Merge branch 'for-2.6.40/drivers' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.40/drivers' of git://git.kernel.dk/linux-2.6-block: (110 commits)
  loop: handle on-demand devices correctly
  loop: limit 'max_part' module param to DISK_MAX_PARTS
  drbd: fix warning
  drbd: fix warning
  drbd: Fix spelling
  drbd: fix schedule in atomic
  drbd: Take a more conservative approach when deciding max_bio_size
  drbd: Fixed state transitions after async outdate-peer-handler returned
  drbd: Disallow the peer_disk_state to be D_OUTDATED while connected
  drbd: Fix for the connection problems on high latency links
  drbd: fix potential activity log refcount imbalance in error path
  drbd: Only downgrade the disk state in case of disk failures
  drbd: fix disconnect/reconnect loop, if ping-timeout == ping-int
  drbd: fix potential distributed deadlock
  lru_cache.h: fix comments referring to ts_ instead of lc_
  drbd: Fix for application IO with the on-io-error=pass-on policy
  xen/p2m: Add EXPORT_SYMBOL_GPL to the M2P override functions.
  xen/p2m/m2p/gnttab: Support GNTMAP_host_map in the M2P override.
  xen/blkback: don't fail empty barrier requests
  xen/blkback: fix xenbus_transaction_start() hang caused by double xenbus_transaction_end()
  ...

4 files changed, 25 insertions, 12 deletions

diff --git a/include/linux/drbd.h b/include/linux/drbd.h
index cec467f5d676..9e5f5607eba3 100644
--- a/include/linux/drbd.h
+++ b/include/linux/drbd.h
@@ -38,7 +38,7 @@
 
 /* Although the Linux source code makes a difference between
    generic endianness and the bitfields' endianness, there is no
-   architecture as of Linux-2.6.24-rc4 where the bitfileds' endianness
+   architecture as of Linux-2.6.24-rc4 where the bitfields' endianness
    does not match the generic endianness. */
 
 #if __BYTE_ORDER == __LITTLE_ENDIAN
@@ -53,7 +53,7 @@
 
 
 extern const char *drbd_buildtag(void);
-#define REL_VERSION "8.3.10"
+#define REL_VERSION "8.3.11"
 #define API_VERSION 88
 #define PRO_VERSION_MIN 86
 #define PRO_VERSION_MAX 96
@@ -195,7 +195,7 @@ enum drbd_conns {
         C_WF_REPORT_PARAMS, /* we have a socket */
         C_CONNECTED,      /* we have introduced each other */
         C_STARTING_SYNC_S,  /* starting full sync by admin request. */
-        C_STARTING_SYNC_T,  /* stariing full sync by admin request. */
+        C_STARTING_SYNC_T,  /* starting full sync by admin request. */
         C_WF_BITMAP_S,
         C_WF_BITMAP_T,
         C_WF_SYNC_UUID,
@@ -236,7 +236,7 @@ union drbd_state {
  * pointed out by Maxim Uvarov q<muvarov@ru.mvista.com>
  * even though we transmit as "cpu_to_be32(state)",
  * the offsets of the bitfields still need to be swapped
- * on different endianess.
+ * on different endianness.
  */
         struct {
 #if defined(__LITTLE_ENDIAN_BITFIELD)
@@ -266,7 +266,7 @@ union drbd_state {
                 unsigned peer:2 ;   /* 3/4       primary/secondary/unknown */
                 unsigned role:2 ;   /* 3/4       primary/secondary/unknown */
 #else
-# error "this endianess is not supported"
+# error "this endianness is not supported"
 #endif
         };
         unsigned int i;
diff --git a/include/linux/drbd_tag_magic.h b/include/linux/drbd_tag_magic.h
index f14a165e82dc..069543190516 100644
--- a/include/linux/drbd_tag_magic.h
+++ b/include/linux/drbd_tag_magic.h
@@ -30,7 +30,7 @@ enum packet_types {
         int tag_and_len ## member;
 #include "linux/drbd_nl.h"
 
