36 files changed, 143 insertions, 62 deletions
diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 459f1bc25a7b..c5f22bb0a48e 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -2533,7 +2533,6 @@ static bool DAC960_RegisterBlockDevice(DAC960_Controller_T *Controller)
        Controller->RequestQueue[n] = RequestQueue;
        blk_queue_bounce_limit(RequestQueue, Controller->BounceBufferLimit);
        RequestQueue->queuedata = Controller;
-        blk_queue_max_hw_segments(RequestQueue, Controller->DriverScatterGatherLimit);
        blk_queue_max_segments(RequestQueue, Controller->DriverScatterGatherLimit);
        blk_queue_max_hw_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
        disk->queue = RequestQueue;
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 055225839024..0182a22c423a 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -54,6 +54,7 @@
 */
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/fd.h>
 #include <linux/hdreg.h>
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 3af97d4da2db..035cefe4045a 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -9,6 +9,7 @@
 #include <linux/backing-dev.h>
 #include <linux/fs.h>
 #include <linux/ioctl.h>
+#include <linux/slab.h>
 #include <linux/genhd.h>
 #include <linux/netdevice.h>
 #include "aoe.h"
diff --git a/drivers/block/aoe/aoechr.c b/drivers/block/aoe/aoechr.c
index 62141ec09a22..4a1b9e7464aa 100644
--- a/drivers/block/aoe/aoechr.c
+++ b/drivers/block/aoe/aoechr.c
@@ -8,6 +8,7 @@
 #include <linux/blkdev.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
+#include <linux/slab.h>
 #include <linux/smp_lock.h>
 #include <linux/skbuff.h>
 #include "aoe.h"
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 64a223b0cc22..5674bd01d96d 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -5,6 +5,7 @@
 */
 #include <linux/ata.h>
+#include <linux/slab.h>
 #include <linux/hdreg.h>
 #include <linux/blkdev.h>
 #include <linux/skbuff.h>
diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c
index fa67027789aa..0849280bfc1c 100644
--- a/drivers/block/aoe/aoedev.c
+++ b/drivers/block/aoe/aoedev.c
@@ -8,6 +8,7 @@
 #include <linux/blkdev.h>
 #include <linux/netdevice.h>
 #include <linux/delay.h>
+#include <linux/slab.h>
 #include "aoe.h"
 static void dummy_timer(ulong);
diff --git a/drivers/block/aoe/aoenet.c b/drivers/block/aoe/aoenet.c
index ce0d62cd71b2..4d3bc0d49df5 100644
--- a/drivers/block/aoe/aoenet.c
+++ b/drivers/block/aoe/aoenet.c
@@ -4,6 +4,7 @@
 * Ethernet portion of AoE driver
 */
+#include <linux/gfp.h>
 #include <linux/hdreg.h>
 #include <linux/blkdev.h>
 #include <linux/netdevice.h>
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index c6ddeacb77fd..6081e81d5738 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -15,9 +15,9 @@
 #include <linux/blkdev.h>
 #include <linux/bio.h>
 #include <linux/highmem.h>
-#include <linux/gfp.h>
 #include <linux/radix-tree.h>
 #include <linux/buffer_head.h> /* invalidate_bh_lrus() */
+#include <linux/slab.h>
 #include <asm/uaccess.h>
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 9e3af307aae1..eb5ff0531cfb 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3341,6 +3341,7 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id)
                                        printk(KERN_WARNING
                                               "cciss: controller cciss%d failed, stopping.\n",
                                               h->ctlr);
+                                        spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
                                        fail_all_cmds(h->ctlr);
                                        return IRQ_HANDLED;
                                }
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index 17956ff6a08d..df018990c422 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -536,7 +536,9 @@ static void atodb_endio(struct bio *bio, int error)
        put_ldev(mdev);
 }
+/* sector to word */
 #define S2W(s)  ((s)<<(BM_EXT_SHIFT-BM_BLOCK_SHIFT-LN2_BPL))
 /* activity log to on disk bitmap -- prepare bio unless that sector
 * is already covered by previously prepared bios */
 static int atodb_prepare_unless_covered(struct drbd_conf *mdev,
@@ -546,13 +548,20 @@ static int atodb_prepare_unless_covered(struct drbd_conf *mdev,
 {
        struct bio *bio;
        struct page *page;
-        sector_t on_disk_sector = enr + mdev->ldev->md.md_offset
+        sector_t on_disk_sector;
-                                      + mdev->ldev->md.bm_offset;
        unsigned int page_offset = PAGE_SIZE;
        int offset;
        int i = 0;
        int err = -ENOMEM;
+        /* We always write aligned, full 4k blocks,
+         * so we can ignore the logical_block_size (for now) */
+        enr &= ~7U;
+        on_disk_sector = enr + mdev->ldev->md.md_offset
+                             + mdev->ldev->md.bm_offset;
+        D_ASSERT(!(on_disk_sector & 7U));
        /* Check if that enr is already covered by an already created bio.
