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-rw-r--r--linux-core/drm_compat.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/linux-core/drm_compat.h b/linux-core/drm_compat.h
index 136a7296..8f2d9a94 100644
--- a/linux-core/drm_compat.h
+++ b/linux-core/drm_compat.h
@@ -333,4 +333,9 @@ typedef _Bool bool;
extern void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type,
pgprot_t protection);
#endif
+
+#if !defined(flush_agp_mappings)
+#define flush_agp_mappings() do {} while(0)
+#endif
+
#endif