15 files changed, 170 insertions, 83 deletions

diff --git a/fs/aio.c b/fs/aio.c
index 8fa77e233944..76da12537956 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -443,7 +443,7 @@ static struct kiocb *__aio_get_req(struct kioctx *ctx)
         req->private = NULL;
         req->ki_iovec = NULL;
         INIT_LIST_HEAD(&req->ki_run_list);
-        req->ki_eventfd = ERR_PTR(-EINVAL);
+        req->ki_eventfd = NULL;
 
         /* Check if the completion queue has enough free space to
          * accept an event from this io.
@@ -485,8 +485,6 @@ static inline void really_put_req(struct kioctx *ctx, struct kiocb *req)
 {
         assert_spin_locked(&ctx->ctx_lock);
 
-        if (!IS_ERR(req->ki_eventfd))
-                fput(req->ki_eventfd);
         if (req->ki_dtor)
                 req->ki_dtor(req);
         if (req->ki_iovec != &req->ki_inline_vec)
@@ -508,8 +506,11 @@ static void aio_fput_routine(struct work_struct *data)
                 list_del(&req->ki_list);
                 spin_unlock_irq(&fput_lock);
 
-                /* Complete the fput */
-                __fput(req->ki_filp);
+                /* Complete the fput(s) */
+                if (req->ki_filp != NULL)
+                        __fput(req->ki_filp);
+                if (req->ki_eventfd != NULL)
+                        __fput(req->ki_eventfd);
 
                 /* Link the iocb into the context's free list */
                 spin_lock_irq(&ctx->ctx_lock);
@@ -527,12 +528,14 @@ static void aio_fput_routine(struct work_struct *data)
  */
 static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
 {
+        int schedule_putreq = 0;
+
         dprintk(KERN_DEBUG "aio_put(%p): f_count=%ld\n",
                 req, atomic_long_read(&req->ki_filp->f_count));
 
         assert_spin_locked(&ctx->ctx_lock);
 
-        req->ki_users --;
+        req->ki_users--;
         BUG_ON(req->ki_users < 0);
         if (likely(req->ki_users))
                 return 0;
@@ -540,10 +543,23 @@ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
         req->ki_cancel = NULL;
         req->ki_retry = NULL;
 
-        /* Must be done under the lock to serialise against cancellation.
-         * Call this aio_fput as it duplicates fput via the fput_work.
+        /*
+         * Try to optimize the aio and eventfd file* puts, by avoiding to
+         * schedule work in case it is not __fput() time. In normal cases,
+         * we would not be holding the last reference to the file*, so
+         * this function will be executed w/out any aio kthread wakeup.
          */
-        if (unlikely(atomic_long_dec_and_test(&req->ki_filp->f_count))) {
+        if (unlikely(atomic_long_dec_and_test(&req->ki_filp->f_count)))
+                schedule_putreq++;
+        else
+                req->ki_filp = NULL;
+        if (req->ki_eventfd != NULL) {
+                if (unlikely(atomic_long_dec_and_test(&req->ki_eventfd->f_count)))
+                        schedule_putreq++;
+                else
+                        req->ki_eventfd = NULL;
+        }
+        if (unlikely(schedule_putreq)) {
                 get_ioctx(ctx);
                 spin_lock(&fput_lock);
                 list_add(&req->ki_list, &fput_head);
@@ -571,7 +587,7 @@ int aio_put_req(struct kiocb *req)
 static struct kioctx *lookup_ioctx(unsigned long ctx_id)
 {
         struct mm_struct *mm = current->mm;
-        struct kioctx *ctx = NULL;
+        struct kioctx *ctx, *ret = NULL;
         struct hlist_node *n;
 
         rcu_read_lock();
@@ -579,12 +595,13 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id)
         hlist_for_each_entry_rcu(ctx, n, &mm->ioctx_list, list) {
                 if (ctx->user_id == ctx_id && !ctx->dead) {
                         get_ioctx(ctx);
+                        ret = ctx;
                         break;
                 }
         }
 
         rcu_read_unlock();
-        return ctx;
+        return ret;
 }
 
 /*
@@ -1009,7 +1026,7 @@ int aio_complete(struct kiocb *iocb, long res, long res2)
          * eventfd. The eventfd_signal() function is safe to be called
          * from IRQ context.
          */
-        if (!IS_ERR(iocb->ki_eventfd))
+        if (iocb->ki_eventfd != NULL)
                 eventfd_signal(iocb->ki_eventfd, 1);
 
