[PATCH 4.9 037/264] drivers/char/random.c: remove unused stuct poolinfo::poolbits

Greg Kroah-Hartman
2022-06-23T16:48:15Z

From: Rasmus Villemoes <linux@rasmusvillemoes.dk>

commit 3bd0b5bf7dc3ea02070fcbcd682ecf628269e8ef upstream.

This field is never used, might as well remove it.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/char/random.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -296,7 +296,7 @@
* To allow fractional bits to be tracked, the entropy_count field is
* denominated in units of 1/8th bits.
*
- * 2*(ENTROPY_SHIFT + log2(poolbits)) must <= 31, or the multiply in
+ * 2*(ENTROPY_SHIFT + poolbitshift) must <= 31, or the multiply in
* credit_entropy_bits() needs to be 64 bits wide.
*/
#define ENTROPY_SHIFT 3
@@ -361,8 +361,8 @@ static int random_write_wakeup_bits = 28
* irreducible, which we have made here.
*/
static const struct poolinfo {
- int poolbitshift, poolwords, poolbytes, poolbits, poolfracbits;
-#define S(x) ilog2(x)+5, (x), (x)*4, (x)*32, (x) << (ENTROPY_SHIFT+5)
+ int poolbitshift, poolwords, poolbytes, poolfracbits;
+#define S(x) ilog2(x)+5, (x), (x)*4, (x) << (ENTROPY_SHIFT+5)
int tap1, tap2, tap3, tap4, tap5;
} poolinfo_table[] = {
/* was: x^128 + x^103 + x^76 + x^51 +x^25 + x + 1 */