[PATCH] fix create_write_pipe() error check
The return value of create_write_pipe()/create_read_pipe() should be checked by IS_ERR(). Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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