 put_rq:
@@ -1608,6 +1625,7 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
                 req->ki_eventfd = eventfd_fget((int) iocb->aio_resfd);
                 if (IS_ERR(req->ki_eventfd)) {
                         ret = PTR_ERR(req->ki_eventfd);
+                        req->ki_eventfd = NULL;
                         goto out_put_req;
                 }
         }
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 82491ba8fa40..5e1d4e30e9d8 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -784,7 +784,14 @@ struct btrfs_fs_info {
         struct list_head dirty_cowonly_roots;
 
         struct btrfs_fs_devices *fs_devices;
+
+        /*
+         * the space_info list is almost entirely read only.  It only changes
+         * when we add a new raid type to the FS, and that happens
+         * very rarely.  RCU is used to protect it.
+         */
         struct list_head space_info;
+
         spinlock_t delalloc_lock;
         spinlock_t new_trans_lock;
         u64 delalloc_bytes;
@@ -1797,6 +1804,8 @@ int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
+void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
+
 int btrfs_check_metadata_free_space(struct btrfs_root *root);
 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
                                 u64 bytes);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 9abf81f71c46..fefe83ad2059 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -20,6 +20,7 @@
 #include <linux/writeback.h>
 #include <linux/blkdev.h>
 #include <linux/sort.h>
+#include <linux/rcupdate.h>
 #include "compat.h"
 #include "hash.h"
 #include "crc32c.h"
@@ -330,13 +331,33 @@ static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,
 {
         struct list_head *head = &info->space_info;
         struct btrfs_space_info *found;
-        list_for_each_entry(found, head, list) {
-                if (found->flags == flags)
+
+        rcu_read_lock();
+        list_for_each_entry_rcu(found, head, list) {
+                if (found->flags == flags) {
+                        rcu_read_unlock();
                         return found;
+                }
         }
+        rcu_read_unlock();
         return NULL;
 }
 
+/*
+ * after adding space to the filesystem, we need to clear the full flags
+ * on all the space infos.
+ */
+void btrfs_clear_space_info_full(struct btrfs_fs_info *info)
+{
+        struct list_head *head = &info->space_info;
+        struct btrfs_space_info *found;
+
+        rcu_read_lock();
+        list_for_each_entry_rcu(found, head, list)
+                found->full = 0;
+        rcu_read_unlock();
+}
+
 static u64 div_factor(u64 num, int factor)
 {
         if (factor == 10)
@@ -1903,7 +1924,6 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
         if (!found)
                 return -ENOMEM;
 
-        list_add(&found->list, &info->space_info);
         INIT_LIST_HEAD(&found->block_groups);
         init_rwsem(&found->groups_sem);
         spin_lock_init(&found->lock);
@@ -1917,6 +1937,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
         found->full = 0;
         found->force_alloc = 0;
         *space_info = found;
+        list_add_rcu(&found->list, &info->space_info);
         return 0;
 }
 
@@ -6320,6 +6341,7 @@ out:
 int btrfs_free_block_groups(struct btrfs_fs_info *info)
 {
         struct btrfs_block_group_cache *block_group;
+        struct btrfs_space_info *space_info;
         struct rb_node *n;
 
         spin_lock(&info->block_group_cache_lock);
@@ -6341,6 +6363,23 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
                 spin_lock(&info->block_group_cache_lock);
         }
         spin_unlock(&info->block_group_cache_lock);
+
+        /* now that all the block groups are freed, go through and
+         * free all the space_info structs.  This is only called during
+         * the final stages of unmount, and so we know nobody is
+         * using them.  We call synchronize_rcu() once before we start,
+         * just to be on the safe side.
+         */
+        synchronize_rcu();
+
+        while(!list_empty(&info->space_info)) {
+                space_info = list_entry(info->space_info.next,
+                                        struct btrfs_space_info,
+                                        list);
+
+                list_del(&space_info->list);
+                kfree(space_info);
+        }
         return 0;
 }
 
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 1316139bf9e8..dd06e18e5aac 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1374,6 +1374,12 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
                 ret = btrfs_add_device(trans, root, device);
         }
 
+        /*
+         * we've got more storage, clear any full flags on the space
+         * infos
+         */
+        btrfs_clear_space_info_full(root->fs_info);
+
         unlock_chunks(root);
         btrfs_commit_transaction(trans, root);
 
