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-rw-r--r--include/linux/hw_random.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/hw_random.h b/include/linux/hw_random.h
index 3f075ff00411..914bb08cd738 100644
--- a/include/linux/hw_random.h
+++ b/include/linux/hw_random.h
@@ -29,6 +29,8 @@
* @read: New API. drivers can fill up to max bytes of data
* into the buffer. The buffer is aligned for any type.
* @priv: Private data, for use by the RNG driver.
+ * @quality: Estimation of true entropy in RNG's bitstream
+ * (per mill).
*/
struct hwrng {
const char *name;
@@ -38,6 +40,7 @@ struct hwrng {
int (*data_read)(struct hwrng *rng, u32 *data);
int (*read)(struct hwrng *rng, void *data, size_t max, bool wait);
unsigned long priv;
+ unsigned short quality;
/* internal. */
struct list_head list;