Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  fs/bio.c: fix shadows sparse warning
  drbd: The kernel code is now equivalent to out of tree release 8.3.7
  drbd: Allow online resizing of DRBD devices while peer not reachable (needs to be explicitly forced)
  drbd: Don't go into StandAlone mode when authentification failes because of network error
  drivers/block/drbd/drbd_receiver.c: correct NULL test
  cfq-iosched: Respect ioprio_class when preempting
  genhd: overlapping variable definition
  block: removed unused as_io_context
  DM: Fix device mapper topology stacking
  block: bdev_stack_limits wrapper
  block: Fix discard alignment calculation and printing
  block: Correct handling of bottom device misaligment
  drbd: check on CONFIG_LBDAF, not LBD
  drivers/block/drbd: Correct NULL test
  drbd: Silenced an assert that could triggered after changing write ordering method
  drbd: Kconfig fix
  drbd: Fix for a race between IO and a detach operation [Bugz 262]
  drbd: Use drbd_crypto_is_hash() instead of an open coded check

include/linux/blkdev.h

@@ -938,6 +938,8 @@ extern void blk_queue_io_opt(struct request_queue *q, unsigned int opt);
 extern void blk_set_default_limits(struct queue_limits *lim);
 extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
 			    sector_t offset);
+extern int bdev_stack_limits(struct queue_limits *t, struct block_device *bdev,
+			    sector_t offset);
 extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev,
 			      sector_t offset);
 extern void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b);
@@ -1148,8 +1150,11 @@ static inline int queue_discard_alignment(struct request_queue *q)
 static inline int queue_sector_discard_alignment(struct request_queue *q,
 						 sector_t sector)
 {
-	return ((sector << 9) - q->limits.discard_alignment)
-		& (q->limits.discard_granularity - 1);
+	struct queue_limits *lim = &q->limits;
+	unsigned int alignment = (sector << 9) & (lim->discard_granularity - 1);
+
+	return (lim->discard_granularity + lim->discard_alignment - alignment)
+		& (lim->discard_granularity - 1);
 }
 
 static inline unsigned int queue_discard_zeroes_data(struct request_queue *q)

include/linux/drbd.h

@@ -53,7 +53,7 @@
 
 
 extern const char *drbd_buildtag(void);
-#define REL_VERSION "8.3.6"
+#define REL_VERSION "8.3.7"
 #define API_VERSION 88
 #define PRO_VERSION_MIN 86
 #define PRO_VERSION_MAX 91

include/linux/drbd_nl.h

@@ -69,6 +69,7 @@ NL_PACKET(disconnect, 6, )
 
 NL_PACKET(resize, 7,
 	NL_INT64(		29,	T_MAY_IGNORE,	resize_size)
+	NL_BIT(			68,	T_MAY_IGNORE,	resize_force)
 )
 
 NL_PACKET(syncer_conf, 8,

include/linux/genhd.h

@@ -256,9 +256,9 @@ extern struct hd_struct *disk_map_sector_rcu(struct gendisk *disk,
 #define part_stat_read(part, field)					\
 ({									\
 	typeof((part)->dkstats->field) res = 0;				\
-	int i;								\
-	for_each_possible_cpu(i)					\
-		res += per_cpu_ptr((part)->dkstats, i)->field;		\
+	unsigned int _cpu;						\
+	for_each_possible_cpu(_cpu)					\
+		res += per_cpu_ptr((part)->dkstats, _cpu)->field;	\
 	res;								\
 })
 

include/linux/iocontext.h

@@ -4,32 +4,6 @@
 #include <linux/radix-tree.h>
 #include <linux/rcupdate.h>
 
-/*
- * This is the per-process anticipatory I/O scheduler state.
- */
-struct as_io_context {
-	spinlock_t lock;
-
-	void (*dtor)(struct as_io_context *aic); /* destructor */
-	void (*exit)(struct as_io_context *aic); /* called on task exit */
-
-	unsigned long state;
-	atomic_t nr_queued; /* queued reads & sync writes */
-	atomic_t nr_dispatched; /* number of requests gone to the drivers */
-
-	/* IO History tracking */
-	/* Thinktime */
-	unsigned long last_end_request;
-	unsigned long ttime_total;
-	unsigned long ttime_samples;
-	unsigned long ttime_mean;
-	/* Layout pattern */
-	unsigned int seek_samples;
-	sector_t last_request_pos;
-	u64 seek_total;
-	sector_t seek_mean;
-};
-
 struct cfq_queue;
 struct cfq_io_context {
 	void *key;
@@ -78,7 +52,6 @@ struct io_context {
 	unsigned long last_waited; /* Time last woken after wait for request */
 	int nr_batch_requests;     /* Number of requests left in the batch */
 
-	struct as_io_context *aic;
 	struct radix_tree_root radix_root;
 	struct hlist_head cic_list;
 	void *ioc_data;