@@ -1459,6 +1465,8 @@ static int __btrfs_grow_device(struct btrfs_trans_handle *trans,
         device->fs_devices->total_rw_bytes += diff;
 
         device->total_bytes = new_size;
+        btrfs_clear_space_info_full(device->dev_root->fs_info);
+
         return btrfs_update_device(trans, device);
 }
 
diff --git a/fs/buffer.c b/fs/buffer.c
index 9f697419ed8e..891e1c78e4f1 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -760,15 +760,9 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
  * If warn is true, then emit a warning if the page is not uptodate and has
  * not been truncated.
  */
-static int __set_page_dirty(struct page *page,
+static void __set_page_dirty(struct page *page,
                 struct address_space *mapping, int warn)
 {
-        if (unlikely(!mapping))
-                return !TestSetPageDirty(page);
-
-        if (TestSetPageDirty(page))
-                return 0;
-
         spin_lock_irq(&mapping->tree_lock);
         if (page->mapping) {    /* Race with truncate? */
                 WARN_ON_ONCE(warn && !PageUptodate(page));
@@ -785,8 +779,6 @@ static int __set_page_dirty(struct page *page,
         }
         spin_unlock_irq(&mapping->tree_lock);
         __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
-
-        return 1;
 }
 
 /*
@@ -816,6 +808,7 @@ static int __set_page_dirty(struct page *page,
  */
 int __set_page_dirty_buffers(struct page *page)
 {
+        int newly_dirty;
         struct address_space *mapping = page_mapping(page);
 
         if (unlikely(!mapping))
@@ -831,9 +824,12 @@ int __set_page_dirty_buffers(struct page *page)
                         bh = bh->b_this_page;
                 } while (bh != head);
         }
+        newly_dirty = !TestSetPageDirty(page);
         spin_unlock(&mapping->private_lock);
 
-        return __set_page_dirty(page, mapping, 1);
+        if (newly_dirty)
+                __set_page_dirty(page, mapping, 1);
+        return newly_dirty;
 }
 EXPORT_SYMBOL(__set_page_dirty_buffers);
 
@@ -1262,8 +1258,11 @@ void mark_buffer_dirty(struct buffer_head *bh)
                         return;
         }
 
-        if (!test_set_buffer_dirty(bh))
-                __set_page_dirty(bh->b_page, page_mapping(bh->b_page), 0);
+        if (!test_set_buffer_dirty(bh)) {
+                struct page *page = bh->b_page;
+                if (!TestSetPageDirty(page))
+                        __set_page_dirty(page, page_mapping(page), 0);
+        }
 }
 
 /*
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index bdca1f4b3a3e..8b65f289ee00 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1324,14 +1324,13 @@ static int ecryptfs_write_headers_virt(char *page_virt, size_t max,
 }
 
 static int
-ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat,
-                                    struct dentry *ecryptfs_dentry,
-                                    char *virt)
+ecryptfs_write_metadata_to_contents(struct dentry *ecryptfs_dentry,
+                                    char *virt, size_t virt_len)
 {
         int rc;
 
         rc = ecryptfs_write_lower(ecryptfs_dentry->d_inode, virt,
-                                  0, crypt_stat->num_header_bytes_at_front);
+                                  0, virt_len);
         if (rc)
                 printk(KERN_ERR "%s: Error attempting to write header "
                        "information to lower file; rc = [%d]\n", __func__,
@@ -1341,7 +1340,6 @@ ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat,
 
 static int
 ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
-                                 struct ecryptfs_crypt_stat *crypt_stat,
                                  char *page_virt, size_t size)
 {
         int rc;
@@ -1351,6 +1349,17 @@ ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
         return rc;
 }
 
+static unsigned long ecryptfs_get_zeroed_pages(gfp_t gfp_mask,
+                                               unsigned int order)
+{
+        struct page *page;
+
+        page = alloc_pages(gfp_mask | __GFP_ZERO, order);
+        if (page)
+                return (unsigned long) page_address(page);
+        return 0;
+}
+
 /**
  * ecryptfs_write_metadata
  * @ecryptfs_dentry: The eCryptfs dentry
@@ -1367,7 +1376,9 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry)
 {
         struct ecryptfs_crypt_stat *crypt_stat =
                 &ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat;
+        unsigned int order;
         char *virt;
+        size_t virt_len;
         size_t size = 0;
         int rc = 0;
 
