tree 387a9fb396f1bf24514b712c294182e36ba51076
parent fb2d5b86aff355a27ebfc132d3c99f4a940cc3fe
author Nick Piggin <npiggin@kernel.dk> 1294382967 +1100
committer Nick Piggin <npiggin@kernel.dk> 1294383019 +1100

fs: change d_compare for rcu-walk

Change d_compare so it may be called from lock-free RCU lookups. This
does put significant restrictions on what may be done from the callback,
however there don't seem to have been any problems with in-tree fses.
If some strange use case pops up that _really_ cannot cope with the
rcu-walk rules, we can just add new rcu-unaware callbacks, which would
cause name lookup to drop out of rcu-walk mode.

For in-tree filesystems, this is just a mechanical change.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>