Hi Boris,
I missed that one, thanks for the fix.
On 09/12/2025 18:11, Boris Brezillon wrote:
drm_gem_get_unmapped_area() relies on mm_get_unmapped_area() which is
only available if CONFIG_MMU=y.
Fixes: 99bda20d6d4c ("drm/gem: Introduce drm_gem_get_unmapped_area() fop")
Cc: Loïc Molinari <[email protected]>
Signed-off-by: Boris Brezillon <[email protected]>
Reviewed-by: Loïc Molinari <[email protected]>
Regards,
Loïc
---
drivers/gpu/drm/drm_gem.c | 2 ++
include/drm/drm_gem.h | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 6021c4087a08..ca1956608261 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -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
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index cca815dc87f3..f4da8ed0d630 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -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
