linux-kernel - [PATCH v2 1/2] PNP: Make dev_is_pnp() to be a function and export it for modules

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Date: Tue, 28 May 2024 13:25:02 +0300
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Guanbing Huang <albanhuang@...look.com>,
	Guanbing Huang <albanhuang@...cent.com>,
	Christoph Hellwig <hch@...radead.org>,
	Woody Suwalski <terraluna977@...il.com>
Subject: [PATCH v2 1/2] PNP: Make dev_is_pnp() to be a function and export it for modules

Since we have a dev_is_pnp() macro that utilises the address of the
pnp_bus_type variable, the users, which can be compiled as modules,
will fail to build. Convert the macro to be a function and export it
to the modules to prevent build breakage.

Reported-by: Woody Suwalski <terraluna977@...il.com>
Closes: https://lore.kernel.org/r/cc8a93b2-2504-9754-e26c-5d5c3bd1265c@gmail.com
Fixes: 2a49b45cd0e7 ("PNP: Add dev_is_pnp() macro")
Signed-off-by: Andy Shevchenko <andy.shevchenko@...il.com>
---
 drivers/pnp/driver.c | 6 ++++++
 include/linux/pnp.h  | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index 0a5d0d8befa8..3483e52e3a81 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -266,6 +266,12 @@ const struct bus_type pnp_bus_type = {
 	.dev_groups = pnp_dev_groups,
 };
 
+bool dev_is_pnp(const struct device *dev)
+{
+	return dev->bus == &pnp_bus_type;
+}
+EXPORT_SYMBOL_GPL(dev_is_pnp);
+
 int pnp_register_driver(struct pnp_driver *drv)
 {
 	drv->driver.name = drv->name;
diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 82561242cda4..a8def1cea32c 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -469,7 +469,7 @@ int compare_pnp_id(struct pnp_id *pos, const char *id);
 int pnp_register_driver(struct pnp_driver *drv);
 void pnp_unregister_driver(struct pnp_driver *drv);
 
-#define dev_is_pnp(d) ((d)->bus == &pnp_bus_type)
+bool dev_is_pnp(const struct device *dev);
 
 #else
 
@@ -502,7 +502,7 @@ static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -E
 static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
 static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
 
-#define dev_is_pnp(d) false
+static inline bool dev_is_pnp(const struct device *dev) { return false; }
 
 #endif /* CONFIG_PNP */
 
-- 
2.45.1