         * Caution, bios[] is not NULL terminated,
         * but only initialized to all NULL.
@@ -588,7 +597,7 @@ static int atodb_prepare_unless_covered(struct drbd_conf *mdev,
        offset = S2W(enr);
        drbd_bm_get_lel(mdev, offset,
-                        min_t(size_t, S2W(1), drbd_bm_words(mdev) - offset),
+                        min_t(size_t, S2W(8), drbd_bm_words(mdev) - offset),
                        kmap(page) + page_offset);
        kunmap(page);
@@ -597,7 +606,7 @@ static int atodb_prepare_unless_covered(struct drbd_conf *mdev,
        bio->bi_bdev = mdev->ldev->md_bdev;
        bio->bi_sector = on_disk_sector;
-        if (bio_add_page(bio, page, MD_SECTOR_SIZE, page_offset) != MD_SECTOR_SIZE)
+        if (bio_add_page(bio, page, 4096, page_offset) != 4096)
                goto out_put_page;
        atomic_inc(&wc->count);
@@ -1327,7 +1336,7 @@ int drbd_rs_del_all(struct drbd_conf *mdev)
                /* ok, ->resync is there. */
                for (i = 0; i < mdev->resync->nr_elements; i++) {
                        e = lc_element_by_index(mdev->resync, i);
-                        bm_ext = e ? lc_entry(e, struct bm_extent, lce) : NULL;
+                        bm_ext = lc_entry(e, struct bm_extent, lce);
                        if (bm_ext->lce.lc_number == LC_FREE)
                                continue;
                        if (bm_ext->lce.lc_number == mdev->resync_wenr) {
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index b61057e77882..3390716898d5 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -26,6 +26,7 @@
 #include <linux/vmalloc.h>
 #include <linux/string.h>
 #include <linux/drbd.h>
+#include <linux/slab.h>
 #include <asm/kmap_types.h>
 #include "drbd_int.h"
@@ -66,7 +67,7 @@ struct drbd_bitmap {
        size_t   bm_words;
        size_t   bm_number_of_pages;
        sector_t bm_dev_capacity;
-        struct semaphore bm_change; /* serializes resize operations */
+        struct mutex bm_change; /* serializes resize operations */
        atomic_t bm_async_io;
        wait_queue_head_t bm_io_wait;
@@ -114,7 +115,7 @@ void drbd_bm_lock(struct drbd_conf *mdev, char *why)
                return;
        }
-        trylock_failed = down_trylock(&b->bm_change);
+        trylock_failed = !mutex_trylock(&b->bm_change);
        if (trylock_failed) {
                dev_warn(DEV, "%s going to '%s' but bitmap already locked for '%s' by %s\n",
@@ -125,7 +126,7 @@ void drbd_bm_lock(struct drbd_conf *mdev, char *why)
                    b->bm_task == mdev->receiver.task ? "receiver" :
                    b->bm_task == mdev->asender.task  ? "asender"  :
                    b->bm_task == mdev->worker.task   ? "worker"   : "?");
-                down(&b->bm_change);
+                mutex_lock(&b->bm_change);
        }
        if (__test_and_set_bit(BM_LOCKED, &b->bm_flags))
                dev_err(DEV, "FIXME bitmap already locked in bm_lock\n");
@@ -147,7 +148,7 @@ void drbd_bm_unlock(struct drbd_conf *mdev)
        b->bm_why  = NULL;
        b->bm_task = NULL;
-        up(&b->bm_change);
+        mutex_unlock(&b->bm_change);
 }
 /* word offset to long pointer */
@@ -295,7 +296,7 @@ int drbd_bm_init(struct drbd_conf *mdev)
        if (!b)
                return -ENOMEM;
        spin_lock_init(&b->bm_lock);
-        init_MUTEX(&b->bm_change);
+        mutex_init(&b->bm_change);
        init_waitqueue_head(&b->bm_io_wait);
        mdev->bitmap = b;
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index d9301e861d9f..e5e86a781820 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -261,6 +261,9 @@ static inline const char *cmdname(enum drbd_packets cmd)
