diff mbox series

[v3,8/8] random: Remove kernel.random.read_wakeup_threshold

Message ID a74ed2cf0b5a5451428a246a9239f5bc4e29358f.1577088521.git.luto@kernel.org
State Not Applicable
Headers show
Series Rework random blocking | expand

Commit Message

Andy Lutomirski Dec. 23, 2019, 8:20 a.m. UTC 
It has no effect any more, so remove it.  We can revert this if
there is some user code that expects to be able to set this sysctl.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
 drivers/char/random.c | 18 +-----------------
 1 file changed, 1 insertion(+), 17 deletions(-)

Comments

Theodore Ts'o Jan. 7, 2020, 9:04 p.m. UTC | #1 
On Mon, Dec 23, 2019 at 12:20:51AM -0800, Andy Lutomirski wrote:
> It has no effect any more, so remove it.  We can revert this if
> there is some user code that expects to be able to set this sysctl.
> 
> Signed-off-by: Andy Lutomirski <luto@kernel.org>

Applied, thanks.

					- Ted
diff mbox series

Patch

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 920bf771e3e1..2a6818cae2d6 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -369,12 +369,6 @@ 
 #define ENTROPY_SHIFT 3
 #define ENTROPY_BITS(r) ((r)->entropy_count >> ENTROPY_SHIFT)
 
-/*
- * The minimum number of bits of entropy before we wake up a read on
- * /dev/random.  Should be enough to do a significant reseed.
- */
-static int random_read_wakeup_bits = 64;
-
 /*
  * If the entropy count falls under this number of bits, then we
  * should wake up processes which are selecting or polling on write
@@ -2053,8 +2047,7 @@  SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count,
 
 #include <linux/sysctl.h>
 
-static int min_read_thresh = 8, min_write_thresh;
-static int max_read_thresh = OUTPUT_POOL_WORDS * 32;
+static int min_write_thresh;
 static int max_write_thresh = INPUT_POOL_WORDS * 32;
 static int random_min_urandom_seed = 60;
 static char sysctl_bootid[16];
@@ -2129,15 +2122,6 @@  struct ctl_table random_table[] = {
 		.proc_handler	= proc_do_entropy,
 		.data		= &input_pool.entropy_count,
 	},
-	{
-		.procname	= "read_wakeup_threshold",
-		.data		= &random_read_wakeup_bits,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= &min_read_thresh,
-		.extra2		= &max_read_thresh,
-	},
 	{
 		.procname	= "write_wakeup_threshold",
 		.data		= &random_write_wakeup_bits,