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authorJosef Bacik <josef@redhat.com>2011-09-18 10:34:03 -0400
committerChris Mason <chris.mason@oracle.com>2011-09-18 10:34:03 -0400
commita66e7cc626f42de6c745963fe0d807518fa49d39 (patch)
tree22a508ec3e8735c2e42cbde62f62967d5c25e3e9 /arch
parent48802c8ae2a9d618ec734a61283d645ad527e06c (diff)
downloadlinux-linaro-stable-a66e7cc626f42de6c745963fe0d807518fa49d39.tar.gz
Btrfs: only clear the need lookup flag after the dentry is setup
We can race with readdir and the RCU path walking stuff. This is because we clear the need lookup flag before actually instantiating the inode. This will lead the RCU path walk stuff to find a dentry it thinks is valid without a d_inode attached. So instead unhash the dentry when we first start the lookup, and then clear the flag after we've instantiated the dentry so we're garunteed to either try the slow lookup, or have the d_inode set properly. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'arch')
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