Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8e37d00a authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Dan Williams
Browse files

memremap: provide stubs for vmem_altmap_offset and vmem_altmap_free 



Currently all calls to those functions are eliminated by the compiler when
CONFIG_ZONE_DEVICE is not set, but this soon won't be the case.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 30a7acd5

include/linux/memremap.h

+14 −4
Original line number Diff line number Diff line
@@ -26,9 +26,6 @@ struct vmem_altmap { 
	unsigned long alloc;

};



unsigned long vmem_altmap_offset(struct vmem_altmap *altmap);

void vmem_altmap_free(struct vmem_altmap *altmap, unsigned long nr_pfns);



#ifdef CONFIG_ZONE_DEVICE

struct vmem_altmap *to_vmem_altmap(unsigned long memmap_start);

#else
@@ -138,6 +135,9 @@ void *devm_memremap_pages(struct device *dev, struct resource *res, 
		struct percpu_ref *ref, struct vmem_altmap *altmap);

struct dev_pagemap *find_dev_pagemap(resource_size_t phys);



unsigned long vmem_altmap_offset(struct vmem_altmap *altmap);

void vmem_altmap_free(struct vmem_altmap *altmap, unsigned long nr_pfns);



static inline bool is_zone_device_page(const struct page *page);

#else

static inline void *devm_memremap_pages(struct device *dev,
@@ -157,7 +157,17 @@ static inline struct dev_pagemap *find_dev_pagemap(resource_size_t phys) 
{

	return NULL;

}

#endif



static inline unsigned long vmem_altmap_offset(struct vmem_altmap *altmap)

{

	return 0;

}



static inline void vmem_altmap_free(struct vmem_altmap *altmap,

		unsigned long nr_pfns)

{

}

#endif /* CONFIG_ZONE_DEVICE */



#if defined(CONFIG_DEVICE_PRIVATE) || defined(CONFIG_DEVICE_PUBLIC)

static inline bool is_device_private_page(const struct page *page)