X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=lib%2Flfsr.h;h=c2d55693e89aa4869eec1280ea1e431cc039689c;hb=53b5693d04b0de440ce3eb1fa22834ef46d0a4e3;hp=45d7028c49731f4f647d8977c26348a97f812b48;hpb=0415406ff0a7ced100565c4cba1322705b7fdb0a;p=fio.git

diff --git a/lib/lfsr.h b/lib/lfsr.h
index 45d7028c..c2d55693 100644
--- a/lib/lfsr.h
+++ b/lib/lfsr.h
@@ -3,7 +3,7 @@
 
 #include <inttypes.h>
 
-#define FIO_MAX_TAPS	8
+#define FIO_MAX_TAPS	6
 
 struct lfsr_taps {
 	unsigned int length;
@@ -12,14 +12,19 @@ struct lfsr_taps {
 
 
 struct fio_lfsr {
+	uint64_t xormask;
 	uint64_t last_val;
+	uint64_t cached_bit;
 	uint64_t max_val;
 	uint64_t num_vals;
-	struct lfsr_taps taps;
+	uint64_t cycle_length;
+	uint64_t cached_cycle_length;
+	unsigned int spin;
 };
 
-int lfsr_next(struct fio_lfsr *fl, uint64_t *off, uint64_t);
-int lfsr_init(struct fio_lfsr *fl, uint64_t size, unsigned long seed);
-void lfsr_reset(struct fio_lfsr *fl, unsigned long seed);
+int lfsr_next(struct fio_lfsr *fl, uint64_t *off);
+int lfsr_init(struct fio_lfsr *fl, uint64_t size,
+		unsigned long seed, unsigned int spin);
+int lfsr_reset(struct fio_lfsr *fl, unsigned long seed);
 
 #endif