@@ -1383,33 +1394,35 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry)
                 rc = -EINVAL;
                 goto out;
         }
+        virt_len = crypt_stat->num_header_bytes_at_front;
+        order = get_order(virt_len);
         /* Released in this function */
-        virt = (char *)get_zeroed_page(GFP_KERNEL);
+        virt = (char *)ecryptfs_get_zeroed_pages(GFP_KERNEL, order);
         if (!virt) {
                 printk(KERN_ERR "%s: Out of memory\n", __func__);
                 rc = -ENOMEM;
                 goto out;
         }
-        rc = ecryptfs_write_headers_virt(virt, PAGE_CACHE_SIZE, &size,
-                                         crypt_stat, ecryptfs_dentry);
+        rc = ecryptfs_write_headers_virt(virt, virt_len, &size, crypt_stat,
+                                         ecryptfs_dentry);
         if (unlikely(rc)) {
                 printk(KERN_ERR "%s: Error whilst writing headers; rc = [%d]\n",
                        __func__, rc);
                 goto out_free;
         }
         if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
-                rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry,
-                                                      crypt_stat, virt, size);
+                rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, virt,
+                                                      size);
         else
-                rc = ecryptfs_write_metadata_to_contents(crypt_stat,
-                                                         ecryptfs_dentry, virt);
+                rc = ecryptfs_write_metadata_to_contents(ecryptfs_dentry, virt,
+                                                         virt_len);
         if (rc) {
                 printk(KERN_ERR "%s: Error writing metadata out to lower file; "
                        "rc = [%d]\n", __func__, rc);
                 goto out_free;
         }
 out_free:
-        free_page((unsigned long)virt);
+        free_pages((unsigned long)virt, order);
 out:
         return rc;
 }
@@ -2208,17 +2221,19 @@ int ecryptfs_decode_and_decrypt_filename(char **plaintext_name,
                                          struct dentry *ecryptfs_dir_dentry,
                                          const char *name, size_t name_size)
 {
+        struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
+                &ecryptfs_superblock_to_private(
+                        ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
         char *decoded_name;
         size_t decoded_name_size;
         size_t packet_size;
         int rc = 0;
 
-        if ((name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
+        if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+            && !(mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED)
+            && (name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
             && (strncmp(name, ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX,
                         ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE) == 0)) {
-                struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
-                        &ecryptfs_superblock_to_private(
-                                ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
                 const char *orig_name = name;
                 size_t orig_name_size = name_size;
 
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index eb2267eca1fe..ac749d4d644f 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -620,7 +620,6 @@ int ecryptfs_interpose(struct dentry *hidden_dentry,
                        u32 flags);
 int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
                                         struct dentry *lower_dentry,
-                                        struct ecryptfs_crypt_stat *crypt_stat,
                                         struct inode *ecryptfs_dir_inode,
                                         struct nameidata *ecryptfs_nd);
 int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 5697899a168d..55b3145b8072 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -246,7 +246,6 @@ out:
  */
 int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
                                         struct dentry *lower_dentry,
-                                        struct ecryptfs_crypt_stat *crypt_stat,
                                         struct inode *ecryptfs_dir_inode,
                                         struct nameidata *ecryptfs_nd)
 {
@@ -254,6 +253,7 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
         struct vfsmount *lower_mnt;
         struct inode *lower_inode;
         struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
+        struct ecryptfs_crypt_stat *crypt_stat;
         char *page_virt = NULL;
         u64 file_size;
         int rc = 0;
@@ -314,6 +314,11 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
                         goto out_free_kmem;
                 }
         }
+        crypt_stat = &ecryptfs_inode_to_private(
+                                        ecryptfs_dentry->d_inode)->crypt_stat;
+        /* TODO: lock for crypt_stat comparison */
+        if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
+                        ecryptfs_set_default_sizes(crypt_stat);
         rc = ecryptfs_read_and_validate_header_region(page_virt,
                                                       ecryptfs_dentry->d_inode);
         if (rc) {
@@ -362,9 +367,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
 {
         char *encrypted_and_encoded_name = NULL;
         size_t encrypted_and_encoded_name_size;
-        struct ecryptfs_crypt_stat *crypt_stat = NULL;
         struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
-        struct ecryptfs_inode_info *inode_info;
         struct dentry *lower_dir_dentry, *lower_dentry;
         int rc = 0;
 
