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-rw-r--r--include/linux/uaccess.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 1b8c9d6162bc..b21a2de80c0f 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -10,6 +10,7 @@
#include <asm/uaccess.h>
+#ifdef CONFIG_SET_FS
/*
* Force the uaccess routines to be wired up for actual userspace access,
* overriding any possible set_fs(KERNEL_DS) still lingering around. Undone
@@ -27,6 +28,23 @@ static inline void force_uaccess_end(mm_segment_t oldfs)
{
set_fs(oldfs);
}
+#else /* CONFIG_SET_FS */
+typedef struct {
+ /* empty dummy */
+} mm_segment_t;
+
+#define uaccess_kernel() (false)
+#define user_addr_max() (TASK_SIZE_MAX)
+
+static inline mm_segment_t force_uaccess_begin(void)
+{
+ return (mm_segment_t) { };
+}
+
+static inline void force_uaccess_end(mm_segment_t oldfs)
+{
+}
+#endif /* CONFIG_SET_FS */
/*
* Architectures should provide two primitives (raw_copy_{to,from}_user())