1 files changed, 13 insertions, 2 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2ad95fa1d130..ae9091a68480 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -257,7 +257,7 @@ struct queue_limits {
         unsigned char           misaligned;
         unsigned char           discard_misaligned;
         unsigned char           cluster;
-        signed char             discard_zeroes_data;
+        unsigned char           discard_zeroes_data;
 };
 
 struct request_queue
@@ -364,6 +364,8 @@ struct request_queue
          * for flush operations
          */
         unsigned int            flush_flags;
+        unsigned int            flush_not_queueable:1;
+        unsigned int            flush_queue_delayed:1;
         unsigned int            flush_pending_idx:1;
         unsigned int            flush_running_idx:1;
         unsigned long           flush_pending_since;
@@ -843,6 +845,7 @@ extern void blk_queue_softirq_done(struct request_queue *, softirq_done_fn *);
 extern void blk_queue_rq_timed_out(struct request_queue *, rq_timed_out_fn *);
 extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
 extern void blk_queue_flush(struct request_queue *q, unsigned int flush);
+extern void blk_queue_flush_queueable(struct request_queue *q, bool queueable);
 extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
 
 extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *);
@@ -1066,13 +1069,16 @@ static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector
 {
         unsigned int alignment = (sector << 9) & (lim->discard_granularity - 1);
 
+        if (!lim->max_discard_sectors)
+                return 0;
+
         return (lim->discard_granularity + lim->discard_alignment - alignment)
                 & (lim->discard_granularity - 1);
 }
 
 static inline unsigned int queue_discard_zeroes_data(struct request_queue *q)
 {
-        if (q->limits.discard_zeroes_data == 1)
+        if (q->limits.max_discard_sectors && q->limits.discard_zeroes_data == 1)
                 return 1;
 
         return 0;
@@ -1111,6 +1117,11 @@ static inline unsigned int block_size(struct block_device *bdev)
         return bdev->bd_block_size;
 }
 
+static inline bool queue_flush_queueable(struct request_queue *q)
+{
+        return !q->flush_not_queueable;
+}
+
 typedef struct {struct page *v;} Sector;
 
 unsigned char *read_dev_sector(struct block_device *, sector_t, Sector *);