linux-kernel - [PATCH v2 2/9] pwm: lpss: Move exported symbols to PWM

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Message-Id: <20220908135658.64463-3-andriy.shevchenko@linux.intel.com>
Date:   Thu,  8 Sep 2022 16:56:51 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-kernel@...r.kernel.org,
        linux-pwm@...r.kernel.org
Cc:     Thierry Reding <thierry.reding@...il.com>
Subject: [PATCH v2 2/9] pwm: lpss: Move exported symbols to PWM_LPSS namespace

Avoid unnecessary pollution of the global symbol namespace by
moving library functions in to a specific namespace and import
that into the drivers that make use of the functions.

For more info: https://lwn.net/Articles/760045/

Suggested-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pwm/pwm-lpss-pci.c      | 1 +
 drivers/pwm/pwm-lpss-platform.c | 1 +
 drivers/pwm/pwm-lpss.c          | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/drivers/pwm/pwm-lpss-pci.c b/drivers/pwm/pwm-lpss-pci.c
index 75b778e839b3..9f2c666b95ec 100644
--- a/drivers/pwm/pwm-lpss-pci.c
+++ b/drivers/pwm/pwm-lpss-pci.c
@@ -92,3 +92,4 @@ module_pci_driver(pwm_lpss_driver_pci);
 
 MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(PWM_LPSS);
diff --git a/drivers/pwm/pwm-lpss-platform.c b/drivers/pwm/pwm-lpss-platform.c
index 834423c34f48..65154c0abab1 100644
--- a/drivers/pwm/pwm-lpss-platform.c
+++ b/drivers/pwm/pwm-lpss-platform.c
@@ -88,4 +88,5 @@ module_platform_driver(pwm_lpss_driver_platform);
 
 MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(PWM_LPSS);
 MODULE_ALIAS("platform:pwm-lpss");
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 9537aefd254a..74a296cb1af0 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -18,6 +18,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/time.h>
 
+#define DEFAULT_SYMBOL_NAMESPACE PWM_LPSS
+
 #include "pwm-lpss.h"
 
 #define PWM				0x00000000
-- 
2.35.1