                [P_OV_REQUEST]          = "OVRequest",
                [P_OV_REPLY]            = "OVReply",
                [P_OV_RESULT]           = "OVResult",
+                [P_CSUM_RS_REQUEST]     = "CsumRSRequest",
+                [P_RS_IS_IN_SYNC]       = "CsumRSIsInSync",
+                [P_COMPRESSED_BITMAP]   = "CBitmap",
                [P_MAX_CMD]             = NULL,
        };
@@ -443,13 +446,18 @@ struct p_rs_param_89 {
        char csums_alg[SHARED_SECRET_MAX];
 } __packed;
+enum drbd_conn_flags {
+        CF_WANT_LOSE = 1,
+        CF_DRY_RUN = 2,
+};
 struct p_protocol {
        struct p_header head;
        u32 protocol;
        u32 after_sb_0p;
        u32 after_sb_1p;
        u32 after_sb_2p;
-        u32 want_lose;
+        u32 conn_flags;
        u32 two_primaries;
              /* Since protocol version 87 and higher. */
@@ -791,6 +799,8 @@ enum {
                                 * while this is set. */
        RESIZE_PENDING,         /* Size change detected locally, waiting for the response from
                                 * the peer, if it changed there as well. */
+        CONN_DRY_RUN,           /* Expect disconnect after resync handshake. */
+        GOT_PING_ACK,           /* set when we receive a ping_ack packet, misc wait gets woken */
 };
 struct drbd_bitmap; /* opaque for drbd_conf */
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index ab871e00ffc5..67e0fc542249 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1668,7 +1668,7 @@ int drbd_send_sync_param(struct drbd_conf *mdev, struct syncer_conf *sc)
 int drbd_send_protocol(struct drbd_conf *mdev)
 {
        struct p_protocol *p;
-        int size, rv;
+        int size, cf, rv;
        size = sizeof(struct p_protocol);
@@ -1685,9 +1685,21 @@ int drbd_send_protocol(struct drbd_conf *mdev)
        p->after_sb_0p   = cpu_to_be32(mdev->net_conf->after_sb_0p);
        p->after_sb_1p   = cpu_to_be32(mdev->net_conf->after_sb_1p);
        p->after_sb_2p   = cpu_to_be32(mdev->net_conf->after_sb_2p);
-        p->want_lose     = cpu_to_be32(mdev->net_conf->want_lose);
        p->two_primaries = cpu_to_be32(mdev->net_conf->two_primaries);
+        cf = 0;
+        if (mdev->net_conf->want_lose)
+                cf |= CF_WANT_LOSE;
+        if (mdev->net_conf->dry_run) {
+                if (mdev->agreed_pro_version >= 92)
+                        cf |= CF_DRY_RUN;
+                else {
+                        dev_err(DEV, "--dry-run is not supported by peer");
+                        return 0;
+                }
+        }
+        p->conn_flags    = cpu_to_be32(cf);
        if (mdev->agreed_pro_version >= 87)
                strcpy(p->integrity_alg, mdev->net_conf->integrity_alg);
@@ -3161,14 +3173,18 @@ void drbd_free_bc(struct drbd_backing_dev *ldev)
 void drbd_free_sock(struct drbd_conf *mdev)
 {
        if (mdev->data.socket) {
+                mutex_lock(&mdev->data.mutex);
                kernel_sock_shutdown(mdev->data.socket, SHUT_RDWR);
                sock_release(mdev->data.socket);
                mdev->data.socket = NULL;
+                mutex_unlock(&mdev->data.mutex);
        }
        if (mdev->meta.socket) {
+                mutex_lock(&mdev->meta.mutex);
                kernel_sock_shutdown(mdev->meta.socket, SHUT_RDWR);
                sock_release(mdev->meta.socket);
                mdev->meta.socket = NULL;
+                mutex_unlock(&mdev->meta.mutex);
        }
 }
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 4df3b40b1057..6429d2b19e06 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -285,8 +285,8 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
