Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:
 "Bite-sized chunks this time, to avoid the MTA ratelimiting woes.

   - fs/notify updates

   - ocfs2

   - some of MM"

That laconic "some MM" is mainly the removal of remap_file_pages(),
which is a big simplification of the VM, and which gets rid of a *lot*
of random cruft and special cases because we no longer support the
non-linear mappings that it used.

From a user interface perspective, nothing has changed, because the
remap_file_pages() syscall still exists, it's just done by emulating the
old behavior by creating a lot of individual small mappings instead of
one non-linear one.

The emulation is slower than the old "native" non-linear mappings, but
nobody really uses or cares about remap_file_pages(), and simplifying
the VM is a big advantage.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (78 commits)
  memcg: zap memcg_slab_caches and memcg_slab_mutex
  memcg: zap memcg_name argument of memcg_create_kmem_cache
  memcg: zap __memcg_{charge,uncharge}_slab
  mm/page_alloc.c: place zone_id check before VM_BUG_ON_PAGE check
  mm: hugetlb: fix type of hugetlb_treat_as_movable variable
  mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?
  mm: memory: merge shared-writable dirtying branches in do_wp_page()
  mm: memory: remove ->vm_file check on shared writable vmas
  xtensa: drop _PAGE_FILE and pte_file()-related helpers
  x86: drop _PAGE_FILE and pte_file()-related helpers
  unicore32: drop pte_file()-related helpers
  um: drop _PAGE_FILE and pte_file()-related helpers
  tile: drop pte_file()-related helpers
  sparc: drop pte_file()-related helpers
  sh: drop _PAGE_FILE and pte_file()-related helpers
  score: drop _PAGE_FILE and pte_file()-related helpers
  s390: drop pte_file()-related helpers
  parisc: drop _PAGE_FILE and pte_file()-related helpers
  openrisc: drop _PAGE_FILE and pte_file()-related helpers
  nios2: drop _PAGE_FILE and pte_file()-related helpers
  ...

20 files changed, 64 insertions, 71 deletions

diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index 7e8282dcea2a..c58a1bcfda0f 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -245,16 +245,14 @@ int ocfs2_set_acl(handle_t *handle,
                         ret = posix_acl_equiv_mode(acl, &mode);
                         if (ret < 0)
                                 return ret;
-                        else {
-                                if (ret == 0)
-                                        acl = NULL;
 
-                                ret = ocfs2_acl_set_mode(inode, di_bh,
-                                                         handle, mode);
-                                if (ret)
-                                        return ret;
+                        if (ret == 0)
+                                acl = NULL;
 
-                        }
+                        ret = ocfs2_acl_set_mode(inode, di_bh,
+                                                 handle, mode);
+                        if (ret)
+                                return ret;
                 }
                 break;
         case ACL_TYPE_DEFAULT:
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index fcae9ef1a328..044158bd22be 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -6873,7 +6873,7 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
         if (IS_ERR(handle)) {
                 ret = PTR_ERR(handle);
                 mlog_errno(ret);
-                goto out_unlock;
+                goto out;
         }
 
         ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
@@ -6931,7 +6931,7 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
                 if (ret) {
                         mlog_errno(ret);
                         need_free = 1;
-                        goto out_commit;
+                        goto out_unlock;
                 }
 
                 page_end = PAGE_CACHE_SIZE;
@@ -6964,12 +6964,16 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
                 if (ret) {
                         mlog_errno(ret);
                         need_free = 1;
-                        goto out_commit;
+                        goto out_unlock;
                 }
 
                 inode->i_blocks = ocfs2_inode_sector_count(inode);
         }
 
+out_unlock:
+        if (pages)
+                ocfs2_unlock_and_free_pages(pages, num_pages);
+
 out_commit:
         if (ret < 0 && did_quota)
                 dquot_free_space_nodirty(inode,
@@ -6989,15 +6993,11 @@ out_commit:
 
         ocfs2_commit_trans(osb, handle);
 
