drm/shmem-helper: Make all exported symbols GPL

Make all drm-shmem exported symbols GPL to make them consistent with
the rest of drm-shmem symbols.

Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-5-dmitry.osipenko@collabora.com

drivers/gpu/drm/drm_gem_shmem_helper.c

@@ -247,7 +247,7 @@ void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem)
 			  shmem->pages_mark_accessed_on_put);
 	shmem->pages = NULL;
 }
-EXPORT_SYMBOL(drm_gem_shmem_put_pages);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages);
 
 int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem)
 {
@@ -296,7 +296,7 @@ int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem)
 
 	return ret;
 }
-EXPORT_SYMBOL(drm_gem_shmem_pin);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_pin);
 
 /**
  * drm_gem_shmem_unpin - Unpin backing pages for a shmem GEM object
@@ -315,7 +315,7 @@ void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem)
 	drm_gem_shmem_unpin_locked(shmem);
 	dma_resv_unlock(shmem->base.resv);
 }
-EXPORT_SYMBOL(drm_gem_shmem_unpin);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_unpin);
 
 /*
  * drm_gem_shmem_vmap - Create a virtual mapping for a shmem GEM object
@@ -385,7 +385,7 @@ err_zero_use:
 
 	return ret;
 }
-EXPORT_SYMBOL(drm_gem_shmem_vmap);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_vmap);
 
 /*
  * drm_gem_shmem_vunmap - Unmap a virtual mapping for a shmem GEM object
@@ -421,7 +421,7 @@ void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem,
 
 	shmem->vaddr = NULL;
 }
-EXPORT_SYMBOL(drm_gem_shmem_vunmap);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_vunmap);
 
 static int
 drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
@@ -460,7 +460,7 @@ int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv)
 
 	return (madv >= 0);
 }
-EXPORT_SYMBOL(drm_gem_shmem_madvise);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_madvise);
 
 void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem)
 {
@@ -492,7 +492,7 @@ void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem)
 
 	invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1);
 }
-EXPORT_SYMBOL(drm_gem_shmem_purge);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_purge);
 
 /**
  * drm_gem_shmem_dumb_create - Create a dumb shmem buffer object
@@ -670,7 +670,7 @@ void drm_gem_shmem_print_info(const struct drm_gem_shmem_object *shmem,
 	drm_printf_indent(p, indent, "vmap_use_count=%u\n", shmem->vmap_use_count);
 	drm_printf_indent(p, indent, "vaddr=%p\n", shmem->vaddr);
 }
-EXPORT_SYMBOL(drm_gem_shmem_print_info);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_print_info);
 
 /**
  * drm_gem_shmem_get_sg_table - Provide a scatter/gather table of pinned