                }
                if (r == SS_NO_UP_TO_DATE_DISK && force &&
-                    (mdev->state.disk == D_INCONSISTENT ||
+                    (mdev->state.disk < D_UP_TO_DATE &&
-                     mdev->state.disk == D_OUTDATED)) {
+                     mdev->state.disk >= D_INCONSISTENT)) {
                        mask.disk = D_MASK;
                        val.disk  = D_UP_TO_DATE;
                        forced = 1;
@@ -407,7 +407,7 @@ static int drbd_nl_primary(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
        }
        reply->ret_code =
-                drbd_set_role(mdev, R_PRIMARY, primary_args.overwrite_peer);
+                drbd_set_role(mdev, R_PRIMARY, primary_args.primary_force);
        return 0;
 }
@@ -941,6 +941,25 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
        drbd_md_set_sector_offsets(mdev, nbc);
+        /* allocate a second IO page if logical_block_size != 512 */
+        logical_block_size = bdev_logical_block_size(nbc->md_bdev);
+        if (logical_block_size == 0)
+                logical_block_size = MD_SECTOR_SIZE;
+        if (logical_block_size != MD_SECTOR_SIZE) {
+                if (!mdev->md_io_tmpp) {
+                        struct page *page = alloc_page(GFP_NOIO);
+                        if (!page)
+                                goto force_diskless_dec;
+                        dev_warn(DEV, "Meta data's bdev logical_block_size = %d != %d\n",
+                             logical_block_size, MD_SECTOR_SIZE);
+                        dev_warn(DEV, "Workaround engaged (has performance impact).\n");
+                        mdev->md_io_tmpp = page;
+                }
+        }
        if (!mdev->bitmap) {
                if (drbd_bm_init(mdev)) {
                        retcode = ERR_NOMEM;
@@ -980,25 +999,6 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
                goto force_diskless_dec;
        }
-        /* allocate a second IO page if logical_block_size != 512 */
-        logical_block_size = bdev_logical_block_size(nbc->md_bdev);
-        if (logical_block_size == 0)
-                logical_block_size = MD_SECTOR_SIZE;
-        if (logical_block_size != MD_SECTOR_SIZE) {
-                if (!mdev->md_io_tmpp) {
-                        struct page *page = alloc_page(GFP_NOIO);
-                        if (!page)
-                                goto force_diskless_dec;
-                        dev_warn(DEV, "Meta data's bdev logical_block_size = %d != %d\n",
-                             logical_block_size, MD_SECTOR_SIZE);
-                        dev_warn(DEV, "Workaround engaged (has performance impact).\n");
-                        mdev->md_io_tmpp = page;
-                }
-        }
        /* Reset the "barriers don't work" bits here, then force meta data to
         * be written, to ensure we determine if barriers are supported. */
        if (nbc->dc.no_md_flush)
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c
index df8ad9660d8f..be3374b68460 100644
--- a/drivers/block/drbd/drbd_proc.c
+++ b/drivers/block/drbd/drbd_proc.c
@@ -28,7 +28,6 @@
 #include <asm/uaccess.h>
 #include <linux/fs.h>
 #include <linux/file.h>
-#include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/drbd.h>
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index d065c646b35a..ed9f1de24a71 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -2513,6 +2513,10 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
        }
        if (hg == -100) {
+                /* FIXME this log message is not correct if we end up here
+                 * after an attempted attach on a diskless node.
