Unverified Commit da7c07b1 authored by Mark Brown's avatar Mark Brown
Browse files

driver core: Provide stubs for !IOMEM builds 



The various _ioremap_resource functions are not built when
CONFIG_HAS_IOMEM is disabled but no stubs are provided. Given how
widespread IOMEM usage is in drivers and how rare !IOMEM configurations
are in practical use let's just provide some stubs so users will build
without having to add explicit dependencies on HAS_IOMEM.

The most likely use case is builds with UML for KUnit testing.

Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: default avatarDavid Gow <davidgow@google.com>
Reviewed-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230718-asoc-topology-kunit-enable-v2-1-0ee11e662b92@kernel.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fdf0eaf1

include/linux/device.h

+26 −0
Original line number Diff line number Diff line
@@ -349,6 +349,7 @@ unsigned long devm_get_free_pages(struct device *dev, 
				  gfp_t gfp_mask, unsigned int order);

void devm_free_pages(struct device *dev, unsigned long addr);



#ifdef CONFIG_HAS_IOMEM

void __iomem *devm_ioremap_resource(struct device *dev,

				    const struct resource *res);

void __iomem *devm_ioremap_resource_wc(struct device *dev,
@@ -357,6 +358,31 @@ void __iomem *devm_ioremap_resource_wc(struct device *dev, 
void __iomem *devm_of_iomap(struct device *dev,

			    struct device_node *node, int index,

			    resource_size_t *size);

#else



static inline

void __iomem *devm_ioremap_resource(struct device *dev,

				    const struct resource *res)

{

	return ERR_PTR(-EINVAL);

}



static inline

void __iomem *devm_ioremap_resource_wc(struct device *dev,

				       const struct resource *res)

{

	return ERR_PTR(-EINVAL);

}



static inline

void __iomem *devm_of_iomap(struct device *dev,

			    struct device_node *node, int index,

			    resource_size_t *size)

{

	return ERR_PTR(-EINVAL);

}



#endif



/* allows to add/remove a custom action to devres stack */

void devm_remove_action(struct device *dev, void (*action)(void *), void *data);