-out_unlock:
+out:
         if (data_ac)
                 ocfs2_free_alloc_context(data_ac);
-
-out:
-        if (pages) {
-                ocfs2_unlock_and_free_pages(pages, num_pages);
+        if (pages)
                 kfree(pages);
-        }
 
         return ret;
 }
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index 2e355e0f8335..56c403a563bc 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -1016,7 +1016,8 @@ void o2net_fill_node_map(unsigned long *map, unsigned bytes)
 
         memset(map, 0, bytes);
         for (node = 0; node < O2NM_MAX_NODES; ++node) {
-                o2net_tx_can_proceed(o2net_nn_from_num(node), &sc, &ret);
+                if (!o2net_tx_can_proceed(o2net_nn_from_num(node), &sc, &ret))
+                        continue;
                 if (!ret) {
                         set_bit(node, map);
                         sc_put(sc);
diff --git a/fs/ocfs2/cluster/tcp_internal.h b/fs/ocfs2/cluster/tcp_internal.h
index dc024367110a..b95e7df5b76a 100644
--- a/fs/ocfs2/cluster/tcp_internal.h
+++ b/fs/ocfs2/cluster/tcp_internal.h
@@ -107,12 +107,12 @@ struct o2net_node {
         struct list_head                nn_status_list;
 
         /* connects are attempted from when heartbeat comes up until either hb
-         * goes down, the node is unconfigured, no connect attempts succeed
-         * before O2NET_CONN_IDLE_DELAY, or a connect succeeds.  connect_work
-         * is queued from set_nn_state both from hb up and from itself if a
-         * connect attempt fails and so can be self-arming.  shutdown is
-         * careful to first mark the nn such that no connects will be attempted
-         * before canceling delayed connect work and flushing the queue. */
+         * goes down, the node is unconfigured, or a connect succeeds.
+         * connect_work is queued from set_nn_state both from hb up and from
+         * itself if a connect attempt fails and so can be self-arming.
+         * shutdown is careful to first mark the nn such that no connects will
+         * be attempted before canceling delayed connect work and flushing the
+         * queue. */
         struct delayed_work             nn_connect_work;
         unsigned long                   nn_last_connect_attempt;
 
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 319e786175af..b08050bd3f2e 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -3456,10 +3456,8 @@ static int ocfs2_find_dir_space_el(struct inode *dir, const char *name,
         int blocksize = dir->i_sb->s_blocksize;
 
         status = ocfs2_read_dir_block(dir, 0, &bh, 0);
-        if (status) {
-                mlog_errno(status);
+        if (status)
                 goto bail;
-        }
 
         rec_len = OCFS2_DIR_REC_LEN(namelen);
         offset = 0;
@@ -3480,10 +3478,9 @@ static int ocfs2_find_dir_space_el(struct inode *dir, const char *name,
                         status = ocfs2_read_dir_block(dir,
                                              offset >> sb->s_blocksize_bits,
                                              &bh, 0);
-                        if (status) {
-                                mlog_errno(status);
+                        if (status)
                                 goto bail;
-                        }
+
                         /* move to next block */
                         de = (struct ocfs2_dir_entry *) bh->b_data;
                 }
@@ -3513,7 +3510,6 @@ next:
                 de = (struct ocfs2_dir_entry *)((char *) de + le16_to_cpu(de->rec_len));
         }
 
-        status = 0;
 bail:
         brelse(bh);
         if (status)
diff --git a/fs/ocfs2/dlm/dlmast.c b/fs/ocfs2/dlm/dlmast.c
index b46278f9ae44..fd6bbbbd7d78 100644
--- a/fs/ocfs2/dlm/dlmast.c
+++ b/fs/ocfs2/dlm/dlmast.c
@@ -385,8 +385,12 @@ int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data,
                 head = &res->granted;
 
         list_for_each_entry(lock, head, list) {
-                if (lock->ml.cookie == cookie)
+                /* if lock is found but unlock is pending ignore the bast */
+                if (lock->ml.cookie == cookie) {
+                        if (lock->unlock_pending)
+                                break;
                         goto do_ast;
+                }
         }
 
         mlog(0, "Got %sast for unknown lock! cookie=%u:%llu, name=%.*s, "
diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c
index 149eb556b8c6..825136070d2c 100644
--- a/fs/ocfs2/dlm/dlmdebug.c
+++ b/fs/ocfs2/dlm/dlmdebug.c
@@ -406,7 +406,7 @@ static int debug_purgelist_print(struct dlm_ctxt *dlm, char *buf, int len)
         }
         spin_unlock(&dlm->spinlock);
 
