From 303fa9e39605c1d56971dd22cd04d2186dc42c98 Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Fri, 27 Jul 2007 12:29:20 +0200 Subject: [S390] cio: Make CIO_* macros safe if dbfs are not available. Signed-off-by: Cornelia Huck Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/cio_debug.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/s390') diff --git a/drivers/s390/cio/cio_debug.h b/drivers/s390/cio/cio_debug.h index f88844adae1..c9bf8989930 100644 --- a/drivers/s390/cio/cio_debug.h +++ b/drivers/s390/cio/cio_debug.h @@ -23,6 +23,8 @@ extern debug_info_t *cio_debug_crw_id; static inline void CIO_HEX_EVENT(int level, void *data, int length) { + if (unlikely(!cio_debug_trace_id)) + return; while (length > 0) { debug_event(cio_debug_trace_id, level, data, length); length -= cio_debug_trace_id->buf_size; -- cgit v1.2.3