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fs/9p: Fix race in initializing writeback fid
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tue, 8 Mar 2011 11:09:46 +0000 (16:39 +0530)
committerEric Van Hensbergen <ericvh@gmail.com>
Tue, 22 Mar 2011 20:43:35 +0000 (15:43 -0500)
When two process open the same file we can end up with both of them
allocating the writeback_fid. Add a new mutex which can be used
for synchronizing v9fs_inode member values.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

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