-        out += snprintf(buf + out, len - out, "Total on list: %ld\n", total);
+        out += snprintf(buf + out, len - out, "Total on list: %lu\n", total);
 
         return out;
 }
@@ -464,7 +464,7 @@ static int debug_mle_print(struct dlm_ctxt *dlm, char *buf, int len)
         spin_unlock(&dlm->master_lock);
 
         out += snprintf(buf + out, len - out,
-                        "Total: %ld, Longest: %ld\n", total, longest);
+                        "Total: %lu, Longest: %lu\n", total, longest);
         return out;
 }
 
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 50a59d2337b2..7df88a6dd626 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -674,20 +674,6 @@ static void dlm_leave_domain(struct dlm_ctxt *dlm)
         spin_unlock(&dlm->spinlock);
 }
 
-int dlm_joined(struct dlm_ctxt *dlm)
-{
-        int ret = 0;
-
-        spin_lock(&dlm_domain_lock);
-
-        if (dlm->dlm_state == DLM_CTXT_JOINED)
-                ret = 1;
-
-        spin_unlock(&dlm_domain_lock);
-
-        return ret;
-}
-
 int dlm_shutting_down(struct dlm_ctxt *dlm)
 {
         int ret = 0;
diff --git a/fs/ocfs2/dlm/dlmdomain.h b/fs/ocfs2/dlm/dlmdomain.h
index 2f7f60bfeb3b..fd6122a38dbd 100644
--- a/fs/ocfs2/dlm/dlmdomain.h
+++ b/fs/ocfs2/dlm/dlmdomain.h
@@ -28,7 +28,6 @@
 extern spinlock_t dlm_domain_lock;
 extern struct list_head dlm_domains;
 
-int dlm_joined(struct dlm_ctxt *dlm);
 int dlm_shutting_down(struct dlm_ctxt *dlm);
 void dlm_fire_domain_eviction_callbacks(struct dlm_ctxt *dlm,
                                         int node_num);
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index cecd875653e4..ce12e0b1a31f 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1070,6 +1070,9 @@ static void dlm_move_reco_locks_to_list(struct dlm_ctxt *dlm,
                                              dead_node, dlm->name);
                                         list_del_init(&lock->list);
                                         dlm_lock_put(lock);
+                                        /* Can't schedule DLM_UNLOCK_FREE_LOCK
+                                         * - do manually */
+                                        dlm_lock_put(lock);
                                         break;
                                 }
                         }
@@ -2346,6 +2349,10 @@ static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node)
                                                      dead_node, dlm->name);
                                                 list_del_init(&lock->list);
                                                 dlm_lock_put(lock);
+                                                /* Can't schedule
+                                                 * DLM_UNLOCK_FREE_LOCK
+                                                 * - do manually */
+                                                dlm_lock_put(lock);
                                                 break;
                                         }
                                 }
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 1c423af04c69..11849a44dc5a 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3750,6 +3750,9 @@ static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres,
                         break;
                 spin_unlock(&dentry_attach_lock);
 
+                if (S_ISDIR(dl->dl_inode->i_mode))
+                        shrink_dcache_parent(dentry);
+
                 mlog(0, "d_delete(%pd);\n", dentry);
 
                 /*
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 3950693dd0f6..245db4f504da 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -569,7 +569,7 @@ static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
         handle_t *handle = NULL;
         struct ocfs2_alloc_context *data_ac = NULL;
         struct ocfs2_alloc_context *meta_ac = NULL;
-        enum ocfs2_alloc_restarted why;
+        enum ocfs2_alloc_restarted why = RESTART_NONE;
         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
         struct ocfs2_extent_tree et;
         int did_quota = 0;
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 4f502382180f..d10860fde165 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1447,7 +1447,6 @@ bail:
          * requires that we call do_exit().  And it isn't exported, but
          * complete_and_exit() seems to be a minimal wrapper around it. */
         complete_and_exit(NULL, status);
-        return status;
 }
 
 void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num)
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 10d66c75cecb..9581d190f6e1 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -173,7 +173,6 @@ out:
 static const struct vm_operations_struct ocfs2_file_vm_ops = {
         .fault          = ocfs2_fault,
         .page_mkwrite   = ocfs2_page_mkwrite,
-        .remap_pages    = generic_file_remap_pages,
 };
 
 int ocfs2_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 7d6b7d090452..fdbcbfed529e 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -279,6 +279,8 @@ enum ocfs2_mount_options
                                                      writes */
         OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
         OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
+
+        OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15,  /* Journal Async Commit */
 };
 
