lib: Wrap conversion from u64 to pointers

The opposite direction of to_user_pointer() is from_user_pointer().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/ioctl_wrappers.h b/lib/ioctl_wrappers.h
index f9507ad0..57ba5a29 100644
--- a/lib/ioctl_wrappers.h
+++ b/lib/ioctl_wrappers.h
@@ -250,4 +250,14 @@ static inline uint64_t to_user_pointer(const void *ptr)
 	return (uintptr_t)ptr;
 }
 
+/**
+ * from_user_pointer:
+ *
+ * Casts a 64bit value from an ioctl into a pointer.
+ */
+static inline void *from_user_pointer(uint64_t u64)
+{
+	return (void *)(uintptr_t)u64;
+}
+
 #endif /* IOCTL_WRAPPERS_H */