linux-kernel - [PATCH v4 03/14] coresight: move shared barrier_pkt[] to coresight

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Message-Id: <20180605210710.22227-4-kim.phillips@arm.com>
Date:   Tue,  5 Jun 2018 16:06:59 -0500
From:   Kim Phillips <kim.phillips@....com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     Leo Yan <leo.yan@...aro.org>,
        Suzuki K Poulose <Suzuki.Poulose@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Howells <dhowells@...hat.com>,
        Eric Auger <eric.auger@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Gargi Sharma <gs051095@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Rik van Riel <riel@...hat.com>,
        Robin Murphy <robin.murphy@....com>,
        Russell King <linux@...linux.org.uk>,
        Thierry Reding <treding@...dia.com>,
        Todd Kjos <tkjos@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kim Phillips <kim.phillips@....com>
Subject: [PATCH v4 03/14] coresight: move shared barrier_pkt[] to coresight_priv.h

barrier_pkt[] is used in the etb and tmc-etf coresight
components.  Change barrier_pkt[] to a static definition,
so as to allow them to be built as modules.

Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: Leo Yan <leo.yan@...aro.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@....com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Russell King <linux@...linux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@....com>
---
 drivers/hwtracing/coresight/coresight-priv.h | 8 +++++++-
 drivers/hwtracing/coresight/coresight.c      | 7 -------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
index 158c720119dd..e76f19ca9e04 100644
--- a/drivers/hwtracing/coresight/coresight-priv.h
+++ b/drivers/hwtracing/coresight/coresight-priv.h
@@ -57,7 +57,13 @@ static DEVICE_ATTR_RO(name)
 #define coresight_simple_reg64(type, name, lo_off, hi_off)		\
 	__coresight_simple_func(type, NULL, name, lo_off, hi_off)
 
-extern const u32 barrier_pkt[4];
+/*
+ * When losing synchronisation a new barrier packet needs to be inserted at the
+ * beginning of the data collected in a buffer.  That way the decoder knows that
+ * it needs to look for another sync sequence.
+ */
+static const u32 barrier_pkt[4] = { 0x7fffffff, 0x7fffffff,
+				    0x7fffffff, 0x7fffffff };
 #define CORESIGHT_BARRIER_PKT_SIZE (sizeof(barrier_pkt))
 
 enum etm_addr_type {
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 4969b329511c..0cbc2948defc 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -46,13 +46,6 @@ static DEFINE_PER_CPU(struct list_head *, tracer_path);
  */
 static struct list_head *stm_path;
 
-/*
- * When losing synchronisation a new barrier packet needs to be inserted at the
- * beginning of the data collected in a buffer.  That way the decoder knows that
- * it needs to look for another sync sequence.
- */
-const u32 barrier_pkt[4] = {0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
-
 static int coresight_id_match(struct device *dev, void *data)
 {
 	int trace_id, i_trace_id;
-- 
2.17.0