@@ -388,26 +391,15 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
         }
         if (lower_dentry->d_inode)
                 goto lookup_and_interpose;
-        inode_info =  ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
-        if (inode_info) {
-                crypt_stat = &inode_info->crypt_stat;
-                /* TODO: lock for crypt_stat comparison */
-                if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
-                        ecryptfs_set_default_sizes(crypt_stat);
-        }
-        if (crypt_stat)
-                mount_crypt_stat = crypt_stat->mount_crypt_stat;
-        else
-                mount_crypt_stat = &ecryptfs_superblock_to_private(
-                        ecryptfs_dentry->d_sb)->mount_crypt_stat;
-        if (!(crypt_stat && (crypt_stat->flags & ECRYPTFS_ENCRYPT_FILENAMES))
-            && !(mount_crypt_stat && (mount_crypt_stat->flags
-                                     & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)))
+        mount_crypt_stat = &ecryptfs_superblock_to_private(
+                                ecryptfs_dentry->d_sb)->mount_crypt_stat;
+        if (!(mount_crypt_stat
+            && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)))
                 goto lookup_and_interpose;
         dput(lower_dentry);
         rc = ecryptfs_encrypt_and_encode_filename(
                 &encrypted_and_encoded_name, &encrypted_and_encoded_name_size,
-                crypt_stat, mount_crypt_stat, ecryptfs_dentry->d_name.name,
+                NULL, mount_crypt_stat, ecryptfs_dentry->d_name.name,
                 ecryptfs_dentry->d_name.len);
         if (rc) {
                 printk(KERN_ERR "%s: Error attempting to encrypt and encode "
@@ -426,7 +418,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
         }
 lookup_and_interpose:
         rc = ecryptfs_lookup_and_interpose_lower(ecryptfs_dentry, lower_dentry,
-                                                 crypt_stat, ecryptfs_dir_inode,
+                                                 ecryptfs_dir_inode,
                                                  ecryptfs_nd);
         goto out;
 out_d_drop:
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e2eab196875f..e0aa4fe4f596 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1122,7 +1122,8 @@ ext4_ext_search_right(struct inode *inode, struct ext4_ext_path *path,
         struct ext4_extent_idx *ix;
         struct ext4_extent *ex;
         ext4_fsblk_t block;
-        int depth, ee_len;
+        int depth;      /* Note, NOT eh_depth; depth from top of tree */
+        int ee_len;
 
         BUG_ON(path == NULL);
         depth = path->p_depth;
@@ -1179,7 +1180,8 @@ got_index:
                 if (bh == NULL)
                         return -EIO;
                 eh = ext_block_hdr(bh);
-                if (ext4_ext_check_header(inode, eh, depth)) {
+                /* subtract from p_depth to get proper eh_depth */
+                if (ext4_ext_check_header(inode, eh, path->p_depth - depth)) {
                         put_bh(bh);
                         return -EIO;
                 }
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 627f8c3337a3..2d2b3585ee91 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -698,6 +698,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
         struct inode *ret;
         ext4_group_t i;
         int free = 0;
+        static int once = 1;
         ext4_group_t flex_group;
 
         /* Cannot create files in a deleted directory */
@@ -719,7 +720,8 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
                 ret2 = find_group_flex(sb, dir, &group);
                 if (ret2 == -1) {
                         ret2 = find_group_other(sb, dir, &group);
-                        if (ret2 == 0 && printk_ratelimit())
+                        if (ret2 == 0 && once)
+                                once = 0;
                                 printk(KERN_NOTICE "ext4: find_group_flex "
                                        "failed, fallback succeeded dir %lu\n",
                                        dir->i_ino);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 4415beeb0b62..9f61e62f435f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1447,7 +1447,7 @@ static void ext4_mb_measure_extent(struct ext4_allocation_context *ac,
         struct ext4_free_extent *gex = &ac->ac_g_ex;
 
         BUG_ON(ex->fe_len <= 0);
-        BUG_ON(ex->fe_len >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
+        BUG_ON(ex->fe_len > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
         BUG_ON(ex->fe_start >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
         BUG_ON(ac->ac_status != AC_STATUS_CONTINUE);
 
@@ -3292,7 +3292,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
         }
         BUG_ON(start + size <= ac->ac_o_ex.fe_logical &&
                         start > ac->ac_o_ex.fe_logical);
-        BUG_ON(size <= 0 || size >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
+        BUG_ON(size <= 0 || size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
 