+                 * We just refuse to attach -- well, we drop the "connection"
+                 * to that disk, in a way... */
                dev_alert(DEV, "Split-Brain detected, dropping connection!\n");
                drbd_khelper(mdev, "split-brain");
                return C_MASK;
@@ -2538,6 +2542,16 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
                }
        }
+        if (mdev->net_conf->dry_run || test_bit(CONN_DRY_RUN, &mdev->flags)) {
+                if (hg == 0)
+                        dev_info(DEV, "dry-run connect: No resync, would become Connected immediately.\n");
+                else
+                        dev_info(DEV, "dry-run connect: Would become %s, doing a %s resync.",
+                                 drbd_conn_str(hg > 0 ? C_SYNC_SOURCE : C_SYNC_TARGET),
+                                 abs(hg) >= 2 ? "full" : "bit-map based");
+                return C_MASK;
+        }
        if (abs(hg) >= 2) {
                dev_info(DEV, "Writing the whole bitmap, full sync required after drbd_sync_handshake.\n");
                if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, "set_n_write from sync_handshake"))
@@ -2585,7 +2599,7 @@ static int receive_protocol(struct drbd_conf *mdev, struct p_header *h)
        struct p_protocol *p = (struct p_protocol *)h;
        int header_size, data_size;
        int p_proto, p_after_sb_0p, p_after_sb_1p, p_after_sb_2p;
-        int p_want_lose, p_two_primaries;
+        int p_want_lose, p_two_primaries, cf;
        char p_integrity_alg[SHARED_SECRET_MAX] = "";
        header_size = sizeof(*p) - sizeof(*h);
@@ -2598,8 +2612,14 @@ static int receive_protocol(struct drbd_conf *mdev, struct p_header *h)
        p_after_sb_0p   = be32_to_cpu(p->after_sb_0p);
        p_after_sb_1p   = be32_to_cpu(p->after_sb_1p);
        p_after_sb_2p   = be32_to_cpu(p->after_sb_2p);
-        p_want_lose     = be32_to_cpu(p->want_lose);
        p_two_primaries = be32_to_cpu(p->two_primaries);
+        cf              = be32_to_cpu(p->conn_flags);
+        p_want_lose = cf & CF_WANT_LOSE;
+        clear_bit(CONN_DRY_RUN, &mdev->flags);
+        if (cf & CF_DRY_RUN)
+                set_bit(CONN_DRY_RUN, &mdev->flags);
        if (p_proto != mdev->net_conf->wire_protocol) {
                dev_err(DEV, "incompatible communication protocols\n");
@@ -3118,13 +3138,16 @@ static int receive_state(struct drbd_conf *mdev, struct p_header *h)
                put_ldev(mdev);
                if (nconn == C_MASK) {
+                        nconn = C_CONNECTED;
                        if (mdev->state.disk == D_NEGOTIATING) {
                                drbd_force_state(mdev, NS(disk, D_DISKLESS));
-                                nconn = C_CONNECTED;
                        } else if (peer_state.disk == D_NEGOTIATING) {
                                dev_err(DEV, "Disk attach process on the peer node was aborted.\n");
                                peer_state.disk = D_DISKLESS;
+                                real_peer_disk = D_DISKLESS;
                        } else {
+                                if (test_and_clear_bit(CONN_DRY_RUN, &mdev->flags))
+                                        return FALSE;
                                D_ASSERT(oconn == C_WF_REPORT_PARAMS);
                                drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
                                return FALSE;
@@ -3594,10 +3617,7 @@ static void drbd_disconnect(struct drbd_conf *mdev)
        /* asender does not clean up anything. it must not interfere, either */
        drbd_thread_stop(&mdev->asender);
-        mutex_lock(&mdev->data.mutex);
        drbd_free_sock(mdev);
-        mutex_unlock(&mdev->data.mutex);
        spin_lock_irq(&mdev->req_lock);
        _drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
@@ -4054,6 +4074,8 @@ static int got_PingAck(struct drbd_conf *mdev, struct p_header *h)
 {
        /* restore idle timeout */
        mdev->meta.socket->sk->sk_rcvtimeo = mdev->net_conf->ping_int*HZ;
+        if (!test_and_set_bit(GOT_PING_ACK, &mdev->flags))
+                wake_up(&mdev->misc_wait);
        return TRUE;
 }
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index b453c2bca3be..44bf6d11197e 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -938,7 +938,8 @@ int w_e_end_csum_rs_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
                if (eq) {
                        drbd_set_in_sync(mdev, e->sector, e->size);
-                        mdev->rs_same_csum++;
+                        /* rs_same_csums unit is BM_BLOCK_SIZE */
+                        mdev->rs_same_csum += e->size >> BM_BLOCK_SHIFT;
                        ok = drbd_send_ack(mdev, P_RS_IS_IN_SYNC, e);
                } else {
                        inc_rs_pending(mdev);
@@ -1288,6 +1289,14 @@ int drbd_alter_sa(struct drbd_conf *mdev, int na)
        return retcode;
 }
+static void ping_peer(struct drbd_conf *mdev)
+{
+        clear_bit(GOT_PING_ACK, &mdev->flags);
+        request_ping(mdev);
+        wait_event(mdev->misc_wait,
+                   test_bit(GOT_PING_ACK, &mdev->flags) || mdev->state.conn < C_CONNECTED);
+}
 /**
 * drbd_start_resync() - Start the resync process
 * @mdev:       DRBD device.
