Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:
  jbd: change the field "b_cow_tid" of struct journal_head from type unsigned to tid_t
  ext3.txt: update the links in the section "useful links" to the latest ones
  ext3: Fix data corruption in inodes with journalled data
  ext2: check xattr name_len before acquiring xattr_sem in ext2_xattr_get
  ext3: Fix compilation with -DDX_DEBUG
  quota: Remove unused declaration
  jbd: Use WRITE_SYNC in journal checkpoint.
  jbd: Fix oops in journal_remove_journal_head()
  ext3: Return -EINVAL when start is beyond the end of fs in ext3_trim_fs()
  ext3/ioctl.c: silence sparse warnings about different address spaces
  ext3/ext4 Documentation: remove bh/nobh since it has been deprecated
  ext3: Improve truncate error handling
  ext3: use proper little-endian bitops
  ext2: include fs.h into ext2_fs.h
  ext3: Fix oops in ext3_try_to_allocate_with_rsv()
  jbd: fix a bug of leaking jh->b_jcount
  jbd: remove dependency on __GFP_NOFAIL
  ext3: Convert ext3 to new truncate calling convention
  jbd: Add fixed tracepoints
  ext3: Add fixed tracepoints

Resolve conflicts in fs/ext3/fsync.c due to fsync locking push-down and
new fixed tracepoints.

1 files changed, 10 insertions, 2 deletions

diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index 32e6cc23bd9a..d565759d82ee 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -803,8 +803,16 @@ inserted:
                         /* We need to allocate a new block */
                         ext3_fsblk_t goal = ext3_group_first_block_no(sb,
                                                 EXT3_I(inode)->i_block_group);
-                        ext3_fsblk_t block = ext3_new_block(handle, inode,
-                                                        goal, &error);
+                        ext3_fsblk_t block;
+
+                        /*
+                         * Protect us agaist concurrent allocations to the
+                         * same inode from ext3_..._writepage(). Reservation
+                         * code does not expect racing allocations.
+                         */
+                        mutex_lock(&EXT3_I(inode)->truncate_mutex);
+                        block = ext3_new_block(handle, inode, goal, &error);
+                        mutex_unlock(&EXT3_I(inode)->truncate_mutex);
                         if (error)
                                 goto cleanup;
                         ea_idebug(inode, "creating block %d", block);