From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/1] coresight: etm4x: Fix unused function warning
Date: Fri, 13 Dec 2019 15:31:07 -0700 [thread overview]
Message-ID: <20191213223107.1484-2-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20191213223107.1484-1-mathieu.poirier@linaro.org>
From: Arnd Bergmann <arnd@arndb.de>
Some of the newly added code in the etm4x driver is inside of an #ifdef,
and some other code is outside of it, leading to a harmless warning when
CONFIG_CPU_PM is disabled:
drivers/hwtracing/coresight/coresight-etm4x.c:68:13: error: 'etm4_os_lock' defined but not used [-Werror=unused-function]
static void etm4_os_lock(struct etmv4_drvdata *drvdata)
^~~~~~~~~~~~
To avoid the warning and simplify the the #ifdef checks, use
IS_ENABLED() instead, so the compiler can drop the unused functions
without complaining.
Fixes: f188b5e76aae ("coresight: etm4x: Save/restore state across CPU low power states")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[Fixed capital 'f' in title]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/coresight-etm4x.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index dc3f507e7562..a90d757f7043 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -1132,7 +1132,6 @@ static void etm4_init_trace_id(struct etmv4_drvdata *drvdata)
drvdata->trcid = coresight_get_trace_id(drvdata->cpu);
}
-#ifdef CONFIG_CPU_PM
static int etm4_cpu_save(struct etmv4_drvdata *drvdata)
{
int i, ret = 0;
@@ -1402,17 +1401,17 @@ static struct notifier_block etm4_cpu_pm_nb = {
static int etm4_cpu_pm_register(void)
{
- return cpu_pm_register_notifier(&etm4_cpu_pm_nb);
+ if (IS_ENABLED(CONFIG_CPU_PM))
+ return cpu_pm_register_notifier(&etm4_cpu_pm_nb);
+
+ return 0;
}
static void etm4_cpu_pm_unregister(void)
{
- cpu_pm_unregister_notifier(&etm4_cpu_pm_nb);
+ if (IS_ENABLED(CONFIG_CPU_PM))
+ cpu_pm_unregister_notifier(&etm4_cpu_pm_nb);
}
-#else
-static int etm4_cpu_pm_register(void) { return 0; }
-static void etm4_cpu_pm_unregister(void) { }
-#endif
static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
{
--
2.17.1
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next prev parent reply other threads:[~2019-12-13 22:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-13 22:31 [PATCH 0/1] coresight: Fix for v5.5-rc2 Mathieu Poirier
2019-12-13 22:31 ` Mathieu Poirier [this message]
2020-01-17 18:56 [PATCH 0/1] coresight: next v5.5-rc6 Mathieu Poirier
2020-01-17 18:56 ` [PATCH 1/1] coresight: etm4x: Fix unused function warning Mathieu Poirier
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