@@ -1371,7 +1380,6 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
                _drbd_pause_after(mdev);
        }
        write_unlock_irq(&global_state_lock);
-        drbd_state_unlock(mdev);
        put_ldev(mdev);
        if (r == SS_SUCCESS) {
@@ -1382,11 +1390,8 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
                if (mdev->rs_total == 0) {
                        /* Peer still reachable? Beware of failing before-resync-target handlers! */
-                        request_ping(mdev);
+                        ping_peer(mdev);
-                        __set_current_state(TASK_INTERRUPTIBLE);
-                        schedule_timeout(mdev->net_conf->ping_timeo*HZ/9); /* 9 instead 10 */
                        drbd_resync_finished(mdev);
-                        return;
                }
                /* ns.conn may already be != mdev->state.conn,
@@ -1398,6 +1403,7 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
                drbd_md_sync(mdev);
        }
+        drbd_state_unlock(mdev);
 }
 int drbd_worker(struct drbd_thread *thi)
diff --git a/drivers/block/hd.c b/drivers/block/hd.c
index 5116c65c07cb..034e6dfc878c 100644
--- a/drivers/block/hd.c
+++ b/drivers/block/hd.c
@@ -34,7 +34,6 @@
 #include <linux/fs.h>
 #include <linux/kernel.h>
 #include <linux/genhd.h>
-#include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index bd112c8c7bcd..8546d123b9a7 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -71,7 +71,6 @@
 #include <linux/buffer_head.h>          /* for invalidate_bdev() */
 #include <linux/completion.h>
 #include <linux/highmem.h>
-#include <linux/gfp.h>
 #include <linux/kthread.h>
 #include <linux/splice.h>
@@ -238,6 +237,8 @@ static int do_lo_send_aops(struct loop_device *lo, struct bio_vec *bvec,
                if (ret)
                        goto fail;
+                file_update_time(file);
                transfer_result = lo_do_transfer(lo, WRITE, page, offset,
                                bvec->bv_page, bv_offs, size, IV);
                copied = size;
diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
index 5416c9a606e4..28db925dbdad 100644
--- a/drivers/block/mg_disk.c
+++ b/drivers/block/mg_disk.c
@@ -23,6 +23,7 @@
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/mg_disk.h>
+#include <linux/slab.h>
 #define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index cc923a5b430c..218d091f3c52 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -27,6 +27,7 @@
 #include <linux/compiler.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <net/sock.h>
 #include <linux/net.h>
 #include <linux/kthread.h>
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index eb2091aa1c19..6cd8b705b11b 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -63,6 +63,7 @@
 #include <linux/device.h>
 #include <linux/module.h>
 #include <linux/fs.h>
+#include <linux/slab.h>
 #include <scsi/osd_initiator.h>
 #include <scsi/osd_attributes.h>
 #include <scsi/osd_sec.h>
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index 8866ca369d5e..71acf4e53356 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -341,11 +341,11 @@ static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg)
               && (j++ < PCD_SPIN))
                udelay(PCD_DELAY);
-        if ((r & (IDE_ERR & stop)) || (j >= PCD_SPIN)) {
+        if ((r & (IDE_ERR & stop)) || (j > PCD_SPIN)) {
                s = read_reg(cd, 7);
                e = read_reg(cd, 1);
                p = read_reg(cd, 2);
-                if (j >= PCD_SPIN)
+                if (j > PCD_SPIN)
                        e |= 0x100;
                if (fun)
                        printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index e712cd51af15..c1e5cd029b23 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -145,6 +145,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_GEO, D_SBY, D_DLY, D_SLV};
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/gfp.h>
 #include <linux/fs.h>
 #include <linux/delay.h>
 #include <linux/hdreg.h>
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index ddb4f9abd480..c059aab3006b 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -391,11 +391,11 @@ static int pf_wait(struct pf_unit *pf, int go, int stop, char *fun, char *msg)
               && (j++ < PF_SPIN))
                udelay(PF_SPIN_DEL);
-        if ((r & (STAT_ERR & stop)) || (j >= PF_SPIN)) {
+        if ((r & (STAT_ERR & stop)) || (j > PF_SPIN)) {
                s = read_reg(pf, 7);
                e = read_reg(pf, 1);
                p = read_reg(pf, 2);
-                if (j >= PF_SPIN)
+                if (j > PF_SPIN)
