[PATCH 0/1]ext4: Fix for WARN_ON_ONCE when marking buffer dirty

[Pranay Kr. Srivastava]

1) Fix WARN_ON_ONCE when marking buffer dirty
   it's possible that a writeback for the super block
   buffer head is triggered after setting the buffer
   uptodate on a buffer write_io_error.

   If however there's an error while writing the buffer
   head then the buffer is cleared from being uptodate.

   If the buffer uptodate is not set while calling
   mark_buffer_dirty, it throws a WARN_ON_ONCE.
   This patch fixes it by locking the buffer while marking
   the buffer uptodate and then marking it dirty while holding
   the buffer head lock.


Pranay Kr. Srivastava (5):
   Fix WARN_ON_ONCE when marking buffer dirty

 fs/ext4/super.c     |  30 +++++-----
 1 files changed, 16 insertions(+), 14 deletions(-)

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1.9.1