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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:20 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:17 +1100
commit5adcee1d8d32d7f305f6f5aaefdbf8f35adca177 (patch)
tree9292ebc9bb6a21b364a97a44d1b6857a565159c5 /fs/configfs
parent3e880fb5e4bb6a012035e3edd0586ee2817c2e24 (diff)
cgroup fs: avoid switching ->d_op on live dentry
Switching d_op on a live dentry is racy in general, so avoid it. In this case it is a negative dentry, which is safer, but there are still concurrent ops which may be called on d_op in that case (eg. d_revalidate). So in general a filesystem may not do this. Fix cgroupfs so as not to do this. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
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