                        e |= 0x100;
                if (fun)
                        printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
diff --git a/drivers/block/paride/pt.c b/drivers/block/paride/pt.c
index 1e4006e18f03..bc5825fdeaab 100644
--- a/drivers/block/paride/pt.c
+++ b/drivers/block/paride/pt.c
@@ -274,11 +274,11 @@ static int pt_wait(struct pt_unit *tape, int go, int stop, char *fun, char *msg)
               && (j++ < PT_SPIN))
                udelay(PT_SPIN_DEL);
-        if ((r & (STAT_ERR & stop)) || (j >= PT_SPIN)) {
+        if ((r & (STAT_ERR & stop)) || (j > PT_SPIN)) {
                s = read_reg(pi, 7);
                e = read_reg(pi, 1);
                p = read_reg(pi, 2);
-                if (j >= PT_SPIN)
+                if (j > PT_SPIN)
                        e |= 0x100;
                if (fun)
                        printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 39c8514442eb..ddf19425245d 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -57,6 +57,7 @@
 #include <linux/miscdevice.h>
 #include <linux/freezer.h>
 #include <linux/mutex.h>
+#include <linux/slab.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_ioctl.h>
 #include <scsi/scsi.h>
diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index bc95469d33c1..3b419e3fffa1 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -20,6 +20,7 @@
 #include <linux/ata.h>
 #include <linux/blkdev.h>
+#include <linux/slab.h>
 #include <asm/lv1call.h>
 #include <asm/ps3stor.h>
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index e44608229972..b3bdb8af89cf 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -12,6 +12,7 @@
 #include <linux/delay.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include <asm/cell-regs.h>
 #include <asm/firmware.h>
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 821c2833f9cf..e463657569ff 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -18,6 +18,7 @@
 #include <linux/module.h>
 #include <linux/fd.h>
+#include <linux/slab.h>
 #include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/kernel.h>
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 2e889838e819..0536b5b29adc 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -27,6 +27,7 @@
 #include <linux/blkdev.h>
 #include <linux/timer.h>
 #include <linux/scatterlist.h>
+#include <linux/slab.h>
 #include <scsi/scsi.h>
 #define DRV_NAME "ub"
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
index ad1ba393801a..2f9470ff8f7c 100644
--- a/drivers/block/umem.c
+++ b/drivers/block/umem.c
@@ -40,13 +40,13 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/mman.h>
+#include <linux/gfp.h>
 #include <linux/ioctl.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/timer.h>
 #include <linux/pci.h>
-#include <linux/slab.h>
 #include <linux/dma-mapping.h>
 #include <linux/fcntl.h>        /* O_ACCMODE */
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 3c64af05fa82..2138a7ae050c 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -1,5 +1,6 @@
 //#define DEBUG
 #include <linux/spinlock.h>
+#include <linux/slab.h>
 #include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/virtio.h>
@@ -347,14 +348,13 @@ static int __devinit virtblk_probe(struct virtio_device *vdev)
        set_capacity(vblk->disk, cap);
        /* We can handle whatever the host told us to handle. */
-        blk_queue_max_phys_segments(q, vblk->sg_elems-2);
+        blk_queue_max_segments(q, vblk->sg_elems-2);
-        blk_queue_max_hw_segments(q, vblk->sg_elems-2);
        /* No need to bounce any requests */
        blk_queue_bounce_limit(q, BLK_BOUNCE_ANY);
        /* No real sector limit. */
-        blk_queue_max_sectors(q, -1U);
+        blk_queue_max_hw_sectors(q, -1U);
        /* Host can optionally specify maximum segment size and number of
         * segments. */
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index 1a325fb05c92..18a80ff57ce8 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -49,6 +49,7 @@
 #include <linux/blkpg.h>
 #include <linux/delay.h>
 #include <linux/io.h>
+#include <linux/gfp.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9c09694b2520..82ed403147c0 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -40,6 +40,7 @@
 #include <linux/hdreg.h>
 #include <linux/cdrom.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/scatterlist.h>
 #include <xen/xen.h>
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index 64f941e0f14b..9114654b54d9 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -33,6 +33,7 @@
 #include <linux/module.h>
 #include <linux/blkdev.h>
 #include <linux/bitops.h>
+#include <linux/slab.h>
 #include <asm/setup.h>
 #include <asm/amigahw.h>