random: fix description of get_random_bytes

After this remark was written, commit d2e7c96a added a use of
arch_get_random_long() inside the get_random_bytes codepath.
The main point stands, but it needs to be reworded.
Signed-off-by: NGreg Price <price@mit.edu>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

drivers/char/random.c

@@ -1170,8 +1170,9 @@ static ssize_t extract_entropy_user(struct entropy_store *r, void __user *buf,
 /*
  * This function is the exported kernel interface.  It returns some
  * number of good random numbers, suitable for key generation, seeding
- * TCP sequence numbers, etc.  It does not use the hw random number
- * generator, if available; use get_random_bytes_arch() for that.
+ * TCP sequence numbers, etc.  It does not rely on the hardware random
+ * number generator.  For random bytes direct from the hardware RNG
+ * (when available), use get_random_bytes_arch().
  */
 void get_random_bytes(void *buf, int nbytes)
 {