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由 Abhishek Kulkarni 提交于
->get_sb can fail causing some badness. this patch fixes * clear sb->fs_s_info in kill_sb. * deactivate_locked_super() calls kill_sb (v9fs_kill_super) which closes the destroys the client, clunks all its fids and closes the v9fs session. Attempting to do it twice will cause an oops. Signed-off-by: NAbhishek Kulkarni <adkulkar@umail.iu.edu> Signed-off-by: NEric Van Hensbergen <ericvh@gmail.com>
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