Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Fix various bug fixes in ext4 caused by races and memory allocation
  failures"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix fdatasync(2) after extent manipulation operations
  ext4: fix data corruption for mmap writes
  ext4: fix data corruption with EXT4_GET_BLOCKS_ZERO
  ext4: fix quota charging for shared xattr blocks
  ext4: remove redundant check for encrypted file on dio write path
  ext4: remove unused d_name argument from ext4_search_dir() et al.
  ext4: fix off-by-one error when writing back pages before dio read
  ext4: fix off-by-one on max nr_pages in ext4_find_unwritten_pgoff()
  ext4: keep existing extra fields when inode expands
  ext4: handle the rest of ext4_mb_load_buddy() ENOMEM errors
  ext4: fix off-by-in in loop termination in ext4_find_unwritten_pgoff()
  ext4: fix SEEK_HOLE
  jbd2: preserve original nofs flag during journal restart
  ext4: clear lockdep subtype for quota files on quota off

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 9ee4832b6f8b..2d30a6da7013 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -680,6 +680,12 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask)
 
 	rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
 	handle->h_buffer_credits = nblocks;
+	/*
+	 * Restore the original nofs context because the journal restart
+	 * is basically the same thing as journal stop and start.
+	 * start_this_handle will start a new nofs context.
+	 */
+	memalloc_nofs_restore(handle->saved_alloc_context);
 	ret = start_this_handle(journal, handle, gfp_mask);
 	return ret;
 }