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    Subject[PATCH 4.9 082/119] ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Al Viro <viro@zeniv.linux.org.uk>

    commit 006351ac8ead0d4a67dd3845e3ceffe650a23212 upstream.

    Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    fs/ufs/inode.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    --- a/fs/ufs/inode.c
    +++ b/fs/ufs/inode.c
    @@ -403,7 +403,9 @@ static int ufs_getfrag_block(struct inod

    if (!create) {
    phys64 = ufs_frag_map(inode, offsets, depth);
    - goto out;
    + if (phys64)
    + map_bh(bh_result, sb, phys64 + frag);
    + return 0;
    }

    /* This code entered only while writing ....? */

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