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H A Dinode.cdiff 4df3d265bf8f3762e1d77f554ee279c39dedb020 Mon Jan 28 22:58:29 CST 2008 Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> ext4: Take read lock during overwrite case.

When we are overwriting a file and not actually allocating new file system
blocks we need to take only the read lock on i_data_sem.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>