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(parent: 5adcee1) | patch
config fs: avoid switching ->d_op on live dentry
authorNick Piggin <npiggin@kernel.dk>
Fri, 7 Jan 2011 06:49:21 +0000 (17:49 +1100)
committerNick Piggin <npiggin@kernel.dk>
Fri, 7 Jan 2011 06:50:17 +0000 (17:50 +1100)
commitfbc8d4c04626e015b18cc61199f505920abb48f0
tree31cd59dd54966d225ae159f41308798b2d58b8a2tree | snapshot (tar.gz zip)
parent5adcee1d8d32d7f305f6f5aaefdbf8f35adca177commit | diff
config 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 configfs so as not to do this.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
fs/configfs/dir.c diff | blob | blame | history