->unplug_fn(bitmap->mddev->queue);
+			schedule();
+			finish_wait(&bitmap->overflow_wait, &__wait);
+			continue;
+		}
+
 		switch(*bmc) {
 		case 0:
 			bitmap_file_set_bit(bitmap, offset);
@@ -1169,7 +1185,7 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 		case 1:
 			*bmc = 2;
 		}
-		BUG_ON((*bmc & COUNTER_MAX) == COUNTER_MAX);
+
 		(*bmc)++;
 
 		spin_unlock_irq(&bitmap->lock);
@@ -1207,6 +1223,9 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long secto
 		if (!success && ! (*bmc & NEEDED_MASK))
 			*bmc |= NEEDED_MASK;
 
+		if ((*bmc & COUNTER_MAX) == COUNTER_MAX)
+			wake_up(&bitmap->overflow_wait);
+
 		(*bmc)--;
 		if (*bmc <= 2) {
 			set_page_attr(bitmap,
@@ -1431,6 +1450,7 @@ int bitmap_create(mddev_t *mddev)
 	spin_lock_init(&bitmap->lock);
 	atomic_set(&bitmap->pending_writes, 0);
 	init_waitqueue_head(&bitmap->write_wait);
+	init_waitqueue_head(&bitmap->overflow_wait);
 
 	bitmap->mddev = mddev;