Commit ad9f266b authored by Boris Brezillon's avatar Boris Brezillon
Browse files

drm/gem: Fix builds with CONFIG_MMU=n 



drm_gem_get_unmapped_area() relies on mm_get_unmapped_area() which is
only available if CONFIG_MMU=y.

Fixes: 99bda20d ("drm/gem: Introduce drm_gem_get_unmapped_area() fop")
Cc: Loïc Molinari <loic.molinari@collabora.com>
Reviewed-by: default avatarLoïc Molinari <loic.molinari@collabora.com>
Link: https://patch.msgid.link/20251209171151.2449120-1-boris.brezillon@collabora.com


Signed-off-by: default avatarBoris Brezillon <boris.brezillon@collabora.com>
parent 22ba3bb3

drivers/gpu/drm/drm_gem.c

+2 −0
Original line number Diff line number Diff line
@@ -1267,6 +1267,7 @@ drm_gem_object_lookup_at_offset(struct file *filp, unsigned long start, 
	return obj;

}



#ifdef CONFIG_MMU

/**

 * drm_gem_get_unmapped_area - get memory mapping region routine for GEM objects

 * @filp: DRM file pointer
@@ -1309,6 +1310,7 @@ unsigned long drm_gem_get_unmapped_area(struct file *filp, unsigned long uaddr, 
	return ret;

}

EXPORT_SYMBOL_GPL(drm_gem_get_unmapped_area);

#endif



/**

 * drm_gem_mmap - memory map routine for GEM objects

include/drm/drm_gem.h

+5 −0
Original line number Diff line number Diff line
@@ -537,9 +537,14 @@ void drm_gem_vm_close(struct vm_area_struct *vma); 
int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,

		     struct vm_area_struct *vma);

int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);



#ifdef CONFIG_MMU

unsigned long drm_gem_get_unmapped_area(struct file *filp, unsigned long uaddr,

					unsigned long len, unsigned long pgoff,

					unsigned long flags);

#else

#define drm_gem_get_unmapped_area NULL

#endif



/**

 * drm_gem_object_get - acquire a GEM buffer object reference