From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20070727113610.218646624@de.ibm.com> References: <20070727113348.413110503@de.ibm.com> Date: Fri, 27 Jul 2007 13:33:52 +0200 From: Martin Schwidefsky Subject: [patch 4/6] cio: Make CIO_* macros safe if dbfs are not available. Content-Disposition: inline; filename=013-cio-dbf.diff Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Cornelia Huck , Martin Schwidefsky List-ID: From: Cornelia Huck Signed-off-by: Cornelia Huck Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/cio_debug.h | 2 ++ 1 file changed, 2 insertions(+) Index: quilt-2.6/drivers/s390/cio/cio_debug.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/cio_debug.h +++ quilt-2.6/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; -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.