         /* now prepare goal request */
 
@@ -3589,6 +3589,7 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
                         struct super_block *sb, struct ext4_prealloc_space *pa)
 {
         ext4_group_t grp;
+        ext4_fsblk_t grp_blk;
 
         if (!atomic_dec_and_test(&pa->pa_count) || pa->pa_free != 0)
                 return;
@@ -3603,8 +3604,12 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
         pa->pa_deleted = 1;
         spin_unlock(&pa->pa_lock);
 
-        /* -1 is to protect from crossing allocation group */
-        ext4_get_group_no_and_offset(sb, pa->pa_pstart - 1, &grp, NULL);
+        grp_blk = pa->pa_pstart;
+        /* If linear, pa_pstart may be in the next group when pa is used up */
+        if (pa->pa_linear)
+                grp_blk--;
+
+        ext4_get_group_no_and_offset(sb, grp_blk, &grp, NULL);
 
         /*
          * possible race:
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index d1d1eb84679d..618865b3128b 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- *  Copyright (C) 1996  Gertjan van Wingerde    (gertjan@cs.vu.nl)
+ *  Copyright (C) 1996  Gertjan van Wingerde
  *      Minix V2 fs support.
  *
  *  Modified for 680x0 by Andreas Schwab
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index f65953be39c0..9250067943d8 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2596,6 +2596,7 @@ static nfsd4_enc nfsd4_enc_ops[] = {
         [OP_LOOKUPP]            = (nfsd4_enc)nfsd4_encode_noop,
         [OP_NVERIFY]            = (nfsd4_enc)nfsd4_encode_noop,
         [OP_OPEN]               = (nfsd4_enc)nfsd4_encode_open,
+        [OP_OPENATTR]           = (nfsd4_enc)nfsd4_encode_noop,
         [OP_OPEN_CONFIRM]       = (nfsd4_enc)nfsd4_encode_open_confirm,
         [OP_OPEN_DOWNGRADE]     = (nfsd4_enc)nfsd4_encode_open_downgrade,
         [OP_PUTFH]              = (nfsd4_enc)nfsd4_encode_noop,
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 0c9de19a1633..beaa0ce3b82e 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3066,7 +3066,6 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
         int retval = -ENOENT;
         ino_t ino;
         int tid;
-        unsigned long pos = filp->f_pos;  /* avoiding "long long" filp->f_pos */
         struct pid_namespace *ns;
 
         task = get_proc_task(inode);
@@ -3083,18 +3082,18 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
                 goto out_no_task;
         retval = 0;
 
-        switch (pos) {
+        switch ((unsigned long)filp->f_pos) {
         case 0:
                 ino = inode->i_ino;
-                if (filldir(dirent, ".", 1, pos, ino, DT_DIR) < 0)
+                if (filldir(dirent, ".", 1, filp->f_pos, ino, DT_DIR) < 0)
                         goto out;
-                pos++;
+                filp->f_pos++;
                 /* fall through */
         case 1:
                 ino = parent_ino(dentry);
-                if (filldir(dirent, "..", 2, pos, ino, DT_DIR) < 0)
+                if (filldir(dirent, "..", 2, filp->f_pos, ino, DT_DIR) < 0)
                         goto out;
-                pos++;
+                filp->f_pos++;
                 /* fall through */
         }
 
@@ -3104,9 +3103,9 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
         ns = filp->f_dentry->d_sb->s_fs_info;
         tid = (int)filp->f_version;
         filp->f_version = 0;
-        for (task = first_tid(leader, tid, pos - 2, ns);
+        for (task = first_tid(leader, tid, filp->f_pos - 2, ns);
              task;
-             task = next_tid(task), pos++) {
+             task = next_tid(task), filp->f_pos++) {
                 tid = task_pid_nr_ns(task, ns);
                 if (proc_task_fill_cache(filp, dirent, filldir, task, tid) < 0) {
                         /* returning this tgid failed, save it as the first
@@ -3117,7 +3116,6 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
                 }
         }
 out:
-        filp->f_pos = pos;
         put_task_struct(leader);
 out_no_task:
         return retval;
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index e65212dfb60e..261a1c2f22dd 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -41,7 +41,7 @@
  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  *
  * Module usage counts added on 96/04/29 by
- * Gertjan van Wingerde <gertjan@cs.vu.nl>
+ * Gertjan van Wingerde <gwingerde@gmail.com>
  *
  * Clean swab support on 19970406 by
  * Francois-Rene Rideau <fare@tunes.org>