Move c_src dirs back to toplevel

[bcachefs-tools-debian] / include / linux / prandom.h

diff --git a/include/linux/prandom.h b/include/linux/prandom.h
new file mode 100644 (file)
index 0000000..9aea22d
--- /dev/null
+++ b/include/linux/prandom.h
@@ -0,0 +1,33 @@
+#ifndef _LINUX_PRANDOM_H
+#define _LINUX_PRANDOM_H
+
+#include <linux/random.h>
+
+static inline void prandom_bytes(void *buf, int nbytes)
+{
+       return get_random_bytes(buf, nbytes);
+}
+
+#define prandom_type(type)                             \
+static inline type prandom_##type(void)                        \
+{                                                      \
+       type v;                                         \
+                                                       \
+       prandom_bytes(&v, sizeof(v));                   \
+       return v;                                       \
+}
+
+prandom_type(int);
+prandom_type(long);
+prandom_type(u32);
+prandom_type(u64);
+#undef prandom_type
+
+static inline u32 prandom_u32_max(u32 max)
+{
+       return prandom_u32() % max;
+
+}
+
+#endif /* _LINUX_PRANDOM_H */
+