[PATCH 0/2 -v3] ext4: scoped NOFS for the handle in nojournal mode

This patch series makes it safe to remove the GFP_NOFS flag when an
active is handle and slightly optimized the data layout of the jbd2
handle.

Theodore Ts'o (2):
  ext4: enable scoped NOFS when starting a handle in nojournal mode
  jbd2: align h_type and h_line_no in the handle structure on byte
    boundaries

 fs/ext4/ext4_jbd2.c  | 36 ++++++++++++++++++++++--------------
 fs/ext4/ext4_jbd2.h  |  6 +-----
 fs/jbd2/journal.c    |  1 +
 include/linux/jbd2.h | 11 ++++++-----
 4 files changed, 30 insertions(+), 24 deletions(-)

Changes in v3:
  * Export ext4_handle_cache to fix a build break when ext4 is
    compiled as module
  * Add an optimization in how h_type and h_line_no is laid out
    in the jbd2_journal_handle structure.
Link to v2: https://lore.kernel.org/r/[email protected]

Changes in v2:
  * Remove an unused variable in ext4_get_nojournal()
  * Add a safety check in case ext4_handle_valid() is passed a NULL
    pointer, even though the fucntion is documented that the caller
    must not be called with a NULL handle.
Link to v1: https://lore.kernel.org/r/[email protected]

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2.53.0