-/* declate tag-list-sizes */
+/* declare tag-list-sizes */
 static const int tag_list_sizes[] = {
 #define NL_PACKET(name, number, fields) 2 fields ,
 #define NL_INTEGER(pn, pr, member)      + 4 + 4
diff --git a/include/linux/lru_cache.h b/include/linux/lru_cache.h
index 6a4fab7c6e09..7a71ffad037c 100644
--- a/include/linux/lru_cache.h
+++ b/include/linux/lru_cache.h
@@ -139,9 +139,9 @@ write intent log information, three of which are mentioned here.
  * .list is on one of three lists:
  *  in_use: currently in use (refcnt > 0, lc_number != LC_FREE)
  *     lru: unused but ready to be reused or recycled
- *          (ts_refcnt == 0, lc_number != LC_FREE),
+ *          (lc_refcnt == 0, lc_number != LC_FREE),
  *    free: unused but ready to be recycled
- *          (ts_refcnt == 0, lc_number == LC_FREE),
+ *          (lc_refcnt == 0, lc_number == LC_FREE),
  *
  * an element is said to be "in the active set",
  * if either on "in_use" or "lru", i.e. lc_number != LC_FREE.
@@ -160,8 +160,8 @@ struct lc_element {
         struct hlist_node colision;
         struct list_head list;           /* LRU list or free list */
         unsigned refcnt;
-        /* back "pointer" into ts_cache->element[index],
-         * for paranoia, and for "ts_element_to_index" */
+        /* back "pointer" into lc_cache->element[index],
+         * for paranoia, and for "lc_element_to_index" */
         unsigned lc_index;
         /* if we want to track a larger set of objects,
          * it needs to become arch independend u64 */
@@ -190,8 +190,8 @@ struct lru_cache {
         /* Arbitrary limit on maximum tracked objects. Practical limit is much
          * lower due to allocation failures, probably. For typical use cases,
          * nr_elements should be a few thousand at most.
-         * This also limits the maximum value of ts_element.ts_index, allowing the
-         * 8 high bits of .ts_index to be overloaded with flags in the future. */
+         * This also limits the maximum value of lc_element.lc_index, allowing the
+         * 8 high bits of .lc_index to be overloaded with flags in the future. */
 #define LC_MAX_ACTIVE   (1<<24)
 
         /* statistics */
diff --git a/include/xen/interface/io/blkif.h b/include/xen/interface/io/blkif.h
index 61e523af3c46..3d5d6db864fe 100644
--- a/include/xen/interface/io/blkif.h
+++ b/include/xen/interface/io/blkif.h
@@ -45,6 +45,19 @@ typedef uint64_t blkif_sector_t;
 #define BLKIF_OP_WRITE_BARRIER     2
 
 /*
+ * Recognised if "feature-flush-cache" is present in backend xenbus
+ * info.  A flush will ask the underlying storage hardware to flush its
+ * non-volatile caches as appropriate.  The "feature-flush-cache" node
+ * contains a boolean indicating whether flush requests are likely to
+ * succeed or fail. Either way, a flush request may fail at any time
+ * with BLKIF_RSP_EOPNOTSUPP if it is unsupported by the underlying
+ * block-device hardware. The boolean simply indicates whether or not it
+ * is worthwhile for the frontend to attempt flushes.  If a backend does
+ * not recognise BLKIF_OP_WRITE_FLUSH_CACHE, it should *not* create the
+ * "feature-flush-cache" node!
+ */
+#define BLKIF_OP_FLUSH_DISKCACHE   3
+/*
  * Maximum scatter/gather segments per request.
  * This is carefully chosen so that sizeof(struct blkif_ring) <= PAGE_SIZE.
  * NB. This could be 12 if the ring indexes weren't stored in the same page.