[PATCH 0/9] Extent buffer locking cleanups

[David Sterba <dsterba@suse.com>]

The series moves several atomic counters under CONFIG_BTRFS_DEBUG. The
selected counters are not essential for the extent buffer locking to
work. There's some space saving (4x 4B at least) and the cachelines are
less stressed on non-debugging builds.

The final size is 264 from 280, getting to 256 would be nice but hard or
making the code unreadable. I have ideas to shave 7 more bytes but
that's for another patchset.

David Sterba (9):
  btrfs: add assertion helpers for spinning writers
  btrfs: use assertion helpers for spinning writers
  btrfs: add assertion helpers for spinning readers
  btrfs: use assertion helpers for spinning readers
  btrfs: add assertion helpers for extent buffer read lock counters
  btrfs: use assertion helpers for extent buffer read lock counters
  btrfs: add assertion helpers for extent buffer write lock counters
  btrfs: use assertion helpers for extent buffer write lock counters
  btrfs: switch extent_buffer::lock_nested to bool

 fs/btrfs/extent_io.c |  13 +++--
 fs/btrfs/extent_io.h |  11 ++--
 fs/btrfs/locking.c   | 133 ++++++++++++++++++++++++++++++-------------
 3 files changed, 107 insertions(+), 50 deletions(-)

-- 
2.20.1