 #define OCFS2_OSB_SOFT_RO       0x0001
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index 89c0b2620814..3d0b63d34225 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -73,12 +73,6 @@ static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
                ol_dqblk_block_off(sb, c, off);
 }
 
-/* Compute block number from given offset */
-static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
-{
-        return off >> sb->s_blocksize_bits;
-}
-
 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
 {
         return off & ((1 << sb->s_blocksize_bits) - 1);
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index d81f6e2a97f5..ee541f92dab4 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -2428,8 +2428,6 @@ static int ocfs2_calc_refcount_meta_credits(struct super_block *sb,
                         get_bh(prev_bh);
                 }
 
-                rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data;
-
                 trace_ocfs2_calc_refcount_meta_credits_iterate(
                                 recs_add, (unsigned long long)cpos, clusters,
                                 (unsigned long long)le64_to_cpu(rec.r_cpos),
diff --git a/fs/ocfs2/reservations.c b/fs/ocfs2/reservations.c
index 41ffd36c689c..6a348b0294ab 100644
--- a/fs/ocfs2/reservations.c
+++ b/fs/ocfs2/reservations.c
@@ -39,7 +39,7 @@
 #define OCFS2_CHECK_RESERVATIONS
 #endif
 
-DEFINE_SPINLOCK(resv_lock);
+static DEFINE_SPINLOCK(resv_lock);
 
 #define OCFS2_MIN_RESV_WINDOW_BITS      8
 #define OCFS2_MAX_RESV_WINDOW_BITS      1024
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 706c71c2955d..87a1f7679d9b 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -191,6 +191,7 @@ enum {
         Opt_coherency_full,
         Opt_resv_level,
         Opt_dir_resv_level,
+        Opt_journal_async_commit,
         Opt_err,
 };
 
@@ -222,6 +223,7 @@ static const match_table_t tokens = {
         {Opt_coherency_full, "coherency=full"},
         {Opt_resv_level, "resv_level=%u"},
         {Opt_dir_resv_level, "dir_resv_level=%u"},
+        {Opt_journal_async_commit, "journal_async_commit"},
         {Opt_err, NULL}
 };
 
@@ -1470,6 +1472,9 @@ static int ocfs2_parse_options(struct super_block *sb,
                             option < OCFS2_MAX_RESV_LEVEL)
                                 mopt->dir_resv_level = option;
                         break;
+                case Opt_journal_async_commit:
+                        mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
+                        break;
                 default:
                         mlog(ML_ERROR,
                              "Unrecognized mount option \"%s\" "
@@ -1576,6 +1581,9 @@ static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
         if (osb->osb_dir_resv_level != osb->osb_resv_level)
                 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
 
+        if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
+                seq_printf(s, ",journal_async_commit");
+
         return 0;
 }
 
@@ -2445,6 +2453,15 @@ static int ocfs2_check_volume(struct ocfs2_super *osb)
                 goto finally;
         }
 
+        if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
+                jbd2_journal_set_features(osb->journal->j_journal,
+                                JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+                                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+        else
+                jbd2_journal_clear_features(osb->journal->j_journal,
+                                JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+                                JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+
         if (dirty) {
                 /* recover my local alloc if we didn't unmount cleanly. */
                 status = ocfs2_begin_local_alloc_recovery(osb,
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 662f8dee149f..85b190dc132f 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -5334,16 +5334,6 @@ out:
         return ret;
 }
 
-static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
-                                        struct ocfs2_xattr_bucket *bucket,
-                                        int offs)
-{
-        int block_off = offs >> inode->i_sb->s_blocksize_bits;
-
-        offs = offs % inode->i_sb->s_blocksize;
-        return bucket_block(bucket, block_off) + offs;
-}
-
 /*
  * Truncate the specified xe_off entry in xattr bucket.
  * bucket is indicated by header_bh and len is the new length.